Learning Forum

[rl517]

I am currently trying to get a small cylindrical cell battery pack working using the MSMD battery model, for which I have followed the procedures from the fluent manual and a youtube tutorial in terms of the named components (tabs, bus bars etc.). Here is the mesh (roughly 400k elements):

 

The average skewness is 0.22, and the average orthogonality is 0.77, which I understand are acceptable values.

In fluent after setting up the MSMD model and successfully initialising, I get the following floating point exception error when running the calculation, which after doing some research this seems like it could be the result of almost anything.

Error at Node 0: floating point exception

Stabilizing uds-0 to enhance linear solver robustness.

Stabilizing uds-0 using GMRES to enhance linear solver robustness.

 

Divergence detected in AMG solver: uds-0 Stabilizing uds-1 to enhance linear solver robustness.

 

Error at host: floating point exception

 

===============Message from the Cortex Process================================

 

Compute processes interrupted. Processing can be resumed.

 

==============================================================================

 

Error: floating point exception

Error Object: #f

 

Grateful for any assistance as to how to fix this, please let me know if more info is required.

[Rahul Kumar]

Hello, 

Yes, looks like an initialization parameter was not defined right. Could also be an issue with the setup. Can you please follow the MSMD tutorial (Chapter 27: Simulating a Single Battery Cell Using the MSMD Battery Model (ansys.com)) and set it up based on this tutorial? 

[ali.abbas]

check if double precision is enabled

[rl517]

This appears to have fixed it, the calculation runs now. Thank you so much!

[rl517]

Although now this model for some reason is giving me temperatures of 5000K, no idea why they are so high

[ali.abbas]

Give me your mail so i can contact you

[rl517]

cjlral@gmail.com

[am21s079]

Is the temperature problem resolved? Please share the solution. I'm also facing the same issue.

[Arman Burkitbayev]

Did you have a problem when you parametrized the battery with HPPC data?