How to generate CONTINUOUS slug flow in horizontal pipe

honliantat · January 14, 2017, 01:52

Hi all, i am trying to generate continuous slug flow in a 6m horizontal pipe using fluent, the BC (based on Bakers flow regime map, slug) i am using is:

Inlet air mass flux: 4 kg/m2s
Inlet water mass flux: 400 kg/m2s
wall: wall
Outlet: Pressure outlet, 0 gauge pressure

The problem is that i only can generate slug flow for only once, and then it turns into stratified flow.

Attached picture shows the BC and geometry.
How to generate slug flow that is continuous?

LuckyTran · January 16, 2017, 14:11

You are doing a transient simulation right? And are there perturbations at the inlet?

There does not appear to be any surface tension, I can't tell if there is any contact angle, or maybe it's not apparent. Can you please check?

January 16, 2017, 14:11		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,676 Rep Power: 66	You are doing a transient simulation right? And are there perturbations at the inlet? There does not appear to be any surface tension, I can't tell if there is any contact angle, or maybe it's not apparent. Can you please check? Last edited by LuckyTran; January 17, 2017 at 12:09.

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