How to set wind tuunel Boundary Condtions?

Saima · April 13, 2009, 14:11

Hi ,

I have a problem in which a heater is on leading edge of an airfoil, placed in wind tunnel. Air is inside the tunnel at -5C. And water spray by using atomizer is also there.

This airfoil is placed inside the wind tunnel.I want to setup the boundary conditions. I took,

1. Velocity inlet (bcoz i know the initial velocity which is constant in entire process)
2. Outflow
3. The bottom and top wall (wall with zero shear)

I want to know what could be the boundary conditions for top and bottom walls of Wind tunnel?

It is very urgent.

Many Many thanks in advance.
Regards,
Saima

lakeat · April 13, 2009, 22:24

1. 2D or 3D ?
2. what's your Turbulence model ?
3. Slip wall or symmetry plane is first and second choice I think.

Saima · April 13, 2009, 22:38

It is 2D. I m using (VOF+Solidification) , k-eps (2-eq) model.

I didn't took symmetry bcoz heater is not symmetric.

I draw whole airfoil.
I have not use fluent b4 and it is my 6-credit project.

Please help me.

Saima

April 13, 2009, 14:11	How to set wind tuunel Boundary Condtions?	#1
Saima Senior Member Saima Join Date: Apr 2009 Location: Canada Posts: 185 Rep Power: 16	Hi , I have a problem in which a heater is on leading edge of an airfoil, placed in wind tunnel. Air is inside the tunnel at -5C. And water spray by using atomizer is also there. This airfoil is placed inside the wind tunnel.I want to setup the boundary conditions. I took, 1. Velocity inlet (bcoz i know the initial velocity which is constant in entire process) 2. Outflow 3. The bottom and top wall (wall with zero shear) I want to know what could be the boundary conditions for top and bottom walls of Wind tunnel? It is very urgent. Many Many thanks in advance. Regards, Saima

April 13, 2009, 22:24		#2
lakeat Senior Member Daniel WEI (老魏) Join Date: Mar 2009 Location: Beijing, China Posts: 689 Blog Entries: 9 Rep Power: 21	1. 2D or 3D ? 2. what's your Turbulence model ? 3. Slip wall or symmetry plane is first and second choice I think. __________________ ~ Daniel WEI ------------- Boeing Research & Technology - China Beijing, China Email

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April 13, 2009, 22:38		#3
Saima Senior Member Saima Join Date: Apr 2009 Location: Canada Posts: 185 Rep Power: 16	It is 2D. I m using (VOF+Solidification) , k-eps (2-eq) model. I didn't took symmetry bcoz heater is not symmetric. I draw whole airfoil. I have not use fluent b4 and it is my 6-credit project. Please help me. Saima