|April 4, 2012, 20:57||
UDF for velocity profile
Join Date: Jan 2011
Posts: 37Rep Power: 4
I'm trying to write a UDF for an inlet velocity boundary condition. I want my velocity profile varies vertically and transversally. I know how to write a function for each case but not for both at the same time.
x = longitudinal coordinate,
y = vertical coordinate,
z = transversal coordinate.
U(z) = 1.0 + sen((2*pi/750)*z); horizontal velocity as a function of z-coordinate.
U(y) = U(z)*(y/12.8)^0.142857
The center of my channel inlet is at (x,y,z)=(0,0,0), and the contours extent to z = +-175 and y = +-15.
For the vertical velocity profile I wrote the following function:
DEFINE_PROFILE(Velocity, t, i)
real x[ND_ND]; /* this will hold the position vector */
begin_f_loop(f, t) /* loops over all faces in the thread passed
in the DEFINE macro argument */
y = x;
y = y+15;
F_PROFILE(f, t, i) = 2*pow((y/(12.8)),0.142857);
But how can I iclude in the function the tranversal variation of velocity???
Any help will be appreciated!!
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