face loop
 

hello every body.. I have a few questions and I wish some one could help me here
First:: begin, end_f_loop and begin, end_c_loop :: could be used in 2D or only in 3D simulation?? and what's the difference between them??
second:: while using (begin, end_f_loop and begin, end_c_loop) and using F_P(f t) or C_P(c t) the return should be pressure but is it the total pressure or what??
could I use (begin, end_f_loop and begin, end_c_loop) in serial or only in parallel processor ??
thanks in advance.

You can use in 2d or 3d, serial or parallel. f stands for face, c stands for cell. The difference is the definition of cell and face in 2d and 3d. In 3d the cell is the 3d element, the face is a 2d element. In 2d the cell is bidimensional, the face is the side of the cell.
C_P (c, t) is the static pressure in cell c.

dear Daniele.. thanks for replay... is there any way to evaluate total pressure by UDF??

Yes,
read this and understand what is total pressure:
http://www.cfd-online.com/Forums/flu...-pressure.html

Once you know the definition, you can write your custom code.

thanks for reply my friend :)