hi All,

i want to apply periodic b.c in plane channel flow in the streamwise direction. can anybody help me in this regards.

do , i have to change the governing equation to apply the periodic b.c in the existing code , where inflow/outflow condition was imposed previously. my code is based on fdm.

> do , i have to change the governing equation to

no,

assume 1-D grid (i=0,N+1), you have two fictitious grids at boundaries (i=0, i=N+1) to exsert bc,

to impose periodic bc you should do sometihng like this:

u(0) = u(N) u(N+1) = u(1)

Hi,

But I think you also have to fix the height of the domain size equal to an integer multiple of the wavelength of the biggest (??) resolved wave.

But I haven't implemented it yet, but trying to.

regards,

TAW

hi,

could u please tell me that when i will use periodic b.c , in streamwise direction...the how i could handle the driving pressure term as source term...