Hi, i am doing a simulation of oil and water in a cylindrical pipe but i facing the trouble that i can't get a convergence result for my simulation. I have tried to iterate it many times after modified the parameters inside fluent but the results still dissapointed me.

Can anyone suggest to me what's going wrong?

Erm...some parameters i used: d=0.0254m, 9.5m; mixture velocity=2.76m/s (and i determine the oil and water velocity by using mass balance after i fixed the volume fraction for them both, for example: water=0.1, oil=0.9,am i right?); steady state; k-epsilon.

so, is that any 1 can help or guide me to get a convergence result?

Thank you

Answer the four questions:

how is your meshing? typical radial and axial grid size...

do you use a first or high order scheme ?

what is your y+ (turbulence) value at the walls ?

are you using the steady solver to reach steady state ?

Then It would be possible to answer you...

Another point: what multiphase model is involved?

Edi.

Read Tutorial 18 (Using the Mixture and Eulerian Multiphase Models)