Laminar&Turbulent_Part 2

Miroo · August 19, 2009, 06:25

Hi guys,

My small problem is the connection between laminar and turbulent region.
There is no general solution for relaminarisation. But if I have an rectangular
duct with a turbulent flow, (I can solve this with simpleFoam) and after this duct is a another rectangular duct wehre the flow must be laminar.
Now I need a new solver...
One geometry (2 blocks) with 2 region of flow and I always know what kind of flow is in every part!

How can I solve this problem when I need more different solvers?

Thanks

Zowie · August 19, 2009, 08:43

I am not sure I understood your problem.... But I would say that you just need a turbulent solver. As far as I know, using a turbulent solver doesn't necessarily mean that the flow in the whole domain is turbulent.

Miroo · August 19, 2009, 09:10

Thanks man.
At the beginning I tried it, and it is very important to know where
is turbulent and where laminar flow.

The problem is:

When your geometry jumps from turbulent region to laminar reagion. So you need two solvers, for example: simpleFoam and then icoFoam.
So, how can I combine this two solvers in one problem?

August 19, 2009, 06:25	Laminar&Turbulent_Part 2	#1
Miroo New Member Miro Join Date: Aug 2009 Posts: 14 Rep Power: 16	Hi guys, My small problem is the connection between laminar and turbulent region. There is no general solution for relaminarisation. But if I have an rectangular duct with a turbulent flow, (I can solve this with simpleFoam) and after this duct is a another rectangular duct wehre the flow must be laminar. Now I need a new solver... One geometry (2 blocks) with 2 region of flow and I always know what kind of flow is in every part! How can I solve this problem when I need more different solvers? Thanks

August 19, 2009, 08:43	Use a turbulent solver	#2
Zowie New Member Oscar Join Date: Jun 2009 Location: Murcia, Spain Posts: 14 Rep Power: 16	I am not sure I understood your problem.... But I would say that you just need a turbulent solver. As far as I know, using a turbulent solver doesn't necessarily mean that the flow in the whole domain is turbulent.

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August 19, 2009, 09:10	Hi	#3
Miroo New Member Miro Join Date: Aug 2009 Posts: 14 Rep Power: 16	Thanks man. At the beginning I tried it, and it is very important to know where is turbulent and where laminar flow. The problem is: When your geometry jumps from turbulent region to laminar reagion. So you need two solvers, for example: simpleFoam and then icoFoam. So, how can I combine this two solvers in one problem?