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Air Cooling system - Convergence Issue
Posted 21.06.2021, 19:01 GMT-4 Computational Fluid Dynamics (CFD), Heat Transfer, Battery Design 0 Replies
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Hello all,
I'm modeling a cooling system by fan. The air flow comes from the fan going through a tray that contains various battery cells at 60°C. I want to figure out what is the power and the temperature of the air flow in order to achieve 25°C for the cells as quick as possible.
The geometries of the tray and the cells are quite simple (rectangular block). I added one block outside for the air. The air flow comes from the top of this block, the remaining of the block surface is set to be open boundary. (cf. attached figure) Do we need to add an outflow?
For the turbulence model, I started with Algebraic yPlus, which is the most simplest as my understanding.
Nevertheless, the simulation cannot converge, even after following the instructions in this link (https://www.comsol.com/support/knowledgebase/1172). Since I've seen models that are more complex than mine, it is hard to believe that the model is too complex for convergence. I also used symmetric condition in order to reduce the complexity.
I tried to simulate with only the battery cell without the tray and it works. I don't understand why adding a tray cause an issue.
What else do you think can cause the convergence issue ? (meshing?, turbulence model?, ...)
Thank you all,
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Hello My Linh Le
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