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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › LWF model not working on a coupled wall interface › Reply To: LWF model not working on a coupled wall interface

October 21, 2024 at 8:44 pm
milad.mahjoo
Subscriber

 

Dear Mr. Rob.

Thank you so much for your prompt attention and response to my question. I really appreciate the time and effort you put into helping out.

To provide more context about my issue regarding your answer:

 

  • Yes you’re right. This situation is not mentioned as a limitation in ANSYS Fluent User guide for Lagrangian wall film. (although the other model for simulating wall film which is eulerian wall film is mentioned as a model that is not working correct on non-conformal interfaces)
  • Since I was curious about the energy terms too, I tried to run the simulation without even solving the energy equation (deseleting it from equations menu) but the problem still remains.
  • Here’s a visual representation of the problem, as seen in the attached image. In left side where there is only a fluid cell zone and the target face is a normal wall boundary, the wall film is forming correctly over time. On contrary, on the right side where there are two cell zones (connected with an interface between non conformal meshes) and the target face is the interface, wall film is taking odd shape and heigh values (as its depicted with near 1 mm value which is incorrect)

 

  • I changed cell characteristic lenght value for both solid and fluid meshes in various cases to check your point about face and parcel sizes but problem still remains.

If there’s anything specific I might have missed or further details you’d need, please let me know. I’m eager to resolve this and truly appreciate your guidance.

Thanks again for your support.

Best regards,

 

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