CFD Online Discussion Forums

Installing foam-extend-4.1 from Source (Fedora 36)

Posted August 30, 2022 at 06:13 by elvis

Just a reminder what I did on my Fedora 36
http://https://openfoamwiki.net/inde...oam-extend-4.1

Code:

 dnf install -y  python3-pip m4 flex bison git git-core mercurial cmake cmake-gui openmpi openmpi-devel metis metis-devel metis64 metis64-devel
llvm llvm-devel zlib  zlib-devel  ....

Code:

{
  echo 'export PATH=/usr/local/cuda/bin:$PATH' 
  echo 'module load mpi/openmpi-x86_64' 
}>> ~/.bashrc

...

elvis

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The importance of a good mesh

Posted July 3, 2022 at 03:22 by Vinzmann

Tags meshing, openfoam, snappyhexmesh

Recently I've been running a simulation of a Ranque Hilsch Vortex Tube in OpenFOAM. This went well for a time but when I tried refining and implementing a new mesh, it all came crashing down, showing negative total temperatures with gradients of more than 600 K for neighbouring cells. Since my experience with OpenFOAM is still rather limited, I tried with refining every surface up to a ridiculously high degree. After that mishap I went into it with my head on straight and started looking at what...

Vinzmann

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Regarding collaboration for research work in microchannel heat sink

Posted May 30, 2022 at 12:43 by p.b40

Dear Researchers,
I, Dr. Prabhakar Bhandari looking for an collaborative research in the field of microchannel heat sink. The work is totally numerical simulation based. If any body interested can email me on prabhakar.bhandari40@gmail.com

p.b40

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laplacian(rAU, p) == fvc::div(phiHbyA)?

Posted May 28, 2022 at 17:13 by Mars409

Quote:

Originally Posted by sharonyue

Hi,

In icoFoam's code, we have:

Code:

fvScalarMatrix pEqn
                (
                    fvm::laplacian(rAU, p) == fvc::div(phiHbyA)
                );

Why its not div(HbyA) as of the equation in the image?

This equation is deduced by myself. If it was wrong just correct me.

Though 9 yrs old, this question is worth leaving a note for, bc I will forget.

The argument of fvc::div(phiHbyA)...

Mars409

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2 Easy MPI pieces

Posted May 7, 2022 at 18:03 by sbaffini (NuTBox)
Updated May 9, 2022 at 17:32 by sbaffini

Anyone who has a minimum working experience with MPI (the Message Passing Interface for distributed parallel computing) has certainly had the chance to meet certain coding patterns multiple times, especially if working with a CFD (or any other computational physics like) code.

Regrettably, MPI and parallel distributed computing is one of those areas where textbooks and online examples (even SO) are largely useless, as most (if not all) of them just simply go into the details of how...