"O" Grid?????

Bdew8556 · May 10, 2016, 05:17

Hi guys,

Came across some literature recently that referenced an "O" grid.

It was used to capture the flow near impeller vanes.

Any thoughts on what exactly that is?

Brett

agd · May 11, 2016, 15:26

An O-grid is a structured grid that wraps around the body, such that the last plane normal to the wrap around direction is coincident with the first plane normal to the wrap around direction. See also

http://www.innovative-cfd.com/cfd-grid.html

Bdew8556 · May 12, 2016, 06:54

Thanks heaps, The picture in the link explained it well.

Ive heard that a C-H grid is best for use on airfoils.

Any thoughts on why this is?

agd · May 12, 2016, 14:07

A C grid or H grid will allow for the wake to be better resolved.

http://turbmodels.larc.nasa.gov/naca0012_grids.html

May 10, 2016, 05:17	"O" Grid?????	#1
Bdew8556 Senior Member Brett Join Date: May 2013 Posts: 216 Rep Power: 14	Hi guys, Came across some literature recently that referenced an "O" grid. It was used to capture the flow near impeller vanes. Any thoughts on what exactly that is? Brett

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May 11, 2016, 15:26		#2
agd Senior Member Join Date: Jul 2009 Posts: 358 Rep Power: 19	An O-grid is a structured grid that wraps around the body, such that the last plane normal to the wrap around direction is coincident with the first plane normal to the wrap around direction. See also http://www.innovative-cfd.com/cfd-grid.html

May 12, 2016, 06:54		#3
Bdew8556 Senior Member Brett Join Date: May 2013 Posts: 216 Rep Power: 14	Thanks heaps, The picture in the link explained it well. Ive heard that a C-H grid is best for use on airfoils. Any thoughts on why this is?

May 12, 2016, 14:07		#4
agd Senior Member Join Date: Jul 2009 Posts: 358 Rep Power: 19	A C grid or H grid will allow for the wake to be better resolved. http://turbmodels.larc.nasa.gov/naca0012_grids.html