|
[Sponsors] |
![]() |
![]() |
#1 |
New Member
kamil
Join Date: Jun 2014
Posts: 11
Rep Power: 12 ![]() |
I'm solving simple case with flow in сoaxial circular tube, and found one strange problem.
The problem is that rho field is constant and equals 1 everywhere except walls. Although using equation of state density must be near 1.12. Solver is rhoSimplecFoam. fvSolution: Code:
solvers { p { solver GAMG; tolerance 1e-08; relTol 0.1; smoother GaussSeidel; nPreSweeps 0; nPostSweeps 2; nFinestSweeps 2; cacheAgglomeration true; nCellsInCoarsestLevel 20; agglomerator faceAreaPair; mergeLevels 1; } "(U|h|k|epsilon)" { solver GAMG; tolerance 1e-08; relTol 0.1; smoother GaussSeidel; nPreSweeps 0; nPostSweeps 2; nFinestSweeps 2; cacheAgglomeration true; nCellsInCoarsestLevel 20; agglomerator faceAreaPair; mergeLevels 1; } } SIMPLE { nNonOrthogonalCorrectors 0; rhoMin rhoMin [1 -3 0 0 0] 0.1; rhoMax rhoMax [1 -3 0 0 0] 1.0; transonic no; } relaxationFactors { fields { p 1; rho 1; } equations { U 0.9; h 0.8; k 0.9; epsilon 0.9; } } Code:
thermoType hPsiThermo<pureMixture<sutherlandTransport<specieThermo<hConstThermo<perfectGas>>>>>; mixture { specie { nMoles 1; molWeight 28.9; } thermodynamics { Cp 1007; Hf 0; } transport { As 1.4792e-06; Ts 116; } } P. S. Sorry for my English. Last edited by zaripov; July 2, 2014 at 12:32. |
|
![]() |
![]() |
![]() |
![]() |
#2 |
Senior Member
Nima Samkhaniani
Join Date: Sep 2009
Location: Tehran, Iran
Posts: 1,266
Blog Entries: 1
Rep Power: 24 ![]() |
well in fvSolution you defined the min and max of density
![]() ![]()
__________________
My Personal Website (http://nimasamkhaniani.ir/) Telegram channel (https://t.me/cfd_foam) |
|
![]() |
![]() |
![]() |
![]() |
#3 |
New Member
kamil
Join Date: Jun 2014
Posts: 11
Rep Power: 12 ![]() |
||
![]() |
![]() |
![]() |
Tags |
density, rho, rhosimplecfoam |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
writing execFlowFunctionObjects | immortality | OpenFOAM Post-Processing | 30 | September 15, 2013 06:16 |
what does this verbose error mean? | immortality | OpenFOAM Running, Solving & CFD | 1 | February 6, 2013 16:47 |
pisoFoam with k-epsilon turb blows up - Some questions | Heroic | OpenFOAM Running, Solving & CFD | 26 | December 17, 2012 03:34 |
Error while running rhoPisoFoam.. | nileshjrane | OpenFOAM Running, Solving & CFD | 8 | August 26, 2010 12:50 |
Error log | vw.cfd | OpenFOAM | 6 | August 7, 2009 05:44 |