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Monte Carlo Simulation: H-Energy is not convergating & high Incident Radiation

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Old   March 31, 2016, 03:44
Exclamation Monte Carlo Simulation: H-Energy is not convergating & high Incident Radiation
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Hey folks,

I am simulating a simple laminar flow in a rectangular channel, with typical inlet and outlet. The walls on the bottom, backside and front have normal no slip BCs. The top of the channel is open, what i modeled as a wall with slip free BC (should be good enough for the beginning).
In the channel is participating fluid flow, and at the front wall is my radiation source with a directional radiation flux (which are lamps in the real experiment). The fluid is modeled as multiband spectral model, to have a better view on the results. Therefor i defined the following 4 wavelength-bands:
  • MIR - 1.6 - 1000 micron
  • NIR - 0.8 - 1.6 micron
  • Vis - 0.3 - 0.8 micron
  • UV - 0 - 0.3 micron
Both, the absorption of the fluid and the radiation of the source depend on the wavelength. Therefor i deposited the function lampe and absorption.

When I run the case, the H-Energy residuals are not convergating (stay above 10^-4) and when i look in my results i have very very high incident radiation in my MIR band, from about ~3000 W/mē and also looks very strange (more like a test picture, than a good resolution for a directional radiation). But the function of my radiation source should be nearly 0 in that area.

I am not too advanced with Ansys yet, so I would be glad if you guys can help me a bit with that problem. I already tried out alot, changed some BCs etc.
If its possible I could also change the radiation model, but as far as I know Monte Carlo is the only model whre I can use multiband option and directional radiaton.

Kind regards

volleyHC


Incident radiation of the MIR band:


The Log-File:
Code:
 +--------------------------------------------------------------------+
 |                                                                    |
 |                    CFX Command Language for Run                    |
 |                                                                    |
 +--------------------------------------------------------------------+

 LIBRARY:
   CEL:
     EXPRESSIONS:
       Expression 1 = lampe(Wavelength in Vacuum )
       Expression 2 = absorption(Wavelength in Vacuum )
     END
     FUNCTION: absorption
       Argument Units = micron
       Option = Interpolation
       Result Units = m^-1
       INTERPOLATION DATA:
         Data Pairs = ......
           
         Extend Max = No
         Extend Min = No
         Option = One Dimensional
       END
     END
     FUNCTION: lampe
       Argument Units = micron
       Option = Interpolation
       Result Units = W m^-2
       INTERPOLATION DATA:
         Data Pairs = .....

         Extend Max = No
         Extend Min = No
         Option = One Dimensional
       END
     END
   END
   MATERIAL: AgNano3eMinus6
     Material Group = Water Data
     Option = Pure Substance
     Thermodynamic State = Liquid
     PROPERTIES:
       Option = General Material
       EQUATION OF STATE:
         Density = 998 [kg m^-3]
         Molar Mass = 18 [kg kmol^-1]
         Option = Value
       END
       SPECIFIC HEAT CAPACITY:
         Option = Value
         Specific Heat Capacity = 4180 [J kg^-1 K^-1]
         Specific Heat Type = Constant Pressure
       END
       DYNAMIC VISCOSITY:
         Dynamic Viscosity = 1e-3 [Pa s]
         Option = Value
       END
       THERMAL CONDUCTIVITY:
         Option = Value
         Thermal Conductivity = 0.6 [W m^-1 K^-1]
       END
       ABSORPTION COEFFICIENT:
         Absorption Coefficient = absorption(Wavelength in Vacuum )
         Option = Value
       END
       REFRACTIVE INDEX:
         Option = Value
         Refractive Index = 1.33
       END
       THERMAL EXPANSIVITY:
         Option = Value
         Thermal Expansivity = 1 [K^-1]
       END
     END
   END
 END
 FLOW: Flow Analysis 1
   SOLUTION UNITS:
     Angle Units = [rad]
     Length Units = [m]
     Mass Units = [kg]
     Solid Angle Units = [sr]
     Temperature Units = [K]
     Time Units = [s]
   END
   ANALYSIS TYPE:
     Option = Steady State
     EXTERNAL SOLVER COUPLING:
       Option = None
     END
   END
   DOMAIN: Default Domain
     Coord Frame = Coord 0
     Domain Type = Fluid
     Location = B16
     BOUNDARY: Inlet
       Boundary Type = INLET
       Location = F20.16
       BOUNDARY CONDITIONS:
         FLOW REGIME:
           Option = Subsonic
         END
         HEAT TRANSFER:
           Option = Static Temperature
           Static Temperature = 20 [C]
         END
         MASS AND MOMENTUM:
           Normal Speed = 0.01 [m s^-1]
           Option = Normal Speed
         END
         THERMAL RADIATION:
           Option = Local Temperature
         END
       END
     END
     BOUNDARY: Outlet
       Boundary Type = OUTLET
       Location = F17.16
       BOUNDARY CONDITIONS:
         FLOW REGIME:
           Option = Subsonic
         END
         MASS AND MOMENTUM:
           Option = Static Pressure
           Relative Pressure = 0 [Pa]
         END
         THERMAL RADIATION:
           Option = Local Temperature
         END
       END
     END
     BOUNDARY: hinten
       Boundary Type = WALL
       Location = F22.16
       BOUNDARY CONDITIONS:
         HEAT TRANSFER:
           Option = Adiabatic
         END
         MASS AND MOMENTUM:
           Option = No Slip Wall
         END
         THERMAL RADIATION:
           Diffuse Fraction = 0
           Emissivity = 0
           Option = Opaque
         END
       END
     END
     BOUNDARY: oben
       Boundary Type = WALL
       Location = F19.16
       BOUNDARY CONDITIONS:
         HEAT TRANSFER:
           Heat Transfer Coefficient = 7 [W m^-2 K^-1]
           Option = Heat Transfer Coefficient
           Outside Temperature = 20 [C]
         END
         MASS AND MOMENTUM:
           Option = Free Slip Wall
         END
         THERMAL RADIATION:
           Diffuse Fraction = 0
           Emissivity = 0
           Option = Opaque
         END
       END
     END
     BOUNDARY: unten
       Boundary Type = WALL
       Location = F21.16
       BOUNDARY CONDITIONS:
         HEAT TRANSFER:
           Option = Adiabatic
         END
         MASS AND MOMENTUM:
           Option = No Slip Wall
         END
         THERMAL RADIATION:
           Diffuse Fraction = 0
           Emissivity = 0
           Option = Opaque
         END
       END
     END
     BOUNDARY: vorne
       Boundary Type = WALL
       Location = F18.16
       BOUNDARY CONDITIONS:
         HEAT TRANSFER:
           Option = Adiabatic
         END
         MASS AND MOMENTUM:
           Option = No Slip Wall
         END
         THERMAL RADIATION:
           Diffuse Fraction = 0
           Emissivity = 1.
           Option = Opaque
         END
       END
       BOUNDARY SOURCE:
         SOURCES:
           RADIATION SOURCE: Radiation Source 1
             External Refractive Index = 1.0
             Option = Directional Radiation Flux
             Radiation Flux = lampe(Wavelength in Vacuum )
             DIRECTION:
               Option = Cartesian Components
               Unit Vector X Component = 0
               Unit Vector Y Component = 0
               Unit Vector Z Component = 0.2
             END
           END
         END
       END
     END
     DOMAIN MODELS:
       BUOYANCY MODEL:
         Option = Non Buoyant
       END
       DOMAIN MOTION:
         Option = Stationary
       END
       MESH DEFORMATION:
         Option = None
       END
       REFERENCE PRESSURE:
         Reference Pressure = 1 [bar]
       END
     END
     FLUID DEFINITION: Fluid 1
       Material = AgNano3eMinus6
       Option = Material Library
       MORPHOLOGY:
         Option = Continuous Fluid
       END
     END
     FLUID MODELS:
       COMBUSTION MODEL:
         Option = None
       END
       HEAT TRANSFER MODEL:
         Include Viscous Dissipation Term = On
         Option = Thermal Energy
       END
       THERMAL RADIATION MODEL:
         Number of Histories = 2000000
         Option = Monte Carlo
         Radiation Transfer Mode = Participating Media
         SCATTERING MODEL:
           Option = None
         END
         SPECTRAL MODEL:
           Option = Multiband
           SPECTRAL BAND: MIR
             Option = Wavelength in Vacuum
             Wavelength Lower Limit = 1.6 [micron]
             Wavelength Upper Limit = 1000. [micron]
           END
           SPECTRAL BAND: NIR
             Option = Wavelength in Vacuum
             Wavelength Lower Limit = 0.8 [micron]
             Wavelength Upper Limit = 1.6 [micron]
           END
           SPECTRAL BAND: UV
             Option = Wavelength in Vacuum
             Wavelength Lower Limit = 0. [micron]
             Wavelength Upper Limit = 0.3 [micron]
           END
           SPECTRAL BAND: Vis
             Option = Wavelength in Vacuum
             Wavelength Lower Limit = 0.3 [micron]
             Wavelength Upper Limit = 0.8 [micron]
           END
         END
       END
       TURBULENCE MODEL:
         Option = Laminar
       END
     END
   END
   INITIALISATION:
     Option = Automatic
     INITIAL CONDITIONS:
       Velocity Type = Cartesian
       CARTESIAN VELOCITY COMPONENTS:
         Option = Automatic with Value
         U = 0.01 [m s^-1]
         V = 0 [m s^-1]
         W = 0 [m s^-1]
       END
       RADIATION INTENSITY:
         Option = Automatic with Value
         Radiation Intensity = 0 [W m^-2 sr^-1]
       END
       STATIC PRESSURE:
         Option = Automatic with Value
         Relative Pressure = 0 [Pa]
       END
       TEMPERATURE:
         Option = Automatic with Value
         Temperature = 20 [C]
       END
     END
   END
   OUTPUT CONTROL:
     MONITOR OBJECTS:
       MONITOR BALANCES:
         Option = Full
       END
       MONITOR FORCES:
         Option = Full
       END
       MONITOR PARTICLES:
         Option = Full
       END
       MONITOR RESIDUALS:
         Option = Full
       END
       MONITOR TOTALS:
         Option = Full
       END
     END
     RESULTS:
       File Compression Level = Default
       Option = Standard
     END
   END
   SOLVER CONTROL:
     ADVECTION SCHEME:
       Option = High Resolution
     END
     CONVERGENCE CONTROL:
       Length Scale Option = Conservative
       Maximum Number of Iterations = 10000
       Minimum Number of Iterations = 1
       Timescale Control = Auto Timescale
       Timescale Factor = 1.0
     END
     CONVERGENCE CRITERIA:
       Residual Target = 1e-06
       Residual Type = RMS
     END
     DYNAMIC MODEL CONTROL:
       Global Dynamic Model Control = On
     END
     EQUATION CLASS: continuity
       CONVERGENCE CONTROL:
         Length Scale Option = Conservative
         Timescale Control = Auto Timescale
         Timescale Factor = 1.0
       END
       CONVERGENCE CRITERIA:
         Residual Target = 0.000001
         Residual Type = RMS
       END
     END
     EQUATION CLASS: energy
       CONVERGENCE CONTROL:
         Length Scale Option = Conservative
         Timescale Control = Auto Timescale
         Timescale Factor = 1.0
       END
       CONVERGENCE CRITERIA:
         Residual Target = 1e-08
         Residual Type = RMS
       END
     END
     EQUATION CLASS: momentum
       CONVERGENCE CONTROL:
         Length Scale Option = Conservative
         Timescale Control = Auto Timescale
         Timescale Factor = 1.0
       END
       CONVERGENCE CRITERIA:
         Residual Target = 0.000001
         Residual Type = RMS
       END
     END
   END
 END
 COMMAND FILE:
   Version = 16.2
   Results Version = 16.2
 END
 SIMULATION CONTROL:
   EXECUTION CONTROL:
     EXECUTABLE SELECTION:
       Double Precision = No
     END
     INTERPOLATOR STEP CONTROL:
       Runtime Priority = Standard
       MEMORY CONTROL:
         Memory Allocation Factor = 1.0
       END
     END
     PARALLEL HOST LIBRARY:
       HOST DEFINITION: keelah
         Host Architecture String = winnt-amd64
         Installation Root = C:\Program Files\ANSYS Inc\v%v\CFX
       END
     END
     PARTITIONER STEP CONTROL:
       Multidomain Option = Automatic
       Runtime Priority = Idle
       EXECUTABLE SELECTION:
         Use Large Problem Partitioner = Off
       END
       MEMORY CONTROL:
         Memory Allocation Factor = 1.0
       END
       PARTITION SMOOTHING:
         Maximum Partition Smoothing Sweeps = 100
         Option = Smooth
       END
       PARTITIONING TYPE:
         MeTiS Type = k-way
         Option = MeTiS
         Partition Size Rule = Automatic
         Partition Weight Factors = 0.25000, 0.25000, 0.25000, 0.25000
       END
     END
     RUN DEFINITION:
       Run Mode = Full
       Solver Input File = Fluid Flow CFX.def
       Solver Results File = \
         E:/Ansys_Work/Kanal/Kanal002_pending/dp0_CFX_2_Solution_2/Fluid Flow \
         CFX_007.res
     END
     SOLVER STEP CONTROL:
       Runtime Priority = Standard
       MEMORY CONTROL:
         Memory Allocation Factor = 1.0
       END
       PARALLEL ENVIRONMENT:
         Number of Processes = 4
         Start Method = Platform MPI Local Parallel
         Parallel Host List = keelah*4
       END
     END
   END
 END
Had to cut out the INTERPOLATION DATA, because the post was to long with it!

Last edited by volleyHC; March 31, 2016 at 14:22.
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Old   March 31, 2016, 09:12
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Nice post - thanks for giving a clear description and including plenty of information.

When I look at your image it looks like the radiation model has not got enough rays to accurately model the distribution. This will also mean the heat equation has a hard time converging as radiation heat load is all over the place.

Have a look at the options for your radiation model and try to add more ray tracing, run the rays longer. I can't give you the exact options to choose as I am writing this from home, but have a look at the options available under the radiation model.
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Old   March 31, 2016, 10:01
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Thanks for your answer so far. I just tried to be as specific as I could, hoping everything will be clear!
I already tried some different Number of Histories in the Monte Carlo Options (from 100,000 - 10,000,000) but that didn`t change much (except the calculation time). And it also seems that the results don't change alot, whatever i stop the calculation after ~200 timesteps or 1000.
But I will go on, checking my options

But I really wonder why the incident radiation is that high in the MIR band.

Here is the part of the absorption function concerning the MIR band
Code:
1,6	773,9786997	
1,605	750,2439988	
1,61	729,9210398	
1,615	711,3216078	
1,62	692,6510766	
1,625	676,3675608	
1,63	662,0896591	
1,635	646,869667	
1,64	634,6799583	
1,645	626,3101641	
1,65	616,7981808	
1,655	606,534028	
1,66	600,0665601	
1,665	594,2078175	
1,67	589,7065679	
1,675	585,9433858	
1,68	583,9024661	
1,685	583,9639049	
1,69	583,8570969	
1,695	585,4270252	
1,7	588,8064375	
1,705	591,6195953	
1,71	597,8752422	
1,715	607,2002148	
1,72	618,2670663	
1,725	630,4562065	
1,73	644,3750966	
1,735	661,7625939	
1,74	682,5698288	
1,745	707,8633257	
1,75	735,6606947	
1,755	762,855249	
1,76	789,479667	
1,765	826,0583917	
1,77	856,1847686	
1,775	879,7320573	
1,78	899,0005169	
1,785	913,2439043	
1,79	917,7492674	
1,795	917,4891609	
1,8	917,9468421	
1,805	926,1134879	
1,81	918,5335166	
1,815	917,8638647	
1,82	920,5711555	
1,825	923,6714283	
1,83	936,5191798	
1,835	956,451588	
1,84	981,0064806	
1,845	1008,394198	
1,85	1084,421466	
1,855	1188,549602	
1,86	1333,716797	
1,865	1546,717113	
1,87	1931,953968	
1,875	2490,826052	
1,88	3247,652051	
1,885	4440,884627	
1,89	5966,428144	
1,895	7689,90509	
1,9	9460,925033	
1,905	10851,14228	
1,91	11970,94846	
1,915	12748,71328	
1,92	13208,79632	
1,925	13514,99957	
1,93	13655,95968	
1,935	13560,29226	
1,94	13369,88118	
1,945	13077,07546	
1,95	12636,19604	
1,955	12151,3602	
1,96	11620,77014	
1,965	11092,88045	
1,97	10569,58232	
1,975	10053,38343	
1,98	9539,791795	
1,985	9037,109421	
1,99	8574,768055	
1,995	8141,654389	
2	7728,601648	
2,1	0	
5	0	
10	0	
100	0	
1000	0
and here is the part of the lampe function (source) concerning the MIR band:
As you can see, the source in this area is minimal to nearly 0!
Code:
1.60898	15.41
1.64583	0.00
1.83739	0.00
1.94769	0.00
2.08192	0.00
2.23201	0.00
2.49504	0.00
2.69219	0.00
5	0.0
10	0.0
100	0.0
1000	0.00
Maybe it helps!
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Old   March 31, 2016, 11:10
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As Glenn mentioned, thank you for the detailed explanation and useful information.

Your plot is on a wall for the Incident Radiation. At walls you are better served by looking at the Wall Irradiation Flux instead since it is the amount of radiative energy arriving from everywhere else. In addition, you should look at the diagnostic variables for Monte Carlo suffixed by Normalized Standard Deviation (or similar). Those variables will give you a statistical measure of how good the radiative calculation is.

The H-Energy equation does not converge as usual when using the Monte Carlo model since every iteration, the radiative calculation is brand new and not frozen. If you increase the Number of Histories, the H-Energy residual will settle at a lower value; however, it will not converge monotonically as it is the case when using P1, or Discrete Transfer.

Hope the above helps,
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Old   March 31, 2016, 14:16
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Thanks for you answer. I will have a look and give some feedback later.

Quote:
Originally Posted by Opaque View Post
Your plot is on a wall for the Incident Radiation.
Well, actually the plat isnt on the wall, it's on a plane parallel to the wall. But i understand, that it looks like its on the wall. The distance is nearly 0, so maybe not the best example, sorry.
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Old   April 3, 2016, 06:41
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Hey again,

I've done some more simulations with Number of Histories 1,000,000, and this is what i got:

XY- and XZ-Plane show the Normalized Standard Deviation of the Radiation Intensity



and here is the end of the .out-File
Code:
======================================================================
 OUTER LOOP ITERATION = 1970 ( 1142) CPU SECONDS = 1.487E+05 (8.775E+04)
 ----------------------------------------------------------------------
 |       Equation       | Rate | RMS Res | Max Res |  Linear Solution |
 +----------------------+------+---------+---------+------------------+
 | U-Mom                | 1.00 | 7.1E-17 | 1.0E-15 |       7.8E-03  OK|
 | V-Mom                | 1.00 | 1.0E-16 | 1.4E-15 |       8.6E-03  OK|
 | W-Mom                | 1.00 | 1.1E-16 | 1.0E-15 |       8.3E-03  OK|
 | P-Mass               | 0.96 | 3.3E-17 | 3.2E-16 |  5.0  5.9E-03  OK|
 +----------------------+------+---------+---------+------------------+
 | I-Radiation          |      | %SD Vol | %SD Sur | %Lost  %Imbal    |
 |   Full Spectrum      |      | 1.8E+00 | 5.3E+00 |  0.00    0.01    |
 +----------------------+------+---------+---------+------------------+
 | H-Energy             | 0.87 | 1.4E-03 | 4.3E-02 |  5.7  3.0E-04  OK|
 +----------------------+------+---------+---------+------------------+


 Execution terminating: STP file found.
 


                   
 CFD Solver finished: Fri Apr 01 13:44:25 2016
 CFD Solver wall clock seconds: 2.1953E+04

 ======================================================================
              Termination and Interrupt Condition Summary
 ======================================================================
    
 CFD Solver: Stop instruction received

 ======================================================================
              Boundary Flow and Total Source Term Summary
 ======================================================================

 +--------------------------------------------------------------------+
 |                               U-Mom                                |
 +--------------------------------------------------------------------+
 Boundary         : Inlet                                   3.2097E-04
 Boundary         : Outlet                                 -1.2017E-04
 Boundary         : hinten                                 -2.5288E-05
 Boundary         : oben                                   -1.6116E-26
 Boundary         : unten                                  -1.5023E-04
 Boundary         : vorne                                  -2.5288E-05
                                                           -----------
 Domain Imbalance :                                         8.4703E-20

 +--------------------------------------------------------------------+
 |                               V-Mom                                |
 +--------------------------------------------------------------------+
 Boundary         : Inlet                                  -3.5089E-07
 Boundary         : Outlet                                  9.5095E-07
 Boundary         : hinten                                 -8.7743E-08
 Boundary         : oben                                   -6.2346E-03
 Boundary         : unten                                   6.2342E-03
 Boundary         : vorne                                  -8.7743E-08
                                                           -----------
 Domain Imbalance :                                         7.2405E-18

 +--------------------------------------------------------------------+
 |                               W-Mom                                |
 +--------------------------------------------------------------------+
 Boundary         : Inlet                                  -4.9896E-21
 Boundary         : Outlet                                  2.4352E-21
 Boundary         : hinten                                 -1.3428E-03
 Boundary         : oben                                    7.1688E-25
 Boundary         : unten                                  -6.3569E-22
 Boundary         : vorne                                   1.3428E-03
                                                           -----------
 Domain Imbalance :                                        -1.5179E-18

 +--------------------------------------------------------------------+
 |                               P-Mass                               |
 +--------------------------------------------------------------------+
 Boundary         : Inlet                                   9.0818E-03
 Boundary         : Outlet                                 -9.0818E-03
                                                           -----------
 Domain Imbalance :                                         6.5919E-17

 +--------------------------------------------------------------------+
 |                            I-Radiation                             |
 +--------------------------------------------------------------------+
 Boundary         : Inlet                                  -1.8641E-03
 Boundary         : Outlet                                  2.0099E-03
 Boundary         : oben                                   -5.5201E-15
 Boundary         : unten                                  -5.5240E-15
 Boundary         : vorne                                   6.9653E-01
 Domain Src (Neg) : Default Domain                         -6.9668E-01
                                                           -----------
 Global Imbalance :                                        -1.4655E-14

 +--------------------------------------------------------------------+
 |                              H-Energy                              |
 +--------------------------------------------------------------------+
 Boundary         : Inlet                                  -1.8981E+02
 Boundary         : Outlet                                  1.8908E+02
 Boundary         : oben                                   -5.0950E-03
 Boundary         : unten                                   5.5279E-15
 Boundary         : vorne                                   4.1513E-02
 Domain Src (Pos) : Default Domain                          6.9668E-01
                                                           -----------
 Domain Imbalance :                                        -1.7041E-03


 +--------------------------------------------------------------------+
 |                     Normalised Imbalance Summary                   |
 +--------------------------------------------------------------------+
 |       Equation       |      Maximum Flow     |     Imbalance (%)   |
 +--------------------------------------------------------------------+
 | U-Mom                |       6.2346E-03      |        0.0000       |
 | V-Mom                |       6.2346E-03      |        0.0000       |
 | W-Mom                |       6.2346E-03      |       -0.0000       |
 | P-Mass               |       9.0818E-03      |        0.0000       |
 +----------------------+-----------------------+---------------------+
 | I-Radiation          |       6.9668E-01      |       -0.0000       |
 +----------------------+-----------------------+---------------------+
 | H-Energy             |       1.8981E+02      |       -0.0009       |
 +----------------------+-----------------------+---------------------+

 ======================================================================
                     Wall Force and Moment Summary
 ======================================================================
                                                                          
 Notes:
 1. Pressure integrals exclude the reference pressure.  To include
    it, set the expert parameter 'include pref in forces = t'.


 +--------------------------------------------------------------------+
 |                      Pressure Force On Walls                       |
 +--------------------------------------------------------------------+
                                    X-Comp.      Y-Comp.      Z-Comp.

 Domain Group: Default Domain

 hinten                           0.0000E+00   0.0000E+00   1.3430E-03
 oben                             0.0000E+00   6.2340E-03   0.0000E+00
 unten                            0.0000E+00  -6.2350E-03   0.0000E+00
 vorne                            0.0000E+00   0.0000E+00  -1.3430E-03
                                  -----------  -----------  -----------
 Domain Group Totals :            0.0000E+00  -1.0408E-06   2.1684E-18


 +--------------------------------------------------------------------+
 |                       Viscous Force On Walls                       |
 +--------------------------------------------------------------------+
                                    X-Comp.      Y-Comp.      Z-Comp.

 Domain Group: Default Domain

 hinten                           2.5288E-05   8.7743E-08  -1.9652E-07
 oben                             1.6116E-26   5.9946E-07  -7.1688E-25
 unten                            1.5023E-04   8.6587E-07   1.0154E-21
 vorne                            2.5288E-05   8.7743E-08   1.9652E-07
                                  -----------  -----------  -----------
 Domain Group Totals :            2.0080E-04   1.6408E-06  -2.1176E-22


 +--------------------------------------------------------------------+
 |                      Pressure Moment On Walls                      |
 +--------------------------------------------------------------------+
                                    X-Comp.      Y-Comp.      Z-Comp.

 Domain Group: Default Domain

 hinten                           9.4004E-06  -3.9800E-04   0.0000E+00
 oben                            -2.0260E-04   0.0000E+00   1.8482E-03
 unten                            2.0264E-04   0.0000E+00  -1.8481E-03
 vorne                           -9.4004E-06   3.9800E-04   0.0000E+00
                                  -----------  -----------  -----------
 Domain Group Totals :            3.3824E-08  -3.7947E-19   9.5518E-08


 +--------------------------------------------------------------------+
 |                       Viscous Moment On Walls                      |
 +--------------------------------------------------------------------+
                                    X-Comp.      Y-Comp.      Z-Comp.

 Domain Group: Default Domain

 hinten                          -7.1440E-09   1.6483E-06  -2.0331E-07
 oben                            -1.9482E-08   7.6611E-26   6.7092E-08
 unten                           -2.8141E-08   4.8824E-06   1.7605E-08
 vorne                            1.4407E-09  -4.6304E-09  -2.0331E-07
                                  -----------  -----------  -----------
 Domain Group Totals :           -5.3326E-08   6.5261E-06  -3.2193E-07


 +--------------------------------------------------------------------+
 |                   Locations of Maximum Residuals                   |
 +--------------------------------------------------------------------+
 |       Equation       |      Domain Name      |     Node Number     |
 +--------------------------------------------------------------------+
 | U-Mom                | Default Domain        |          75456      |
 | V-Mom                | Default Domain        |          90592      |
 | W-Mom                | Default Domain        |          90192      |
 | P-Mass               | Default Domain        |          77469      |
 +----------------------+-----------------------+---------------------+
 | H-Energy             | Default Domain        |          84807      |
 +----------------------+-----------------------+---------------------+

 ======================================================================
 |                     False Transient Information                    |
 +--------------------------------------------------------------------+
 |       Equation       |         Type          | Elapsed Pseudo-Time |
 +--------------------------------------------------------------------+
 | U-Mom                | Auto Timescale        |     5.57011E+03     |
 | V-Mom                | Auto Timescale        |     5.57011E+03     |
 | W-Mom                | Auto Timescale        |     5.57011E+03     |
 +----------------------+-----------------------+---------------------+
 | H-Energy             | Auto Timescale        |     5.44570E+03     |
 +----------------------+-----------------------+---------------------+

 +--------------------------------------------------------------------+
 |                     Average Scale Information                      |
 +--------------------------------------------------------------------+

 Domain Name : Default Domain
     Global Length                                         = 9.4249E-02
     Minimum Extent                                        = 1.4000E-02
     Maximum Extent                                        = 9.2000E-01
     Density                                               = 9.9800E+02
     Dynamic Viscosity                                     = 1.0000E-03
     Velocity                                              = 1.1173E-02
     Advection Time                                        = 8.4354E+00
     Reynolds Number                                       = 1.0509E+03
     Thermal Conductivity                                  = 6.0000E-01
     Specific Heat Capacity at Constant Pressure           = 4.1800E+03
     Prandtl Number                                        = 6.9667E+00
     Temperature Range                                     = 2.6492E-01
     Total Extinction Coefficient                          = 3.5109E-09
     Optical Thickness                                     = 3.3090E-10
 +--------------------------------------------------------------------+
 |                     ****** Notice ******                           |
 |  Spectral band contribution to the spectrum is negligible          |
 |  Domain       : Default Domain                                     |
 |  Spectral Band: Vis                                                |
 |  Contribution :  0.60135-153                                       |
 +--------------------------------------------------------------------+
 +--------------------------------------------------------------------+
 |                     ****** Notice ******                           |
 |  Spectral band contribution to the spectrum is negligible          |
 |  Domain       : Default Domain                                     |
 |  Spectral Band: UV                                                 |
 |  Contribution :  0.60135-153                                       |
 +--------------------------------------------------------------------+
 +--------------------------------------------------------------------+
 |                     ****** Notice ******                           |
 |  Spectral band contribution to the spectrum is negligible          |
 |  Domain       : Default Domain                                     |
 |  Spectral Band: NIR                                                |
 |  Contribution :  0.60135-153                                       |
 +--------------------------------------------------------------------+

 +--------------------------------------------------------------------+
 |                     Variable Range Information                     |
 +--------------------------------------------------------------------+

 Domain Name : Default Domain
 +--------------------------------------------------------------------+
 |      Variable Name                         |    min    |    max    |
 +--------------------------------------------------------------------+
 | Density                                    |  9.98E+02 |  9.98E+02 |
 | Specific Heat Capacity at Constant Pressure|  4.18E+03 |  4.18E+03 |
 | Dynamic Viscosity                          |  1.00E-03 |  1.00E-03 |
 | Thermal Conductivity                       |  6.00E-01 |  6.00E-01 |
 | Static Entropy                             | -7.07E+01 | -6.69E+01 |
 | Total Absorption Coefficient               |  3.50E-09 |  3.59E-09 |
 | Total Scattering Coefficient               |  0.00E+00 |  0.00E+00 |
 | Radiation Intensity                        |  2.32E+02 |  2.43E+02 |
 | Vis.Radiation Intensity                    |  0.00E+00 |  1.33E+00 |
 | UV.Radiation Intensity                     |  0.00E+00 |  0.00E+00 |
 | NIR.Radiation Intensity                    |  1.23E+00 |  2.31E+00 |
 | MIR.Radiation Intensity                    |  2.30E+02 |  2.41E+02 |
 | Velocity u                                 |  5.31E-05 |  1.89E-02 |
 | Velocity v                                 | -3.47E-05 |  7.25E-04 |
 | Velocity w                                 | -7.54E-04 |  7.54E-04 |
 | Pressure                                   | -4.79E-07 |  2.72E-01 |
 | Temperature                                |  2.93E+02 |  2.93E+02 |
 | Static Enthalpy                            | -2.09E+04 | -1.98E+04 |
 +--------------------------------------------------------------------+

 +--------------------------------------------------------------------+
 |           CPU Requirements of Numerical Solution - Total           |
 +--------------------------------------------------------------------+

 Subsystem Name                  Discretization       Linear Solution
                                (secs.   %total)     (secs.   %total) 
 ----------------------------------------------------------------------
 Momentum and Mass              1.25E+04  14.2 %     1.18E+03   1.3 %
 Thermal Radiation              8.42E+02   1.0 %     6.84E+04  77.9 %
 Heat Transfer                  2.97E+03   3.4 %     4.00E+02   0.5 %
                                -------- -------     --------  ------
 Subsystem Summary              1.63E+04  18.5 %     7.00E+04  79.7 %

 Variable Updates               1.42E+03    1.6 %
 Search Calculations            4.69E-02    0.0 %
 File Reading                   2.04E+00    0.0 %
 File Writing                   4.18E+00    0.0 %
 Miscellaneous                  1.25E+02    0.1 %
                                --------
 Total                          8.78E+04

 +--------------------------------------------------------------------+
 |                   Job Information at End of Run                    |
 +--------------------------------------------------------------------+

 Job finished:   Fri Apr 01 13:44:28 2016

 Total wall clock time: 2.196E+04 seconds
             or: (          0:         6:         6:     0.684 )
                 (       Days:     Hours:   Minutes:   Seconds )
...
This run of the ANSYS CFX Solver has finished.
Maybe you guys can help me a bit to interpret this results. I'm still a bit unsure about that Normalized Standard Deviation and when it's a good or bad result. I guess, I'm just a bit inexperienced in this things yet.

Would be very thankful for your help!

Last edited by volleyHC; April 3, 2016 at 08:06.
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