[zainab]

Hello every one, I am a new member. I working on Fluent for modeling a two-phase, gas-liquid (air-water) slug flow in a pipe and I need some help please. My case: pipe length (583cm), (1.27cm) diameter, drawing and meshing by Gambit, the total elements was (112896 cell(, the pipe inlet set to (velocity-inlet), outlet to (outflow), pipe surface to (wall), the pipe continuum to (fluid). In fluent the define sequence as: 1. Solver: pressure based, unsteady, implicit scheme. 2. Multiphase: VOF. 3. Viscous: k-epsilon, standard. 4. Phases: primary as water, secondary as air, interaction: wall adhesion, surface tension (0.07). 5. Operating condition: gravity at y (-9.81), specified operating density. 6. Boundary condition: a. mixture velocity (1.6), k(0.025), epsilon(0.0072). b. air – multiphase volume fraction (1). 7. Initialize: vf=0.18, patch: air vf =0.18. I have a problem I need to get the contour of the slug vf, volume fraction? And, do I need to use a UDF for the velocity?[/FONT]