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Set heat flux BC at wall for changing temperature

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Old   October 4, 2018, 08:19
Default Set heat flux BC at wall for changing temperature
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I'm trying to simulate the heat transfer between air-flow at constant temperature and a battery cell which changes its temperature over time. I know the heat generation rate and initial temperature of the battery cell. I also know the flow velocity and the temperature of the air stream surrounding it, but I'm not quite sure how I should define the boundary condition.


The heat flux depends on both temperatures, but the temperature of the battery cell is not constant (it heats up as we start drawing current), so the temperature and heat flux changes over time. Is there a way to define a time dependent battery cell temperature?


Or am I missing something?
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Old   October 4, 2018, 11:53
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I can't really follow what you are trying to do so let's go through the steps like we are learning it for the first time. Let's go over the knowns and constraints.



What is the domain? Battery only, flow only, or battery and flow?

What are the physics?
What are the known BC's so far? Then we can identify the needed BC's.
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Old   October 10, 2018, 09:33
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Quote:
Originally Posted by LuckyTran View Post
I can't really follow what you are trying to do so let's go through the steps like we are learning it for the first time. Let's go over the knowns and constraints.



What is the domain? Battery only, flow only, or battery and flow?

What are the physics?
What are the known BC's so far? Then we can identify the needed BC's.

Sorry for the extremely late response. But for now we solved it by assuming constant temperature. If we need changing temperature in the future we'll cross that bridge then. For now we're taking it one step at a time.
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