CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums

Blog Entries

Register Blogs Members List Search Today's Posts Mark Forums Read

Old

Hexa dominant meshing

Posted February 11, 2013 at 20:36 by diamondx

Quote:
Originally Posted by PSYMN View Post
Hex Dominant doesn't really play well with the other methods. You will also have a hard time when you try to merge it with the Hexa method, so you will need to do things in the right order...

Hex Dominant is also really more of an FEA method. It starts from the quad surface mesh and grows into the middle. If you don't have a quad surface mesh, it surface meshes everything first and then starts. It doesn't do the material point flood fill that the octree tetra mesher does. It
...
diamondx's Avatar
Super Moderator
Posted in Uncategorized
Views 870 Comments 0 diamondx is offline Edit Tags
Old

Turbine blade with filleting and tip clearance

Posted February 10, 2013 at 22:06 by diamondx

The periodicity (set under Mesh (tab) => Global Parameters) is to ensure that your mesh on one side matches the mesh on the other side... Once you see the DEZ (data entry zone), you will understand what you need to fill in. Periodicity is set on the geometry so that the generated mesh comes out periodic, so if you go back to set it, you must regenerate.

Even if you are copying your mesh around to create an annulus instead of a periodic section, it will be easier if you have...
diamondx's Avatar
Super Moderator
Posted in Uncategorized
Views 560 Comments 0 diamondx is offline Edit Tags
Old

Options... by simon

Posted February 10, 2013 at 22:01 by diamondx

The ICEM CFD Prism algorithm can not move hexa's out of the way as it inflates the prisms. Therefore, you need to make sure that you don't convert tetra to hexa before prism inflation.

With ICEM CFD, there are always other ways...

1) You could try a Hexa (blocking tab) mesh. This would be really easy if you really wanted to do a sphere in a box... What is your real application? Aircraft shapes, wings, etc. are also pretty easy to do with Hexa blocking. It gives...
diamondx's Avatar
Super Moderator
Posted in Uncategorized
Views 517 Comments 0 diamondx is offline Edit Tags
Old

TUI commands for animating air/water interface

Posted January 26, 2013 at 16:00 by diamondx

Good to know from zippyhybrid

Quote:
Originally Posted by zippyhybrid View Post
I'm not sure of a way to do that without having data files saved at previous time steps. I haven't used Fluent's tools to create animation, I've always saved contour plots as .png or .jpg images then used 3rd party tools to create animations. I create similar animations however since I am investigating air-lift driven flow and am interested in the behavior of bubbles in the airlift column. I'd suggest visualizing the interface using contours of phase
...
diamondx's Avatar
Super Moderator
Posted in Uncategorized
Views 817 Comments 0 diamondx is offline Edit Tags
Old

Gmsh Functions 1

Posted January 21, 2013 at 07:18 by Hisham (Notes for OpenFOAM!)
Tags gmsh

Gmsh is a powerful mesh generator. One of its strength points is the use of both scripting and GUI functionality. Scripting has two neat features: Function : lets one define a function and call it several times. Include : lets one include other scripts into the geometry file script.

Assume we have a Mesh.geo file that we have for the geometry. You can start off by:

Code:
Include "Functions.geo" ;
The Functions.geo file is a file that has some function...
Hisham's Avatar
Senior Member
Posted in Uncategorized
Views 1021 Comments 0 Hisham is offline Edit Tags

All times are GMT -4. The time now is 14:44.