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-   -   Tube in a tube how to model (http://www.cfd-online.com/Forums/openfoam-meshing-utilities/61567-tube-tube-how-model.html)

tufty June 4, 2007 12:17

Hi. After successfully playin
 
Hi. After successfully playing with OpenFOAM for a couple of 2d decompositions of my problem domain, I now want to go for a fully-3d approach.

The model in question is relatively complex, featuring:

An enclosed "pot" (basically, a cylinder with one closed end and a tapered cylinder open to the atmosphere "stuck on" the other end. this much is easy enough to model using the "classic" square core and 4 segments approach.

"Free floating" inside the pot, with both ends open (i.e not touching either end), a baffle, with its exterior a tapered cylinder and the interior "streamlined". this is a 3d structure, not a simple 2d baffle, if that matters.

I figured I could extend the "square core with 4 segments" to "square core with 4 segments and an additional 4 segments", but it seems to be causing problems with the "interior" arc segments, blockMesh seems to think the arc points are colinear.

Is this a known problem, and if so, does anyone have any ideas as to how I could solve it?

Simon

tufty June 5, 2007 08:29

Here's a snapshot of the pot a
 
Here's a snapshot of the pot as modelled in gmsh (not, I might add, as I was trying to do things, the msh file itself doesn't want to import)

http://www.cfd-online.com/OpenFOAM_D...ges/1/4615.jpg

tufty June 5, 2007 10:57

Meh. Forget it. I managed to
 
Meh. Forget it. I managed to get gmsh to export an mesh gmshToFoam liked by - ahem - remembering to name my volumes as well as my surfaces.

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

Simon


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