Boundary Layer Question

scottneh · September 28, 2010, 20:38

Hello,

I am using Star CCM+ 5.04 and I am trying to simulate a boundary layer over a flat plate with a wedge in the middle. I would like to have an accurate simulation of the boundary layer and how to build the boundary layer. I see that I have to input the height of the boundary layer and the number of layers but I really don't know what the real boundary layer would look like if I built the model and put it in a wind tunnel.

Can anyone offer any insight into how one goes about selecting these parameters?

Thanks
Scott

nomad · September 30, 2010, 14:50

I would setup an initial arbitrary mesh, sun the simulation, look at what's happening to the flow, then remesh accordingly depending on what flow structure develops where.

scottneh · September 30, 2010, 14:56

An arbitrary mesh for where I think the boundary layer is? I have a mesh for the overall flow volume. Would I turn on the prism layer and define arbitrary thickness and number of layers?

Thanks
Scott

nomad · September 30, 2010, 15:21

Yes, start with a few prism layers covering the edges and intersections of the wedge and the plate, then add or refine the prism layers as necessary.

September 28, 2010, 20:38	Boundary Layer Question	#1
scottneh Member Scott Join Date: Sep 2009 Posts: 30 Rep Power: 17	Hello, I am using Star CCM+ 5.04 and I am trying to simulate a boundary layer over a flat plate with a wedge in the middle. I would like to have an accurate simulation of the boundary layer and how to build the boundary layer. I see that I have to input the height of the boundary layer and the number of layers but I really don't know what the real boundary layer would look like if I built the model and put it in a wind tunnel. Can anyone offer any insight into how one goes about selecting these parameters? Thanks Scott

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Turbulent Boundary Layer on a Flat Plate	Hoshang Garda	FLUENT	1	November 27, 2013 11:24
RPM in Wind Turbine	Pankaj	CFX	9	November 23, 2009 05:05
Correct way to generate grids for boundary layer	quarkz	Main CFD Forum	5	November 24, 2006 00:25
question on bounday layer modeling	Wen Long	Main CFD Forum	2	November 12, 2005 18:29
Please help with flow around car modelling!	Tudor Miron	CFX	17	March 19, 2004 20:23

September 30, 2010, 14:50		#2
nomad Member John Join Date: Aug 2009 Posts: 92 Rep Power: 17	I would setup an initial arbitrary mesh, sun the simulation, look at what's happening to the flow, then remesh accordingly depending on what flow structure develops where.

September 30, 2010, 14:56		#3
scottneh Member Scott Join Date: Sep 2009 Posts: 30 Rep Power: 17	An arbitrary mesh for where I think the boundary layer is? I have a mesh for the overall flow volume. Would I turn on the prism layer and define arbitrary thickness and number of layers? Thanks Scott

September 30, 2010, 15:21		#4
nomad Member John Join Date: Aug 2009 Posts: 92 Rep Power: 17	Yes, start with a few prism layers covering the edges and intersections of the wedge and the plate, then add or refine the prism layers as necessary.