[Commercial meshers] How to separate fluid zones?

yurifrey · August 2, 2013, 09:46

Hello everyone!

I have a fluid domain which is separated into two zones (one of them should be set as porous) and I meshed it in gambit creating two different "continuum types". At the end of the .msh file there is

Code:

(0 "Zones:")
(45 (2 fluid zone2)())
(45 (3 fluid zone1)())
(45 (4 wall wall_in)())
(45 (5 wall wall_out)())
(45 (6 pressure-outlet outlet)())
(45 (7 velocity-inlet inlet)())
(45 (9 interior default-interior)())

so I guess the two zones are set correctly. When I convert the mesh to OF I lose this division and I can only find one cell zone as I can read from the cellZone file contained in polyMesh:

Code:

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

0
()

// ************************************************************************* //

Is there a problem in the mesh? Should I specify something in the conversion? Thank you for any help, I lost lot of time trying to fix this without succeeding..

Yuri

joegi.geo · August 8, 2013, 08:21

Hi,

If the mesh is 2d, you should use an option to preserve the zones (do not recall the option, just type -help). If the mesh is 3d, it should preserve the zones. At least it works for me with no problems.

jg

August 2, 2013, 09:46	How to separate fluid zones?	#1
yurifrey New Member Yuri Frey Join Date: Jul 2013 Posts: 13 Rep Power: 13	Hello everyone! I have a fluid domain which is separated into two zones (one of them should be set as porous) and I meshed it in gambit creating two different "continuum types". At the end of the .msh file there is Code: (0 "Zones:") (45 (2 fluid zone2)()) (45 (3 fluid zone1)()) (45 (4 wall wall_in)()) (45 (5 wall wall_out)()) (45 (6 pressure-outlet outlet)()) (45 (7 velocity-inlet inlet)()) (45 (9 interior default-interior)()) so I guess the two zones are set correctly. When I convert the mesh to OF I lose this division and I can only find one cell zone as I can read from the cellZone file contained in polyMesh: Code: // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 0 () // ************************************************************************* // Is there a problem in the mesh? Should I specify something in the conversion? Thank you for any help, I lost lot of time trying to fix this without succeeding.. Yuri

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August 8, 2013, 08:21		#2
joegi.geo Senior Member joegi Join Date: Nov 2009 Location: genoa Posts: 104 Rep Power: 17	Hi, If the mesh is 2d, you should use an option to preserve the zones (do not recall the option, just type -help). If the mesh is 3d, it should preserve the zones. At least it works for me with no problems. jg