I have been trying to set User defined Boundary conditions for a test case consisting incompresible, pulsatile flow. can anybody tell me in detail how should I do this. The velocity profile is sinusoidal.

It should look like this

DEFINE_PROFILE(sinusoidal_profile,thread,nv)

{ cell_t c;

face_t f;

real x[ND_ND],u;

begin_f_loop(f,thread)

{

F_CENTROID(x,f,thread);

F_PROFILE(f,thread,nv)= sinusoidal function;

}

end_f_loop(f,thread)

}

After Interpretting the UDF , you will see it in the boundary condition panel drop down menu. Select the name of the function ( sinusoidal_profile ) from the drop down when you select the boundary condition for the velocity at the bounday.

Hi ajay,

Thanks for the help. It worked. And I am able to get along with it.

thanks again, -ravi.