Mesh generation error on Therm 7.6

[Gene Keeton]

I am new to the world of Therm but I think I have been modeling this condition correctly.  However, I get the following message when I try to run the calculation.

"Mesh generation error.  Try simplifying the geometry near point (998.8,286.1) or try increasing the Quad Tree Mesh Parameter in Therm File Options."

The area is a filled frame cavity and the point is in the middle of the cavity.  I have tried changing the Quad Tree Mesh parameter under Options, Preferences but that hasn't changed anything.

Any suggestions?

Thank you,

Gene

[Robin Mitchell]

Gene

I will take a look at your file. The program doesn't always point to the correct place where the problem is, but it is generally going to be in a place where there is a lot of fine detail, possibly with highly conductive materials. 

I will let you know what I find.

Robin 

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Robin Mitchell
Building Technology and Urban Systems Department
Environmental Energy Technologies Division
Lawrence Berkeley National Laboratory

[Robin Mitchell]

One more question -- what version of THERM are you running?

Robin 

On Mon, May 7, 2018 at 11:45 AM, Gene Keeton <ge...@kdentinc.com> wrote:

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[Robin Mitchell]

Never mind, I see in the subject line it's THERM 7.6

On Mon, May 7, 2018 at 11:45 AM, Gene Keeton <ge...@kdentinc.com> wrote:

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[Robin Mitchell/LBNL]

Gene

You had your mesh parameter setting very low, at 3. All I had to do was to change it to 8 and the model simulates. You can access this setting through the Options menu, Preferences menu option.

I did find this odd polygon before I discovered the Mesh Parameter setting, and was going to recommend combining it with the polygon next to it, but increasing the mesh parameter did the trick so you don't even need to make this change to the model. But for future reference, thin polygons with unnecessary points, as well as very small or thin frame cavities, can sometimes give the mesher trouble. 

Robin