Reply To: Problems with dynamic mesh settings while mesh motion

[Midjan Jusic]

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!