pressure b.c
 

hello all, Iam solving flow over an obstacle in a channel.i use velocity b.cs only.ie., no slip at the upper and lower walls of the channel and on all the walls of the obstacle with convective out flow condition.

regarding pressure i donot fix pressure any where and also donot make the pressure derivative zero at the channel walls.i get good results with this. will the solution improove by putting some kind of pressure b.c. i am using MAC algorithm. thanks in advance. senthil