increase temperature

- July 30, 2023 at 6:55 am
  
  peppers
  Subscriber
  
  I did a conjugate heat transfer analysis, where plate A conducts plate B and then plates A and B convex air. but the results of the fluid outlet temperature do not match reality. the results in this simulation are plate A of +- 700 K, plate B +- 320 K, and 300.1 K fluid which only increases 0.1 K from 300 K. is there a solution where it's wrong? I tried changing the material but it didn't have a big impact, I tried increasing the heat transfer coefficient instead the results were smaller for plates A and B. but the fluid didn't change too much it was still around 300K.
  
  I have done a mesh interface where the plates are the source and the faces in the fluid are the targets. but what to fix? please give me a suggestion
  
  Thank You
- July 31, 2023 at 7:19 am
  SRP
  Ansys Employee
  Hi,
  There could be several reasons why your results are not matching reality. Here are some common issues and suggestions to improve your simulation:
  1. The mesh near the boundaries and interfaces should be fine enough to resolve the boundary layers. If the mesh is too coarse, it may lead to inaccurate results.
  2. Ensure that the fluid inlet and outlet conditions are well-specified, and any external heat transfer conditions are accounted for accurately.
  3. Verify that you are using the correct material properties for all the components involved (plate A, plate B, and fluid).
  4. Ensure that the solver settings are appropriate and converged.
  5. The heat transfer coefficient you mentioned can have a significant impact on the heat transfer rate between the solid and fluid. Ensure you have the correct coefficient and convection boundary conditions set up.Thank you.
  - July 31, 2023 at 3:41 pm
    
    peppers
    Subscriber
    
    how to do interface contact between source and target in proper mesh for solid to fluid?
    because I feel confused when I move it to fluent, the interface is sometimes unreadable, sometimes there are errors so that Fluent exits, sometimes 'floating point exceptions'. i feel there might be something wrong at the interface between solid and fluid
    - July 31, 2023 at 6:52 pm
      
      peppers
      Subscriber
      
      i checked the total heat flux in the fluid domain (as i show by arrow) for zero. should if it has been converted the result is not equal to zero?