Symmetry and boundary conditions

eric

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.