tow phase flow in 180 degree bend

akbar

hi,

i simulate a 2 phase free surface flow(water and air) in a 180 degree channel bend. i have 2 questions: 1-the velocity vectors in a plane(secondary velocity) has different pattern from that seems in the one phase (only water) flow modeling. 2-how can i extract the water depth in this problem.(i want to plot the water depth variations in the different sections to compare them with experimental results). -------------- with thanks. akbar safarzadeh.