Cylinder flow Mesh

Cagatayemre · February 26, 2018, 10:29

Hello dear foamers,
I am studying a mesh in order to solve flow around a cylinder at Reynolds 100. When I compare my vortex shedding frequency with the value in the literature I get 5 percent error. Error due to drag coefficient is 8 percent. I need to decrease these error. I think its because of mesh. How can I avoid these types of shape of mesh? I have 90,000 cells. My setup folders are attached. Any help will be appreciated.

I used snappyHex, extrudeMesh, topoSet and refineMeshDict in order to generate a 2D mesh with less computational cost.

Thank you very much

HakikiCanakkaleli · March 4, 2018, 15:06

Quote:

How can I avoid these types of shape of mesh?

Could you please tell us what exactly you mean by these?

Offtec · March 7, 2018, 14:22

I recommend you to try open source mesh generation program GMSH. Its quite straightforward to use and you can easily define your cell spacing and refinemet factors.

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March 7, 2018, 14:22		#3
Offtec New Member Mark Join Date: Aug 2017 Posts: 5 Rep Power: 8	I recommend you to try open source mesh generation program GMSH. Its quite straightforward to use and you can easily define your cell spacing and refinemet factors.