We have an exciting announcement about badges coming in May 2025. Until then, we will temporarily stop issuing new badges for course completions and certifications. However, all completions will be recorded and fulfilled after May 2025.

Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Problems with dynamic mesh settings while mesh motion › Reply To: Problems with dynamic mesh settings while mesh motion

April 10, 2024 at 7:23 am
Midjan Jusic
Subscriber

Hello, thank you for the answer. I tried it again. I still have problems with splitting cells above the cylinder. Collapsing below the cylinder works perfect. 

If I build the model like here:

 

everything works. But I need the area above the cylinder to define a pressure-inlet, because I want to move the cylinder by giving pressure in the pressure-inlet.

 

Question 1:

Do you have any idea, why the collapsing process works but the splitting not? The cells are still stretching above the cylinder. I tried various cell heights and splitting parameters.

 

Question 2:

If I definied a body force with -9.81 m/s in Y direction because I have water in my model. How can I make sure, that the cylinder does not fall downwards with -9.81 m/s? I want to move the cylinder with pressure at pressure-inlet. 

 

Thanks a lot!