Meshing Volume between Cylinders

Sidewinder · March 23, 2010, 10:05

I was wondering if you could help me out with a problem I am having.

I would like to study flow between two eccentric cylinders. So I am using Gambit to mesh the model. So these are the steps I take:
1. create 2 volumes for both cylinders.
2. substract the inner volume from the outer volume.
3. Since I need to have an equal mesh around the cylinder. I then split the face of the of the inlet into two with two vertices. This allows me to mesh each face with the right density.
4. Then create the mesh over the volume using the meshed faces.
5. Once the boundary conditions are set, I then export the mesh.
6. But once I open it in fluent, the mesh has an error.

Here are the things, I think are going wrong. I should unite or merge the faces with the mesh, but if I do that the mesh disappers. I have also tried to connect the faces but to no success.

If anybody has any clue on how to solve this problem, please lend me a hand. I am new to this program and I need to have it done for an educational project.

Thanks!

-mAx- · March 24, 2010, 01:10

what kind of error fluent gives you?
can you post a picture of your model

Sidewinder · March 25, 2010, 13:42

The model!

-mAx- · March 26, 2010, 03:21

and what kind of error fluent returns?

Sidewinder · March 29, 2010, 07:58

Hey mAx,

I have solved the problem entirely. I created the volume and then meshed it. But using Cooper's method. I back-tracked the error to the volume mesh. You need to submap mesh the faces when using Cooper. I forgot to do this.

The other problem was also that the nodes created were not the same number on both surfaces. But thats sorted out too.

Thank you for help!

March 23, 2010, 10:05	Meshing Volume between Cylinders	#1
Sidewinder New Member Jon Join Date: Mar 2010 Posts: 10 Rep Power: 16	I was wondering if you could help me out with a problem I am having. I would like to study flow between two eccentric cylinders. So I am using Gambit to mesh the model. So these are the steps I take: 1. create 2 volumes for both cylinders. 2. substract the inner volume from the outer volume. 3. Since I need to have an equal mesh around the cylinder. I then split the face of the of the inlet into two with two vertices. This allows me to mesh each face with the right density. 4. Then create the mesh over the volume using the meshed faces. 5. Once the boundary conditions are set, I then export the mesh. 6. But once I open it in fluent, the mesh has an error. Here are the things, I think are going wrong. I should unite or merge the faces with the mesh, but if I do that the mesh disappers. I have also tried to connect the faces but to no success. If anybody has any clue on how to solve this problem, please lend me a hand. I am new to this program and I need to have it done for an educational project. Thanks!

March 24, 2010, 01:10		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	what kind of error fluent gives you? can you post a picture of your model __________________ In memory of my friend Hervé: CFD engineer & freerider

March 26, 2010, 03:21		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	and what kind of error fluent returns? __________________ In memory of my friend Hervé: CFD engineer & freerider

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March 29, 2010, 07:58		#5
Sidewinder New Member Jon Join Date: Mar 2010 Posts: 10 Rep Power: 16	Hey mAx, I have solved the problem entirely. I created the volume and then meshed it. But using Cooper's method. I back-tracked the error to the volume mesh. You need to submap mesh the faces when using Cooper. I forgot to do this. The other problem was also that the nodes created were not the same number on both surfaces. But thats sorted out too. Thank you for help!