Level-set VOF results problems

Dinocrack · November 18, 2011, 07:10

Hello!

I am trying to model flow front of a liquid-gas flow. In the case, with a polymer and an air.

To do that i am using VOF model in fluent, who give a pretty good flow front definition, according to the experimental.

I al trying to use level-set, but this seems more instable than VOF.

I am curious, since the couple Level-Set and VOF should give better results, right?

xrs333 · November 20, 2011, 07:17

NO, not always.

Dinocrack · November 20, 2011, 08:33

Quote:

Originally Posted by xrs333

NO, not always.

Why you said that?

xrs333 · November 20, 2011, 08:54

Fluent incorperated level-set into VOF from V13 on, and i believe the programmer had tested the code with a lot of cases, but the real flow is so complex that it is not reasonable you expect to get 'better' results just because of new method is used.

November 18, 2011, 07:10	Level-set VOF results problems	#1
Dinocrack Member Nuno Gomes Join Date: May 2009 Location: Portugal Posts: 39 Rep Power: 17	Hello! I am trying to model flow front of a liquid-gas flow. In the case, with a polymer and an air. To do that i am using VOF model in fluent, who give a pretty good flow front definition, according to the experimental. I al trying to use level-set, but this seems more instable than VOF. I am curious, since the couple Level-Set and VOF should give better results, right?

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November 20, 2011, 07:17		#2
xrs333 Senior Member xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 17	NO, not always.

November 20, 2011, 08:54		#4
xrs333 Senior Member xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 17	Fluent incorperated level-set into VOF from V13 on, and i believe the programmer had tested the code with a lot of cases, but the real flow is so complex that it is not reasonable you expect to get 'better' results just because of new method is used.