Learning Forum

[Ashraf El Naggar]

I am working on Battery Pack Thermal Analysis for an Electric Vehicle. Whenever I get to the point of pressing "Run Calculation", the solver displays 1 iteration only then displays some info and "Floating Point Exception". Here are the messages displayed in the console:

 

 

iter energy uds-0 uds-1 time/iter

1 1.6096e-07 7.8111e-07 7.7842e-07 0:00:40 10

Stabilizing temperature to enhance linear solver robustness.

Stabilizing temperature using GMRES to enhance linear solver robustness.

Divergence detected in AMG solver: temperature 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.

Stabilizing uds-1 using GMRES to enhance linear solver robustness.

Divergence detected in AMG solver: uds-1

Divergence detected in AMG solver: temperature

Divergence detected in AMG solver: uds-0

Divergence detected in AMG solver: uds-1

Divergence detected in AMG solver: temperature

Divergence detected in AMG solver: uds-0

Divergence detected in AMG solver: uds-1

Divergence detected in AMG solver: temperature

Divergence detected in AMG solver: uds-0

Divergence detected in AMG solver: uds-1

Divergence detected in AMG solver: temperature

Divergence detected in AMG solver: uds-0

Divergence detected in AMG solver: uds-1

Divergence detected in AMG solver: temperature

Divergence detected in AMG solver: uds-0

Divergence detected in AMG solver: uds-1

Error at host: floating point exception

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

Compute processes interrupted. Processing can be resumed.

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

Error at Node 3: floating point exception

Error at Node 2: floating point exception

Error at Node 5: floating point exception

Error at Node 4: floating point exception

Error at Node 1: floating point exception

Error at Node 0: floating point exception

Error: floating point exception

Error Object: #f


I am new to Ansys Fluent, so I will be glad if anyone helps me throughout this problem. Thanks in advance!

 

[Nilay Pedram]

Hello,
Please check/verify the solver settings, boundary conditions applied to your problem and make sure they are set correctly.
Thanks! 

[Ashraf El Naggar]

 

Thanks for your response, I will mention what I’ve done until I got this error. If you have any feedback that can guide me throuout the analysis please provide me with it.

1- I defined conditions for air flow inside the enclosure and obtained the velocity profile as shown below without any problem.


2- I enabled energy equation, MSMD battery model, and turned the time into transient.
3- I defined required parameters and printed the number of series cells, which appeared to be 15 as it should be.
4- I defined the required materials and assigned them to suitable cells, tabs, busbars.
5- I initialized the model and pressed run calculations.
6- Floating point exception error.

 

[Ashraf El Naggar]