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-   -   Gambit Axisymmetric Neutral File Problem (http://www.cfd-online.com/Forums/openfoam/79344-gambit-axisymmetric-neutral-file-problem.html)

SandyS August 20, 2010 09:51

Gambit Axisymmetric Neutral File Problem
 
Hello,

I am trying to convert an axisymmetric mesh from a Gambit mesh to OpenFoam. I have created a wedge-shaped 3-D model of a nozzle in Gambit, and have created all the 2D boundaries: inlet, outlet, frontAndBack, and top (= 5 degree curved outer surface of the nozzle). I also created a 1D boundary called "axis" from the edges along the axis of symmetry.

However, when I export a neutral file (*.neu) from Gambit (solver set to "generic") to convert to OpenFoam, it does not export the axis boundary element properly, and gives an error "Boundary entity axis does not contain any valid entity and is not written." The .neu file created has all the other boundaries defined, but not axis.

Can anyone help?
Thanks,
Sandy

mirko August 30, 2010 16:42

Quote:

Originally Posted by SandyS (Post 272177)
Hello,

I am trying to convert an axisymmetric mesh from a Gambit mesh to OpenFoam. I have created a wedge-shaped 3-D model of a nozzle in Gambit, and have created all the 2D boundaries: inlet, outlet, frontAndBack, and top (= 5 degree curved outer surface of the nozzle). I also created a 1D boundary called "axis" from the edges along the axis of symmetry.

However, when I export a neutral file (*.neu) from Gambit (solver set to "generic") to convert to OpenFoam, it does not export the axis boundary element properly, and gives an error "Boundary entity axis does not contain any valid entity and is not written." The .neu file created has all the other boundaries defined, but not axis.

Can anyone help?
Thanks,
Sandy

My Gambit axisymmetric geometry did not include the 1D axial boundary. Conversion to OF and simulation went fine. So you may want to delete that boundary and proceed without it.

Mirko

SandyS October 14, 2010 14:43

Gambit Problems
 
Hi Mirko,

Thanks for your reply, and sorry to take so long getting back to you. I will give your suggestion a try, but I think that is where I started, with no 1-D boundary along the axis. I'll have to check.

Cheers,
Sandy

palmerlee March 25, 2014 08:01

Hi, Mirko!

How do you convert a gambit mesh to OpenFOAM axisymmetric mesh? Is your gambit mesh a wedge-shaped 3-D mesh or a 2-D mesh?

Kind regards,
Peter

palmerlee March 25, 2014 08:08

Hi, Mirko!

How do you convert a gambit mesh to OpenFOAM axisymmetric mesh? Is your gambit mesh a wedge-shaped 3-D mesh or a 2-D mesh?

Kind regards,
Peter


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