BCs for flat plate at angle of attack

Obad · May 11, 2015, 03:31

Hi guys,

I wrote a code for calculating the incompressible boundary layer over a flat plate with pressure gradient. Now I want to simulate flow at an angle of attack by simply stating the velocity components parallel (u) and normal (v) to the wall at the entry of my grid and the upper edge of the rectangular grid.

I tried to specify a fixed value for v at the upper boundary by changing the matrix that I'm using for my continuity equation, but it didn't work.

Can you please give me a hint on how the boundary conditions at these positions should look like.

Is it even possible to calculate such a flow (at angle of attack + specified pressure gradient) with the boundary layer equations?

Cheers!

tanmayagrawal7 · May 20, 2015, 04:29

Well, why don't you try the other way! Let the flow be parallel to x-axis and let your flat plate be tilted. This is usually the better way. In this case, pressure gradient BC should hold just like the previous case as far as I can see.

May 11, 2015, 03:31	BCs for flat plate at angle of attack	#1
Obad Member Obad Join Date: Sep 2013 Posts: 42 Rep Power: 12	Hi guys, I wrote a code for calculating the incompressible boundary layer over a flat plate with pressure gradient. Now I want to simulate flow at an angle of attack by simply stating the velocity components parallel (u) and normal (v) to the wall at the entry of my grid and the upper edge of the rectangular grid. I tried to specify a fixed value for v at the upper boundary by changing the matrix that I'm using for my continuity equation, but it didn't work. Can you please give me a hint on how the boundary conditions at these positions should look like. Is it even possible to calculate such a flow (at angle of attack + specified pressure gradient) with the boundary layer equations? Cheers!

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[OpenFOAM] Plot Angle of Attack Next to Transient Pitching Airfoil	dancfd	ParaView	6	October 24, 2013 00:37
[Netgen] Import netgen mesh to OpenFOAM	hsieh	OpenFOAM Meshing & Mesh Conversion	32	September 13, 2011 05:50
introducing angle of attack on ICEMCFD HEXA	icem beginner	Main CFD Forum	3	December 17, 2008 05:05
angle of attack with icem hexa	icem beginner	Main CFD Forum	0	December 5, 2008 16:54
angle of attack	kiran	FLUENT	0	September 10, 2004 08:18

May 20, 2015, 04:29		#2
tanmayagrawal7 New Member Tanmay Agrawal Join Date: May 2015 Location: Taiwan Posts: 29 Rep Power: 10	Well, why don't you try the other way! Let the flow be parallel to x-axis and let your flat plate be tilted. This is usually the better way. In this case, pressure gradient BC should hold just like the previous case as far as I can see.