Learning Forum

[KUMAR Kundan]

Hi everyone,

I am trying to simulate a battery cooling plate for EV, in which I am intretsed in heat transfer coefficient . I tried using two different approches, one by applying the constant temperature on the wall, and another by applying heat flux on the wall. In both cases, the value i am getting for the heat transfer coefficient does not matches the one which was calculated using the formula. And not only this, the difference I received was about 4-5 times bigger, specifically the heat transfer coefficient using fluent was 800 W/(m2 K) (almost the same for both cases), whereas the hand calculated one is around 3800 W/(m2 K).

If anyone can guide me here, how to check correct heat transfer coefficient? Or if there is anything to do with the boundary conditions?

PS - The simulation I am doing is in steady state condition, using SST-K_omega with energy on model.

[Nikhil Narale]

Hello,

 

How are you calculating HTC in Fluent? There are different types of HTCs in the reports. Please be aware that if you are calculating HTC using the surface HTC report, you need to set the correct reference temperature. 

 

Thanks!

Nikhil

[Nikhil Narale]

Additionally, for more information, check this section of the Fluent User's guide: 39.4. Alphabetical Listing of Field Variables and Their Definitions (ansys.com)

Once you open the link, search for 'heat transfer coef' 

If you are not able to access the link, refer to this forum discussion: How to access the ANSYS Online Help

 

Thanks!

Nikhil