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February 15, 2008, 09:38 |
Hi to all,
I have a flow with
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#1 |
Guest
Posts: n/a
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Hi to all,
I have a flow with Mach=0.3. I'm needing a steady state solver for compressible flow, but in the user guide there aren't any solver for steady state case. Can anyone help me? Matteo. |
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February 15, 2008, 18:09 |
check out rhoSimpleFoam.
th
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#2 |
Member
Shaun Darmody
Join Date: Mar 2009
Posts: 36
Rep Power: 17 |
check out rhoSimpleFoam.
this will be what you are looking for. Regards Shaun.D |
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February 18, 2008, 10:00 |
Thanks Shaun. I have a problem
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#3 |
Guest
Posts: n/a
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Thanks Shaun. I have a problem. This solver is not present in FoamX and in the tutorials folder. I have to compile rhoSimpleFoam or I've done some errors in the installation procedure?
Regards, Matteo. |
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February 19, 2008, 04:24 |
You just have to set up the ca
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#4 |
New Member
Maximilian Graser
Join Date: Mar 2009
Location: Stuttgart, Germany
Posts: 18
Rep Power: 17 |
You just have to set up the case by hand without FoamX.
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February 19, 2008, 04:37 |
Hi,
I also want to know how
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#5 |
Guest
Posts: n/a
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Hi,
I also want to know how I can set up the case by hand. Can somebody give me an example for this solver please. |
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February 19, 2008, 04:56 |
look at these tutorials:
rhoE
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#6 |
New Member
Maximilian Graser
Join Date: Mar 2009
Location: Stuttgart, Germany
Posts: 18
Rep Power: 17 |
look at these tutorials:
rhoExplicitPorousSimpleFoam rhoImplicitPorousSimpleFoam they use rhoSimpleFoam solver |
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February 19, 2008, 07:37 |
you could also simple search t
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#7 |
Member
Shaun Darmody
Join Date: Mar 2009
Posts: 36
Rep Power: 17 |
you could also simple search the forum for "rhoSimpleFoam" and you will find some references to case setup.
I believe I can post the case setup tomorrow when at work. Shaun.D |
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February 19, 2008, 07:59 |
Hi,
thanks, I think, I will
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#8 |
Guest
Posts: n/a
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Hi,
thanks, I think, I will try to change the case "rhoImplicitPorousSimpleFoam" solver to "rhoSimpleFoam". In the forum I found this information: "I have tried to create a FoamX configuration for rhoSimpleFoam. Just untar it under $FOAM_SOLVERS/rhoSimpleFoam which will give you the directory FoamX with all the files needed for your first steps with rhoSimpleFoam." I also will try it out today. I hope it is working under version 1.4.1 :-) Thanks a lot |
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February 26, 2008, 07:47 |
Hi to all,
I set up a simple
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#9 |
Guest
Posts: n/a
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Hi to all,
I set up a simple case to understand what rhoSimpleFoam. In the forum I found a discussion where they said that to set up the case I had work with rhoTurbFoam. So I set up the case with rhoTurbFoam and the I modified the fvSolution and fvSchemes dictionary with the corresponding file present in simpleFoam. When I run the case I receive this error message: Reading thermophysical properties Selecting thermodynamics package hThermo<puremixture<consttransport<speciethermo<hc onstthermo<perfectgas>>>>> #0 Foam::error::printStack(Foam:stream&) in "/home/gauta/OpenFOAM/OpenFOAM-1.4.1/lib/linuxGccDPOpt/libOpenFOAM.so" #1 Foam::sigFpe::sigFpeHandler(int) in "/home/gauta/OpenFOAM/OpenFOAM-1.4.1/lib/linuxGccDPOpt/libOpenFOAM.so" #2 Uninterpreted: [0xffffe420] #3 Foam::hThermo<foam::puremixture<foam::consttranspo rt<foam::speciethermo<foam::hc onstthermo<foam::perfectgas> > > > >::calculate() in "/home/gauta/OpenFOAM/OpenFOAM-1.4.1/lib/linuxGccDPOpt/libbasicThermophysicalMod els.so" #4 Foam::hThermo<foam::puremixture<foam::consttranspo rt<foam::speciethermo<foam::hc onstthermo<foam::perfectgas> > > > >::hThermo(Foam::fvMesh const&) in "/home/gauta/OpenFOAM/OpenFOAM-1.4.1/lib/linuxGccDPOpt/libbasicThermophysicalMod els.so" #5 Foam::basicThermo::addfvMeshConstructorToTable<foa m::hthermo<foam::puremixture<f oam::consttransport<foam::speciethermo<foam::hcons tthermo<foam::perfectgas> > > > > >::New(Foam::fvMesh const&) in "/home/gauta/OpenFOAM/OpenFOAM-1.4.1/lib/linuxGccDPOpt/libbasicThermophysicalMod els.so" #6 Foam::basicThermo::New(Foam::fvMesh const&) in "/home/gauta/OpenFOAM/OpenFOAM-1.4.1/lib/linuxGccDPOpt/libbasicThermophysicalMod els.so" #7 main in "/home/gauta/OpenFOAM/OpenFOAM-1.4.1/applications/bin/linuxGccDPOpt/rhoSimpleFoa m" #8 __libc_start_main in "/lib/tls/i686/cmov/libc.so.6" #9 Foam::regIOobject::readIfModified() in "/home/gauta/OpenFOAM/OpenFOAM-1.4.1/applications/bin/linuxGccDPOpt/rhoSimpleFoa m" Floating point exception (core dumped) Can anyone help me? Thanks |
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February 26, 2008, 08:02 |
Hi,
can you give me your em
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#10 |
Guest
Posts: n/a
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Hi,
can you give me your email? I can send you a file. Just untar it under $FOAM_SOLVERS/compressible/rhoSimpleFoam which will give you the directory FoamX with all the files needed for your first steps with rhoSimpleFoam. I found it in this forum. Bye |
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March 3, 2008, 12:14 |
Hi,
can anybody send me the
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#11 |
New Member
Marco Zardetto
Join Date: Mar 2009
Location: Italy
Posts: 6
Rep Power: 17 |
Hi,
can anybody send me the file that I have to untar in the $FOAM_SOLVERS/compressible/rhoSimpleFoam directory in order to use the rhoSimpleFoam solver in FoamX? The file I found in the forum (rhoSimpleFoam_FoamX.tar.gz)is a .unk file... I don't know how to use it. Or anybody can send me an example to compile correctly the files (fvSolution, fvSchemes...) with this solver? Thanks Bye |
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March 3, 2008, 12:23 |
Hi Marco
I think you want t
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#12 |
Senior Member
Cedric DUPRAT
Join Date: Mar 2009
Location: Nantes, France
Posts: 195
Rep Power: 17 |
Hi Marco
I think you want to do something like that: 1- mv rhoSimpleFoam_FoamX.unk rhoSimpleFoam_FoamX.tar.gz 2- gunzip rhoSimpleFoam_FoamX.tar.gz 3- tar -xvf rhoSimpleFoam_FoamX.tar and, I think you should get what you want :o) Cedric |
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March 3, 2008, 12:23 |
Hi Marco,
when you save the
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#13 |
Member
Francesco Boschetto
Join Date: Mar 2009
Location: Italy
Posts: 56
Rep Power: 17 |
Hi Marco,
when you save the file, simply rename it rhoSimpleFoam_FoamX.tar.gz and you'll download the correct file. Then extract it and start to play Regards Francesco |
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March 3, 2008, 13:51 |
Thanks Francesco and Cedric,
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#14 |
New Member
Marco Zardetto
Join Date: Mar 2009
Location: Italy
Posts: 6
Rep Power: 17 |
Thanks Francesco and Cedric,
you are right. Now the solver is in FoamX but it gives error creating a new case! Probably there are some errors in the file. I'm sorry but I'm new to OpenFoam... Anyhow I've to study a compressible air flow in steady state. I started from rhoturbFoam solver and than I modified manually some files. When the simulation starts it plots this errors: Exec : rhoSimpleFoam . v990_prova Date : Mar 03 2008 Time : 18:22:51 Host : computer-marco PID : 6983 Root : /home/simulation/OpenFOAM/simulation-1.4/run/tutorials/rhoTurbFoam Case : v990_prova Nprocs : 1 Create time Create mesh for time = 0 Reading thermophysical properties Selecting thermodynamics package hThermo<puremixture<consttransport<speciethermo<hc onstthermo<perfectgas>>>>> #0 Foam::error::printStack(Foam:stream&) #1 Foam::sigFpe::sigFpeHandler(int) #2 Uninterpreted: [0xffffe420] #3 Foam::hThermo<foam::puremixture<foam::consttranspo rt<foam::speciethermo<foam::hc onstthermo<foam::perfectgas> > > > >::calculate() #4 Foam::hThermo<foam::puremixture<foam::consttranspo rt<foam::speciethermo<foam::hc onstthermo<foam::perfectgas> > > > >::hThermo(Foam::fvMesh const&) #5 Foam::basicThermo::addfvMeshConstructorToTable<foa m::hthermo<foam::puremixture<f oam::consttransport<foam::speciethermo<foam::hcons tthermo<foam::perfectgas> > > > > >::New(Foam::fvMesh const&) #6 Foam::basicThermo::New(Foam::fvMesh const&) #7 main #8 __libc_start_main #9 __gxx_personality_v0 at /usr/src/packages/BUILD/glibc-2.3/csu/../sysdeps/i386/elf/start.S:122 Floating point exception (core dumped) What does it mean? How can I find the errors? Thanks Bye |
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March 4, 2008, 04:15 |
Hi,
maybe you have to chang
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#15 |
Senior Member
Tian
Join Date: Mar 2009
Location: Berlin, germany
Posts: 122
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Hi,
maybe you have to change the fvScheme in "FoamX/defaults/system/" folder? laplacian((rho*(1|A(U))),p) Gauss linear corrected I am not sure it is the reason... bye
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March 4, 2008, 04:43 |
Hi Marco,
I think it could
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#16 |
Member
Francesco Boschetto
Join Date: Mar 2009
Location: Italy
Posts: 56
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Hi Marco,
I think it could be a BC problem, can you tell us which is your set of BC? Which changes did you make in the code? Regards Francesco |
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March 4, 2008, 05:04 |
Hi,
with my old post I want
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#17 |
Senior Member
Tian
Join Date: Mar 2009
Location: Berlin, germany
Posts: 122
Rep Power: 17 |
Hi,
with my old post I want to tell about you have to change the file fvScheme that you can open it in FoamX without error. Bye
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BIM HVACTool, The Green Building Simulation Tool for OpenFOAM, Energy Plus and Radiance. |
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March 4, 2008, 07:00 |
Hi Thomas,
FoamX doesn't wo
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#18 |
New Member
Marco Zardetto
Join Date: Mar 2009
Location: Italy
Posts: 6
Rep Power: 17 |
Hi Thomas,
FoamX doesn't work in spite of the change. Maybe other changes are necessary and I tried to do them, but nothing.... The error, when I create the new case, is this: class org.omg.CORBA.UNKNOWN Thanks anyway |
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March 4, 2008, 07:05 |
Hi Francesco,
maybe you are
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#19 |
New Member
Marco Zardetto
Join Date: Mar 2009
Location: Italy
Posts: 6
Rep Power: 17 |
Hi Francesco,
maybe you are right, I modified the BC and the simulation starts but now it stops here: Starting time loop Time = 0.05 DILUPBiCG: Solving for Ux, Initial residual = 1, Final residual = 9.71047e-06, No Iterations 5 DILUPBiCG: Solving for Uy, Initial residual = 1, Final residual = 9.14451e-06, No Iterations 5 DILUPBiCG: Solving for Uz, Initial residual = 1, Final residual = 2.265e-06, No Iterations 6 #0 Foam::error::printStack(Foam:stream&) #1 Foam::sigFpe::sigFpeHandler(int) ... #14 __gxx_personality_v0 at /usr/src/packages/BUILD/glibc-2.3/csu/../sysdeps/i386/elf/start.S:122 Floating point exception (core dumped) This is my problem, I think it is not difficult to solve but I'm not able: I have an air duct with an inlet section and an outlet section. The motion is produced by a delta p between the two sections. Flow is compressible, turbulent and steady. These are some of the changes I made to modify rhoTurbFoam solver: application rhoSimpleFoam (in contolDict file) ddtSchemes steadyState (in fvSchemes file) SIMPLE (in fvSolution file) Honestly I don't know how to put all the BC at time 0 (R, k, epsilon?). Do you think the mistake is here? Or in the solution for p? These are the BC I put: U=0 on the wall, zeroGradient on inlet and outlet p=fixedValue on inlet and outlet, zeroGradient on the wall k, epsilon, R, T zeroGradient (and internalField ?) Please can you help me? Thanks |
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March 4, 2008, 07:15 |
Hi Marco,
can you give me y
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#20 |
Senior Member
Tian
Join Date: Mar 2009
Location: Berlin, germany
Posts: 122
Rep Power: 17 |
Hi Marco,
can you give me your email? I will send you my files. Bye
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BIM HVACTool, The Green Building Simulation Tool for OpenFOAM, Energy Plus and Radiance. |
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