Learning Forum

[sahua1]

Hello,

I am trying to model a simple single cell on a cooling plate with a cooling channel. However, despite a cell heat generation rate of 47,006.3 W/m^3, the system constantly goes to 20°C no matter the temperature at the inlet. Kindly see pictures below of the pathlines of coolant temperature and a contour of the cell temperature when inlet temperature is 30°C.

I would really appreciate any tips on how to fix this.

Thanks.

[Rob]

I can't see the images. 

What are the wall boundary conditions? Did you check the model scale? 

[sahua1]

Hello, sorry for the late response. I didn't realise the pictures didn't upload. Please find them attached now. For the boundary conditions;

Inlet velocity = 0.18 m/s, temperature = 30°C

Cell heat generation rate = 47006.03 W/m^3

I didn't change the thermal conditions of the other boundaries.

[DrAmine]

No pictures till now. What do you mean with single cell: do you have only one "finite" cell in your case?

[sahua1]

Hello, sorry for the late response. I didn't realise the pictures didn't upload. I only have a single "finite" cell on one cooling plate with an S-shaped coolant channel running through it.

[DrAmine]

I do not understand your case. Can you list the zones and the models you are using? If you go to flux report and do heat flux reporting: can you add the screenshot of the info printed into the Fluent console?

[sahua1]

 

Hello,

Kindly find the fluxes attached. This was with inlet temperature set to 20°C and a flow rate of 0.18 m/s and the cell heat generation rate set to 47006.03 W/m^3. Why isn't the cell generating heat? Shouldn't Ansys be able to show the temperature change in steady state? Or does it have to be in transient state?

 

 

[DrAmine]

Which Cell: Can you please list all cell zones you have? Can do the flux report for all BC and not only the inlet/outlet?