Hi,

I have values for mass flow rate for flow in a pipe, from which I calculate the inlet velocity.

I'm using symmetry, to reduce computation time, therefore i have half the domain of the pipe.

My question is - do I apply the full, calculated, inlet velocity as the boundary condition or do I halve the inlet velocity, because of the half pipe, and then double the values of the results?

Thanks in advance,

Eric.

Hi,

no reason to half the inlet velocity, as you are using a symmetry and indicated it in your BCs.

cheers

David

I agree with David.

You have to specify the real velocity inlet.

[hhh]

Dear friends,
i am doing 3D wing analysis, i have doubt on boundary conditions in fluent ie both symmetry and periodic, anybody have the answer please let me know briefly,for what kind of purpose to use symmetry & periodic boundary conditions, please tell any example with problem.