Poiseuille boundary condition

cosine · May 18, 2010, 04:38

Hello,

I want to model flow in a 3D tube, but i want to define a parabolic (Poiseuille) velocity profile at the inlet. Can somebody help me?

The profile i want to apply is shown in figure (one of them).

cosine · May 18, 2010, 04:44

Sorry, this is the image

ghorrocks · May 18, 2010, 07:47

I have no idea what the blob in your image means.

Simply write a CEL function which describes your boundary velocity as a function of x, y and z and use it as the velocity component in a velocity inlet boundary. You do this either using analytic functions or 1D or 3D interpolation functions.

May 18, 2010, 04:38	Poiseuille boundary condition	#1
cosine Member Join Date: Apr 2009 Posts: 34 Rep Power: 16	Hello, I want to model flow in a 3D tube, but i want to define a parabolic (Poiseuille) velocity profile at the inlet. Can somebody help me? The profile i want to apply is shown in figure (one of them).

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May 18, 2010, 07:47		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,694 Rep Power: 143	I have no idea what the blob in your image means. Simply write a CEL function which describes your boundary velocity as a function of x, y and z and use it as the velocity component in a velocity inlet boundary. You do this either using analytic functions or 1D or 3D interpolation functions.