[mehran.mo]

hi all

I'm working on curvature inlet that upload its picture below .i want to define 3d velocity profile for inlet. my flow is turbulence and my udf is written below

#include "udf.h"
#define ymin 0.03031
#define ymax 0.03500
#define umean 12.5
#define B 1/7

DEFINE_PROFILE(x_velocity,t,i)
{
real x[ND_ND],y,h_y,del_y,ufree;
face_t f;
h_y=ymax-ymin;
del_y=h_y*0.5;
ufree=umean*(B+1);
begin_f_loop(f,t)
{
F_CENTROID(x,f,t);
y = x[1];
if((y-ymin)<=del_y)
F_PROFILE(f,t,i)= -1*(ufree*pow((y-ymin)/del_y,B));
else
F_PROFILE(f,t,i)= -1*(ufree*pow((h_y-(y-ymin))/del_y,B));
}
end_f_loop(f,t)
}
i chose a component type for velocity inlet and give this udf as a x velocity profile and set 0 for other component but fluent set a profile that upload its picture blow ( my profile vector must be in x direction but it is not)

I was wondering if someone could point me in the right direction on implementing this function for this particular case
Untitled.jpg

geom.jpg

profile.jpg

[blackmask]

You inlet boundary is parallel to z-axis, why do you assign x-velocity instead of z-velocity? Another problem is in the implementation. In C language if you do two integers division 1/7 you will get an integer 0, which might not what you have intended. Please use floating point division (1.0/7) instead.

[mehran.mo]

hi black mask thank you for replying it has been working