Transporting data from patch faces to nearby cells on multiple threads

chriss85 · May 11, 2015, 10:05

I have a rather complex problem in which I have a source term for boundary patch faces that I want to distribute on nearby cells based on the distance between a cell and the patch face. I could do this rather easily on a single thread by iterating through cell neighbours until the distance between cells and patch face gets too large. However, on a decomposed mesh I'm going to hit processor boundaries. Is there any way to access the complete mesh on each core?

I'm also wondering if it is possible to use the meshWave class for this somehow, but I don't completely understand it yet. Can anyone give me some hints on that?

In short: I need to know the distance of cells to patch faces for cells close to the patches for decomposed meshes send data from the patch faces to these cells across processors.

Some context: This is for an ablation model which gives a mass source term at the wall. However, with thin layers at the wall the patch-normal velocity gets too high for reasonable simulation runtimes and so I want to distribute the mass source on near cells to get a lower pressure gradient and velocity.

chriss85 · May 26, 2015, 07:55

No ideas? Is anything unclear?

May 11, 2015, 10:05	Transporting data from patch faces to nearby cells on multiple threads	#1
chriss85 Senior Member Join Date: Oct 2013 Posts: 397 Rep Power: 18	I have a rather complex problem in which I have a source term for boundary patch faces that I want to distribute on nearby cells based on the distance between a cell and the patch face. I could do this rather easily on a single thread by iterating through cell neighbours until the distance between cells and patch face gets too large. However, on a decomposed mesh I'm going to hit processor boundaries. Is there any way to access the complete mesh on each core? I'm also wondering if it is possible to use the meshWave class for this somehow, but I don't completely understand it yet. Can anyone give me some hints on that? In short: I need to know the distance of cells to patch faces for cells close to the patches for decomposed meshes send data from the patch faces to these cells across processors. Some context: This is for an ablation model which gives a mass source term at the wall. However, with thin layers at the wall the patch-normal velocity gets too high for reasonable simulation runtimes and so I want to distribute the mass source on near cells to get a lower pressure gradient and velocity.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[snappyHexMesh] Add Mesh Layers doesnt work on the whole surface	Kryo	OpenFOAM Meshing & Mesh Conversion	13	February 17, 2022 07:34
CFD by anderson, chp 10.... supersonic flow over flat plate	varunjain89	Main CFD Forum	18	May 11, 2018 07:31
[OpenFOAM.org] OF2.3.1 + OS13.2 - Trying to use the dummy Pstream library	aylalisa	OpenFOAM Installation	23	June 15, 2015 14:49
[Gmsh] Import gmsh msh to Foam	adorean	OpenFOAM Meshing & Mesh Conversion	24	April 27, 2005 08:19
Multicomponent fluid	Andrea	CFX	2	October 11, 2004 05:12

May 26, 2015, 07:55		#2
chriss85 Senior Member Join Date: Oct 2013 Posts: 397 Rep Power: 18	No ideas? Is anything unclear?