[adarsh tiwari]

Dear All,

Sorry for the new thread.

I have a mesh for shell and tube heat exchangers in *.msh format. I have imported this to OpenFOAM 231.
all the walls are having zero thickness. With some literature survey, i learned, chtMultiRegionSimpleFoam will be of suitable for this case. I have searched the forum and some links on google, but unfortunately not got any satisfactory answers.

http://www.cfd-online.com/Forums/openfoam-pre-processing/126581-chtmultiregionsimplefoam-tutorial-heatexchanger.html
http://www.cfd-online.com/Forums/openfoam-solving/164200-using-functionobjects-chtmultiregionsimplefoam.html
http://www.cfd-online.com/Forums/openfoam-paraview/121666-post-processing-heatexchanger-chtmultiregionsimplefoam.html
http://www.cfd-online.com/Forums/openfoam-solving/126777-chtmultiregionsimplefoam-heat-source-not-boundary.html

 http://www.tfd.chalmers.se/~hani/kurser/OS_CFD_2012/MaaikeVanDerTempel/chtMultiRegionSimpleBoussinesqFoam7.pdf
http://www.tfd.chalmers.se/~hani/kurser/OS_CFD_2010/alirezaJavidi/alirezaReport.pdf

I am looking for the step-by-step explained tutorial for chtMultiRegionSimpleFoam/heatExchanger

Kindly help me in simulating this custom made shell and tube heat exchanger.

Thanks in advance.
With best regards,
Adarsh

[zfaraday]

Hi Adarsh,

My recomendation, if your goal is to learn to set up a chtMultiRegion*Foam case, is to take a strong look at the planeWall2D tutorial. There you will find the answers to all your questions about this solver! After that you will be able to understand what is behind the heatExchanger tutorial.

Hope it helps.

Best regards,

Alex

[dewey]

Hi, did you find some tutorial about this?

[Tobi]

I just can suggest the one I made on www.holzmann-cfd.de
The tutorial mentioned in the wiki page is not working properly. Bruno already told me to fix it but it is not as trivial as one thinks and to be honest, there is no time

[dewey]

Originally Posted by Tobi

I just can suggest the one I made on www.holzmann-cfd.de
The tutorial mentioned in the wiki page is not working properly. Bruno already told me to fix it but it is not as trivial as one thinks and to be honest, there is no time

Thanks Tobias.

Could you help me with something?

When i run the heatExchanger simulation tutorial and finished, I tried to open the results and i got this error:



terofluidos@Cascabel:~/Documentos/openfoam/tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger$ paraFoam
ERROR: In /home/ubuntu/OpenFOAM/OpenFOAM-4.1/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/PVFoamReader/vtkPVFoamReader.cxx, line 216
vtkPVFoamReader (0x37d0b10): could not find valid OpenFOAM mesh


ERROR: In /home/openfoam/OpenFOAM/ParaView-5.0.1/VTK/Common/ExecutionModel/vtkExecutive.cxx, line 784
vtkPVCompositeDataPipeline (0x212cd60): Algorithm vtkPVFoamReader(0x37d0b10) returned failure for request: vtkInformation (0x37d1980)
Debug: Off
Modified Time: 162970
Reference Count: 1
Registered Events: (none)
Request: REQUEST_INFORMATION
ALGORITHM_AFTER_FORWARD: 1
FORWARD_DIRECTION: 0




ERROR: In /home/ubuntu/OpenFOAM/OpenFOAM-4.1/applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/PVFoamReader/vtkPVFoamReader.cxx, line 216
vtkPVFoamReader (0x37d0b10): could not find valid OpenFOAM mesh


ERROR: In /home/openfoam/OpenFOAM/ParaView-5.0.1/VTK/Common/ExecutionModel/vtkExecutive.cxx, line 784
vtkPVCompositeDataPipeline (0x212cd60): Algorithm vtkPVFoamReader(0x37d0b10) returned failure for request: vtkInformation (0x37d1980)
Debug: Off
Modified Time: 162970
Reference Count: 1
Registered Events: (none)
Request: REQUEST_INFORMATION
ALGORITHM_AFTER_FORWARD: 1
FORWARD_DIRECTION: 0

[dewey]

Originally Posted by Tobi

I just can suggest the one I made on www.holzmann-cfd.de
The tutorial mentioned in the wiki page is not working properly. Bruno already told me to fix it but it is not as trivial as one thinks and to be honest, there is no time

The same happens when i run your simulation conjugatedHeatTransferGinTonic or when i try to run any other with this solver.

is there something that i am ommitting?

Thank you for your time.

[Tobi]

What is if you make a empty file named paraview.foam and load paraview and load that file? Does the same error occur? Did the solver finished without any problems? Sometimes I have the problem that I abort a simulation while it was writing results. Then the result files are destroyed and I have to remove the latest one.

[dewey]

Forget it! I could find the solution.

I was writing only the command paraFoam instance of paraFoam -builtin.

But thank you for all the tutorials!

[dewey]

Hi tobi, sorry to bother you


I want to simulate flow through one pipe, with two obstacles, this obstacles are inmersed like in the figure.

1.- I export with .msh

2.- splitMeshRegions -cellZones -overwrite (fluid, porosity, solid)

i got this :

porosity_to_part_4-solid
{
type mappedWall;
inGroups 1(wall);
nFaces 24192;
startFace 1479713;
sampleMode nearestPatchFace;
sampleRegion part_4-solid;
samplePatch part_4-solid_to_porosity;
}



This separate my three domains, but the interior faces of my porosity became into wall. I want the fluid flow through the porous media. how can i fix this?

In the heatexchanger tutorial they consider walls in the porous medium.

Thank you.