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volleyHC March 31, 2016 03:44

Monte Carlo Simulation: H-Energy is not convergating & high Incident Radiation
 
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:
http://up.picr.de/25044997ud.jpg

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!

ghorrocks March 31, 2016 09:12

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.

volleyHC March 31, 2016 10:01

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!

Opaque March 31, 2016 11:10

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,

volleyHC March 31, 2016 14:16

Thanks for you answer. I will have a look and give some feedback later.

Quote:

Originally Posted by Opaque (Post 592665)
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.

volleyHC April 3, 2016 06:41

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

http://up.picr.de/25079344rs.jpghttp://up.picr.de/25079345ip.jpg

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!


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