Questions on Boundary Profile,Help!!!

Cindy Jones

Hi,

I am not sure how Fluent profile works.

The simple case I am trying right now is to combine two pipes together using boundry profile files. First, I created one profile file from the outlet surface of the first pipe. And then when I started running the second pipe, I used the profile as the boundary condition for the inlet surface. These two pipes have the same diameters,same orientation but different meshes. The second pipe inlet type is velocity-inlet. My questions are:

1. The mass flow rate for these two pipes are noticeably different. Why does this happen? and How can I work around it?

2. Even I used components to transfer the information from profile to the second pipe's inlet, every cell on the inlet surface has the same u,v,w velocity. If this is always the case, what is the point to use profile file? or did I miss something when I tried to use profile?

I have been struggling with this for a while, thanks for your help!

Cindy