Fluids

Fluids

Remove Constant Temperature Setting in Fluent

    • sahua1
      Subscriber

      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
      Ansys Employee

      I can't see the images. 

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

      • sahua1
        Subscriber

        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
      Ansys Employee

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

      • sahua1
        Subscriber

        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
      Ansys Employee

      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
        Subscriber

         

        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
          Ansys Employee

          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?

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