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Monte Carlo Simulation: H-Energy is not convergating & high Incident Radiation |
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March 31, 2016, 02:44
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Monte Carlo Simulation: H-Energy is not convergating & high Incident Radiation
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#1 |
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New Member
Join Date: Apr 2015
Posts: 10
Rep Power: 10  |
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:
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
Last edited by volleyHC; March 31, 2016 at 13:22. |
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March 31, 2016, 08:12
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#2 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,700
Rep Power: 143 |
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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March 31, 2016, 09:01
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#3 |
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New Member
Join Date: Apr 2015
Posts: 10
Rep Power: 10 |
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 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 |
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March 31, 2016, 10:10
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#4 |
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Senior Member
Join Date: Jun 2009
Posts: 1,803
Rep Power: 32 |
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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March 31, 2016, 13:16
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#5 | |
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New Member
Join Date: Apr 2015
Posts: 10
Rep Power: 10 |
Thanks for you answer. I will have a look and give some feedback later.
Quote:
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April 3, 2016, 05:41
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#6 |
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New Member
Join Date: Apr 2015
Posts: 10
Rep Power: 10 |
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.
Would be very thankful for your help! Last edited by volleyHC; April 3, 2016 at 07:06. |
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Linear Mode
