Expansion ratio in solid-fluid interface
 

Hi, I have some doubts with my mesh (look to the picture)
Is it ok to have big expansion ratios between the solid and the fluid zones or should I refine my solid mesh?

https://drive.google.com/file/d/1IhU...ew?usp=sharing

https://drive.google.com/file/d/1IhU...ew?usp=sharing