# Problem when starting rhoSimpleFoam

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 September 19, 2022, 21:51 Problem when starting rhoSimpleFoam #1 New Member   Six Chen Join Date: Sep 2022 Posts: 1 Rep Power: 0 Hello everyone I am a beginner of OpenFoam, when I try to run the simulation of a Axisymmetric Near-Sonic Jet from NASA (LINK: https://turbmodels.larc.nasa.gov/jetnearsonic_val.html). The simulation always stops right after it starts: --> FOAM Warning : From function virtual void Foam::wedgePolyPatch::calcGeometry(Foam::PstreamBu ffers&) in file meshes/polyMesh/polyPatches/constraint/wedge/wedgePolyPatch.C at line 70 Wedge patch 'wedgeBack' is not planar. At local face at (-0.150876 0.108539 -0.000947207) the normal (0 -0.00872654 -0.999962) differs from the average normal (-5.51924e-09 -0.00872661 -0.999962) by 5.84762e-15 Either correct the patch or split it into planar parts SIMPLE: Convergence criteria found p: tolerance 0.0001 U: tolerance 0.0001 "(k|epsilon|omega)": tolerance 0.001 Reading thermophysical properties Selecting thermodynamics package { type hePsiThermo; mixture pureMixture; transport sutherland; thermo hConst; equationOfState perfectGas; specie specie; energy sensibleInternalEnergy; } Reading field U Reading/calculating face flux field phi Creating turbulence model Selecting turbulence model type RAS Selecting RAS turbulence model kEpsilon RAS { model kEpsilon; turbulence on; printCoeffs on; Cmu 0.09; C1 1.44; C2 1.92; C3 0; sigmak 1; sigmaEps 1.3; } Creating thermophysical transport model Selecting thermophysical transport type RAS Selecting default RAS thermophysical transport model unityLewisEddyDiffusivity No MRF models present No fvModels present Creating fvConstraints from "system/fvConstraints" Selecting finite volume constraint type limitPressure Name: limitp min 10132.5 max 358275 Starting time loop Time = 0.01s DILUPBiCGStab: Solving for Ux, Initial residual = 1, Final residual = 0.0877972, No Iterations 26 DILUPBiCGStab: Solving for Uy, Initial residual = 1, Final residual = 0.0445231, No Iterations 1 DILUPBiCGStab: Solving for Uz, Initial residual = 1, Final residual = 0.090669, No Iterations 3 DILUPBiCGStab: Solving for e, Initial residual = 0.562846, Final residual = 0.0444755, No Iterations 3 GAMG: Solving for p, Initial residual = 1, Final residual = 0.0827434, No Iterations 4 GAMG: Solving for p, Initial residual = 1.13893e-05, Final residual = 5.80668e-07, No Iterations 3 time step continuity errors : sum local = 0.0580252, global = -0.0253458, cumulative = -0.0253458 DILUPBiCGStab: Solving for epsilon, Initial residual = 0.854138, Final residual = 0.00951507, No Iterations 17 bounding epsilon, min: -7940.89 max: 2.52748e+08 average: 3.93132e+07 DILUPBiCGStab: Solving for k, Initial residual = 1, Final residual = 0.0640378, No Iterations 2 bounding k, min: -10.2461 max: 2.16176e+07 average: 411444 ExecutionTime = 1.04329 s ClockTime = 4 s Time = 0.02s DILUPBiCGStab: Solving for Ux, Initial residual = 0.995904, Final residual = 0.00997181, No Iterations 1 DILUPBiCGStab: Solving for Uy, Initial residual = 0.999948, Final residual = 0.0612613, No Iterations 1 DILUPBiCGStab: Solving for Uz, Initial residual = 0.894813, Final residual = 0.0781122, No Iterations 1 DILUPBiCGStab: Solving for e, Initial residual = 0.820998, Final residual = 1.8519, No Iterations 1000 #0 Foam::error:rintStack(Foam::Ostream&) at ??:? #1 Foam::sigFpe::sigHandler(int) at ??:? #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" #3 ? in "/lib/x86_64-linux-gnu/libm.so.6" #4 Foam::hePsiThermo >, Foam::sensibleInternalEnergy> > > >::calculate() at ??:? #5 virtual thunk to Foam::hePsiThermo >, Foam::sensibleInternalEnergy> > > >::correct() at ??:? #6 ? in "/opt/openfoam10/platforms/linux64GccDPInt32Opt/bin/rhoSimpleFoam" #7 ? in "/lib/x86_64-linux-gnu/libc.so.6" #8 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #9 ? in "/opt/openfoam10/platforms/linux64GccDPInt32Opt/bin/rhoSimpleFoam" It would be great if someone could tell me what exactly the problem is and how should I make the change. Thank you so much.

 September 20, 2022, 06:53 #2 Senior Member   Domenico Lahaye Join Date: Dec 2013 Posts: 517 Blog Entries: 1 Rep Power: 14 Seems that temperature reaches unrealistic high values (judging from error message). Suggest to: 1/ limit temperature. Search this forum on how to; 2/ replace rhoSimpleFoam (stationary) with rhoPimpleFoam (transient). Check whether using smaller time steps works out; 3/ use finer mesh; Good luck.

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