Pipe flow patterns

July 12, 2001, 04:37

Hello everyone. Has anyone out there succeeded with Fluent 5, the simulation the flow pattern types of two-phase (liquid & gas) pipe flow, i.e. stratified, wavy, slug, annular and bubble. I am currently attempting to do so with Fluent 5's ASM & VOF models and find nothing but perpetual non-convergence, most notably with the continuity residual. If anyone has any experience of this type of modelling, I would be grateful to hear from them. Thanks in advance.

July 12, 2001, 05:37

Hi!

The ASM model is not right for modelling most of your systems. It is not really a multi-phase model at all! It is just really post-processing.

You will need to use an Eulerian model to see most of the effects you want. You can use the VOF model for slugging, but as you say I cannot get it to work, either!

July 13, 2001, 08:01

So what IS the the ASM model good for?

July 13, 2001, 08:35

Hi!

I think it is for multi-phase flow where the fraction of dispersed phase is very low and will not effect the main phase.

I'm not sure it should be called multi-phase, really.

July 12, 2001, 04:37	Pipe flow patterns	#1
Atholl Guest Posts: n/a	Hello everyone. Has anyone out there succeeded with Fluent 5, the simulation the flow pattern types of two-phase (liquid & gas) pipe flow, i.e. stratified, wavy, slug, annular and bubble. I am currently attempting to do so with Fluent 5's ASM & VOF models and find nothing but perpetual non-convergence, most notably with the continuity residual. If anyone has any experience of this type of modelling, I would be grateful to hear from them. Thanks in advance.

July 12, 2001, 05:37	Re: Pipe flow patterns	#2
Isa Guest Posts: n/a	Hi! The ASM model is not right for modelling most of your systems. It is not really a multi-phase model at all! It is just really post-processing. You will need to use an Eulerian model to see most of the effects you want. You can use the VOF model for slugging, but as you say I cannot get it to work, either!

July 13, 2001, 08:01	Re: Pipe flow patterns	#3
Atholl Guest Posts: n/a	So what IS the the ASM model good for?

July 13, 2001, 08:35	Re: Pipe flow patterns	#4
Isa Guest Posts: n/a	Hi! I think it is for multi-phase flow where the fraction of dispersed phase is very low and will not effect the main phase. I'm not sure it should be called multi-phase, really.

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