[impreza]

hi all
sorry for disturb, i still new in this software, and i need some help

currently i make a simulation for my final year project
and i got the problem when i want to validate my data with experiment data.
my analysis is about a bending pipe, where i set velocity 10m/s at inlet and i need to measure the velocity profile at outlet
my problem is, the experiment data is different with simulation data. the velocity outlet for experiment is in average 3m/s, where i got in simulation in average 8m/s. its around 170% error

so, anyone know how can i get the right data in my simulation.
i tried change for different type of k-epsilon model, tried with different mesh number, but nothing change.

hope someone can help me. thanks.

p/s: sorry for my bad English since it' not my native language