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

Federico
Ansys Employee

The cell height you specify is the ideal cell height for the adjacent cell layer. 

Fluent will collapse cells with height < 0.2*[ideal cell height], and split cells with height > 1.4*[ideal cell height]

0.2 and 0.4 are correspondingly the collapse and split factors by default. You can change these settings in the Layering settings.