Same case with smaller Geometry leads to Floating Point Exception

Clau.77 · July 5, 2021, 10:34

Hey Guys!

my case:

- OF-8
- chtMultiRegionFoam
- geometry surrounded by air

I have attached a little sketch of my geometry. So first of all, I am managing to simulate the whole geometry.

Now I would like to cut my Geometry in half (where you see the red line). So everything stays else stays the same and I only make the blockMesh in the y-direction a bit smaller. But when I try to run the case I am always getting the floating Point Exception error (i have also attached a snapshot of that).

Does anyone have an idea why this happens?

Ship Designer · July 5, 2021, 16:00

Maybe if you cut the mesh at the interior some of the boundary conditions need to be adjusted. Is that final residual for h with an exponent of -54 a typical value in your experience? Are you doing a calculation about chocolate? 🍫😋

Clau.77 · July 6, 2021, 04:28

Yes, i am working with chocolate for my master thesis

The boundaries should stay the same. I also tried using different boundaries but that didn't help.

I thought the value for h is pretty low too, but when I m using the whole geometry, I also get values like e-53, but it runs nevertheless... and I actually wouldn't know what to do to get a higher value.

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July 5, 2021, 16:00		#2
Ship Designer Senior Member Claudio Boezio Join Date: May 2020 Location: Europe Posts: 137 Rep Power: 8	Maybe if you cut the mesh at the interior some of the boundary conditions need to be adjusted. Is that final residual for h with an exponent of -54 a typical value in your experience? Are you doing a calculation about chocolate? 🍫😋

July 6, 2021, 04:28		#3
Clau.77 Member Claudia Join Date: Mar 2021 Posts: 43 Rep Power: 6	Yes, i am working with chocolate for my master thesis The boundaries should stay the same. I also tried using different boundaries but that didn't help. I thought the value for h is pretty low too, but when I m using the whole geometry, I also get values like e-53, but it runs nevertheless... and I actually wouldn't know what to do to get a higher value.