Fluids

Fluids

Why I can’t get Temperature gradient at inside of solid? [Convection problem]

    • DongwooChoi
      Subscriber

      Hello, first I want to thanks to everyone in this Forum. I got many helpful informations...


      I'm doing convection cooling. I want to cooling 500K cylinder with 200K air. (Transient)

      I used "Initialization" to set air temperature 200K, "patch" to set cylinder temperature 500K.

      Air is contained by walls, I gave "Heat flux"=0 boundary conditions for thoese walls, so they are adiabatic.

      Air and cylinder contacting walls are coupled.

    • Rob
      Ansys Employee
      Check the heat flux through the coupled wall. After 20s how much heat do you expect to be transferred, if you then look at the solid heat capacity how much should that reduce the temperature?
    • DongwooChoi
      Subscriber

      Thank you for replying.
      That was the way to think I should follow! I'll try your advice.
      I don't know how to check them, but there must be some way.
      Thank you very much!
    • DongwooChoi
      Subscriber
      Thank you for replying.

      That's the way to think! I'll try your advice.
      Thank you
    • DongwooChoi
      Subscriber
      Thank you for replying
      I don't know why my comments are gone when I tried to edit them!

      Anyway, that's how should I think about this proble! I'll try your advice
      Can I get any advice about temperature gradient problem too?

      Thank you very much
    • Rob
      Ansys Employee
      The Spam filters don't like you - it'll be IP or the like so don't worry.
      Re the gradient - if the heat flux is low such that there isn't enough heat to give a temperature gradient you won't see one. You're also displaying over the full range, try focussing on 495-500K and separately 200-300K.
    • DongwooChoi
      Subscriber

      Thank you so much. There was no one around me to ask about Ansys. I really appriciate you.
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