[matt.mech.eng]

Hi all,

I am running a simulation on an aeration tank and have been running into a few problems..

To try and troubleshoot an issue I have been having I have run a solution without having any gas enter the domain from the inlet. If you see the attached image which shows a plot of alpha and a vector plot of the continuous phase overlayed.

I keep getting similar results no matter what I try changing, it appears the continuous phase, b starts to move up the wall!!! This happens for both turbulent and laminar cases, if alpha is initialized (ie no interface between the 2 fluids alpha is initially zero all over the domain), and regardless of whether or not there is a gas inflow at the inlet boundary.

I am stumped and can not figure out what is going wrong- maybe someone here can?

Kind Regrads

Matt