[Other] Coflow in cylindrical annular and core

Steven Chew · March 10, 2013, 03:08

Hi all,

As mentioned in the title, I am looking to solve a coflow along a cylinder, with two different fluids in the annulus and the core respectively. The fluids are separated by a thin wall in between and I need to solve for the heat exchange between the fluids.

Coming from external flows background, I am not really sure how to approach this problem in OpenFOAM. My hunch is as such:

1. create 2 rectangular domains and have them transformed into cylindrical coordinates, mapping the inner wall boundary as the common interface

2. specify some thin wall treatment for that common interface boundary.

I have been searching online using keywords like coflow, annular, core, openfoam, cylindrical, but have not been successful in finding cases that are similar to my problem. Would appreciate if I can get some help from here.

Thanks!

Steven Chew · March 12, 2013, 08:09

Hi,

Would really appreciate if someone can provide some clues.

Does OpenFOAM enable solving the governing equations on transformed coordinates in the first place?

Or will I really need to create a cylindrical domain using blockMesh, one centre tube with 4 side arc blocks? I have seen this mesh being used before for cylinder channel flow, but I thought it would be more elegant to use transformation and the boundary conditions might be more direct.

March 10, 2013, 03:08	Coflow in cylindrical annular and core	#1
Steven Chew New Member Steven Chew Join Date: May 2012 Posts: 12 Rep Power: 13	Hi all, As mentioned in the title, I am looking to solve a coflow along a cylinder, with two different fluids in the annulus and the core respectively. The fluids are separated by a thin wall in between and I need to solve for the heat exchange between the fluids. Coming from external flows background, I am not really sure how to approach this problem in OpenFOAM. My hunch is as such: 1. create 2 rectangular domains and have them transformed into cylindrical coordinates, mapping the inner wall boundary as the common interface 2. specify some thin wall treatment for that common interface boundary. I have been searching online using keywords like coflow, annular, core, openfoam, cylindrical, but have not been successful in finding cases that are similar to my problem. Would appreciate if I can get some help from here. Thanks!

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March 12, 2013, 08:09		#2
Steven Chew New Member Steven Chew Join Date: May 2012 Posts: 12 Rep Power: 13	Hi, Would really appreciate if someone can provide some clues. Does OpenFOAM enable solving the governing equations on transformed coordinates in the first place? Or will I really need to create a cylindrical domain using blockMesh, one centre tube with 4 side arc blocks? I have seen this mesh being used before for cylinder channel flow, but I thought it would be more elegant to use transformation and the boundary conditions might be more direct.