moving airfoil problem
 

hi all, I am facing problem in remeshing of a simple sinusoidal oscillation case of naca0012 airfoil. I am using tri mesh
with only remeshing feature. my mesh is working but I am not able to get good remeshing around my airfoil, while doing simulation it's showing additional diffusion. I need guideline for how i can improve remeshing and also suggest whether we can use structured grid for my case or not .
thanks in advanced