Pressure gradient in complex geometries

Lattice Boltzmann Method LBM: Theory
#1

Dear all

I am working on a 2-D channel flow past a circular cylinder with a considerable pressure gradient. As far as I know, body force is used to simulate the pressure gradient in simple geometries. In this case, where the pressure gradient is unknown before simulations, how can I implement the pressure gradient?

Thanks.

#2

Hi,

If you don’t know the pressure gradient, you may find it useful to implement velocity boundary conditions instead of pressure boundary conditions.