[sasanghomi]

Dear friends,

One of the projects that I am dealing with is about the calculation of loss coefficients (DP/(0.5*rho*V^2)) in a 4-way junction. (three inlets and one outlet)
Also, I have tried to compare my results with those mentioned in the following book;
"Internal Flow Systems" , "Ds Miller"
Unfortunately, there is a discrepancy in the results. (40% almost). In detail, in my simulation the magnitude of Yplus is under 100 and the drop pressure is calculated in the regions that the flow is developed totally. Moreover, the drop pressure that comes from friction is calculated according to Moody diagram and it is subtracted from the drop pressure in the junction.
By the way, SST turbulence model is used and Reynolds number is around 1e5.
Does anybody have any idea about this problem or know other references for the validation?

Any hint is appreciated,
Best Regards
Sasan Ghomi