VOF: Volume fraction, fluid volume function, which is defined as the ratio of target fluid volume to grid volume for each grid of flow field. As long as we know the value of this function on each grid, we can track the moving interface.

#include "udf.h "

# contains "math.h"

Definition _ Profile (Entry _ x _ Speed, Thread, Index)

{

real x[ND _ ND]；

Real y, z;

face _ t f；

Start loop (f, thread)

{

F_CENTROID(x, f, thread);

//x = x[0]；

y = x[ 1]；

//z = x[2]；

if(y & lt； 0.0 18 1)

F_PROFILE(f, thread, index) = 2.0994 * log (y)+9.4438;

other

F_PROFILE(f, thread, index) =15;

}

End_f_loop(f, thread)

}