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-   -   2D annulus for Gambit (https://www.cfd-online.com/Forums/fluent/29082-2d-annulus-gambit.html)

 newbie November 16, 2001 10:33

2D annulus for Gambit

Anyone know how to create a 2D annulus for air-water flow? The gas-liquid interface could be in the upper or lower part of the annulus depending on flow regime. I've tried, but Fluent treats it as two separate, parallel pipes. Axisymmetric wont work either due to the asymmetric flow patterns, Please help!

 chiseung November 16, 2001 22:23

Re: 2D annulus for Gambit

If you solved that problem in axial direction, your problem is natural. It means you have to solve two separate flow problems(air flow and water flow). Try to solve that problem separately in a same geometry and couple the two flow field solutions. That would be one of the proper ways to solve it.

 An Modh Coinniolach November 19, 2001 04:39

Re: 2D annulus for Gambit

You have two volumes, one interfering with the other. Subtract the inner pipe form the outer one and you will have your annulus.

 Newbie November 19, 2001 05:31

Re: 2D annulus for Gambit

I've created 3D annuli easily using subtraction, however, I have faces, not volumes, in a 2D model, so what do I do in this case?

 An Modh Coinniolach November 20, 2001 07:08

Re: 2D annulus for Gambit

You can subtract a face from another face in a similar way.

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