# rhoPorousMRFPimpleFoam velocity

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 August 9, 2011, 04:50 rhoPorousMRFPimpleFoam velocity #1 New Member   Raph Raggatt Join Date: Jul 2011 Posts: 9 Rep Power: 6 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

 August 9, 2011, 04:52 Error Code #2 New Member   Raph Raggatt Join Date: Jul 2011 Posts: 9 Rep Power: 6 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:rintStack(Foam::Ostream&) in "/opt/openfoam200/platforms/linuxGccDPOpt/lib/libOpenFOAM.so" #1 Foam::sigFpe::sigHandler(int) in "/opt/openfoam200/platforms/linuxGccDPOpt/lib/libOpenFOAM.so" #2 Uninterpreted: #3 Foam::hPsiThermo > > > >::calculate() in "/opt/openfoam200/platforms/linuxGccDPOpt/lib/libbasicThermophysicalModels.so" #4 Foam::hPsiThermo > > > >::correct() in "/opt/openfoam200/platforms/linuxGccDPOpt/lib/libbasicThermophysicalModels.so" #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\$

 Tags rhoporousmrfpimplefoam

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post ashtonJ CFX 5 July 13, 2015 02:49 Kali Sanjay Phoenics 0 November 6, 2006 07:10 Antech Main CFD Forum 0 April 25, 2006 02:15 Abhi Main CFD Forum 12 July 8, 2002 09:11 chong chee nan FLUENT 0 December 29, 2001 06:13

All times are GMT -4. The time now is 15:49.

 Contact Us - CFD Online - Top