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#1 |
New Member
Raph Raggatt
Join Date: Jul 2011
Posts: 9
Rep Power: 15 ![]() |
Hi there,
I am using the rhoPorousMRFPimpleFoam solver for my base case however I am having problems with the output, getting increases in velocity and pressure when I should be getting the opposite. I have included the temperature equation into the solver. The details are: - Mesh imported from Salome with 5 meshes joined together in a compound mesh. - Each boundary is specified, eg inlet, wall, regionCouple, etc - Two porous regions either side of the inlet channel - Inlet velocity of 30 m/s. Inlet temp of 700K - the model should run by air flowing through the inlet at 700K, 30m/s, passing through and heating up the porous zones on either side of the inlet duct leaving the outlets on either side at a lower temperature. The problems are several: - The time scale I can reach is of the order 1e-4 s when really it should be of the order 1e3 s. - The velocity increases rapidly to 267m/s at certain regions - why? - The pressure increases from 1 bar to 1.5 bar - The flow doesn't go from the inlet to the outlet through the porous zones. If anyone could give any hints as to whether it's the fvschemes, solutions or solver I need to look at, I would be really grateful. Regards, Rapha |
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#2 |
New Member
Raph Raggatt
Join Date: Jul 2011
Posts: 9
Rep Power: 15 ![]() |
This is the error code which I get for the last iteration:
Courant Number mean: 0.0166694 max: 0.605291 deltaT = 1.8885e-07 Time = 0.000333925 diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0 DILUPBiCG: Solving for Ux, Initial residual = 0.0115056, Final residual = 4.09179e-06, No Iterations 1 DILUPBiCG: Solving for Uy, Initial residual = 0.0112349, Final residual = 3.55671e-06, No Iterations 1 DILUPBiCG: Solving for h, Initial residual = 0.278506, Final residual = 1.42709e-07, No Iterations 2 #0 Foam::error: ![]() #1 Foam::sigFpe::sigHandler(int) in "/opt/openfoam200/platforms/linuxGccDPOpt/lib/libOpenFOAM.so" #2 Uninterpreted: #3 Foam::hPsiThermo<Foam: ![]() ![]() #4 Foam::hPsiThermo<Foam: ![]() ![]() #5 in "/opt/openfoam200/platforms/linuxGccDPOpt/bin/HTTESS_Solver_P" #6 __libc_start_main in "/lib/tls/i686/cmov/libc.so.6" #7 in "/opt/openfoam200/platforms/linuxGccDPOpt/bin/HTTESS_Solver_P" Floating point exception ra@ubuntu:~/OpenFOAM/ra-2.0.0/run/3_08/HTTESS$ |
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rhoporousmrfpimplefoam |
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