[phsieh2005]

Dear Foamers,

I am wondering someone can give me some advice on an issue I am seeing with interFoam.

I have a flow channel with one inlet, one outlet, and walls. the flow field is initially filled with water. When calculation starts, I start inserting air into the inlet, something like this:
(0 1)
(0.001 0)
(0.002 0)
(0.003 1)
(0.1 1)
(0.101 0)
(0.102 0)
(0.103 1)
(1 1)

During the time steps when alpha.water transition from 1 to 0, delta t decreases almost by order of 10. Same occus when alpha.water transition from 0 to 1.

Is there a way to address this type of issue?

Pei-Ying