Hi to all, I have a flow with
 

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.

check out rhoSimpleFoam. th
 

check out rhoSimpleFoam.

this will be what you are looking for.

Regards

Shaun.D

Thanks Shaun. I have a problem
 

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.

You just have to set up the ca
 

You just have to set up the case by hand without FoamX.

Hi, I also want to know how
 

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.

look at these tutorials: rhoE
 

look at these tutorials:
rhoExplicitPorousSimpleFoam
rhoImplicitPorousSimpleFoam
they use rhoSimpleFoam solver

you could also simple search t
 

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

Hi, thanks, I think, I will
 

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

Hi to all, I set up a simple
 

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:http://www.cfd-online.com/OpenFOAM_D...part/proud.gifstream&) 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

Hi, can you give me your em
 

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

Hi, can anybody send me the
 

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

Hi Marco I think you want t
 

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

Hi Marco, when you save the
 

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 http://www.cfd-online.com/OpenFOAM_D...part/happy.gif

Regards

Francesco

Thanks Francesco and Cedric,
 

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:http://www.cfd-online.com/OpenFOAM_D...part/proud.gifstream&)
#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

Hi, maybe you have to chang
 

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

Hi Marco, I think it could
 

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

Hi, with my old post I want
 

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

Hi Thomas, FoamX doesn't wo
 

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

Hi Francesco, maybe you are
 

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:http://www.cfd-online.com/OpenFOAM_D...part/proud.gifstream&)
#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

Hi Marco, can you give me y
 

Hi Marco,

can you give me your email? I will send you my files.

Bye