refine mesh near a rotating cylinder
 

Hello everyone, I am working on modeling flow passing a rotating cylinder, could any one give me advise or recommendation on how to refine mesh around the cylinder and the wake region.

How can achieve multi-block structured grid.
Cheers

Most recent studies on flow past a cylinder in the literature use O-type structured grids. Resolve the mesh in the region near the cylinder with edge sizings. If you require a detailed or highly resolved velocity field far downstream in the wake then you could use a larger rectangular region outside of the O-type grid as well. I've found (in agreement with literature) that using a cylindrical domain (circular in 2-D) yields accurate results for surface coefficients (lift, drag and pressure), the Strouhal number and the minimum streamwise velocity in the wake.

The key steps for creating a structured O-type grid:
1) create the cylinder in DesignModeler (or similar) and slice the cylinder into two halves so that you have an edge to apply an edge sizing
2) form one part from the multiple bodies so that Meshing and Fluent connects the adjacent faces of the domains
3) sweep one side of the cylinder through the domain to the other side
4) apply mapped face meshing on one side of your cylinder
5) apply circumferential and radial edge sizing (with a bias)

Thank you so much 'e' for your replay :):). Iwould like to ask you if the same steps I need to follow in the case of 3-D

Cheers