[trusharg]

Hi

I am, new user of OpenFOAM.
I want to apply user defined boundary conditions.

I want to solve free jet problem and for that at the inlet I want to apply some following function at every time steps.

u(r,t)=u_profile(r)+u_noise(r,t)+u_forced(r,t)

u_profile(r)=(U_inlet/2)(1+tanh(R-r/2theta))
u_noise(r,t) is generate random noise
u_forced(r,t)=A*u_profile(r)sin(2piSt_d*U_inlet*t)

If any one have idea about implementation of user define BC, please guide me for this.

With Regards
Trushar