Hi Federico,

Thank you very much for your explanation and reply,

Make sense, at the moment i am using CFL= 1 for my simulation specially in my area of interest (blade).

But my confusion is, what does it mean by mesh size ?(also, similarly going as minimum mesh size, cell length and characteristic cell length).

Which mesh size out of from  ΔxΔy, and Δz (according to my post)should i use for mesh size to calculate Δt ?