CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Mesh Generation & Pre-Processing Software > Pointwise & Gridgen

How to fix severely non-orthogonal faces

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

Like Tree1Likes
  • 1 Post By bytesurfer

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 2, 2015, 12:03
Default How to fix severely non-orthogonal faces
  #1
New Member
 
Julian
Join Date: Dec 2015
Location: Berlin
Posts: 6
Rep Power: 6
bytesurfer is on a distinguished road
Hello,

I have a problem with severely non-orthogonal faces in my mesh.

At first a little bit about my case. For a CFD class in my university we are divided into groups, which work on different problems. In my group we have to calculate the stationary solution of two mixed vessels. One with a rushton-turbine and the other with a pitched blade agitator.

I meshed the model of the rushton-turbine (unstructured) with pointwise and tried to follow the "rushton turbine" example (and worked myself through their tutorials) from pointwise. If I check my mesh with examine -> "min. included angle" my highest included angle is 58.7. When I run checkMesh in OpenFoam it says: "Number of severely non-orthogonal (> 70 degrees) faces: 2768" and "Mesn non-orthogonality Max: 87.4 average: 21.9". I think that is the problem in my simulation and the reason my solver diverges.

Now my questions:
Is it possible to reduce the number of those faces with an option in pointwise?
Is "min. included angle" a good way to indicate non-orthogonal faces?

Attached are pictures of my pointwise mesh, the non-orthogonal faces (paraFoam) and the checkMesh-file.

For the population of the blocks I used T-Rex with the following parameters:
Max. Layers: 15
Full Layers: 1
Growth Rate: 1.3 (Push Attributes)
Isotropic Seed Layers: 0
Collision Buffer: 2
Max. Angle: 160
Centroid 0.6
Everything Else: Default

Thank you very much for your help!

P.S. If necessary I will upload my pointwise-file.

Regards
bytesurfer
Attached Images
File Type: png 1.PNG (122.0 KB, 60 views)
File Type: png 2.PNG (102.6 KB, 55 views)
File Type: jpg 3.jpg (203.0 KB, 54 views)
File Type: png 4.PNG (13.3 KB, 43 views)
Attached Files
File Type: docx checkMesh.docx (14.3 KB, 15 views)
elham usefi likes this.
bytesurfer is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[snappyHexMesh] SnappyHexMesh for internal Flow vishwa OpenFOAM Meshing & Mesh Conversion 24 June 27, 2016 08:54
decomposePar pointfield flying OpenFOAM Running, Solving & CFD 28 December 30, 2013 15:05
Possible Bug in pimpleFoam (or createPatch) (or fluent3DMeshToFoam) cfdonline2mohsen OpenFOAM 3 October 21, 2013 09:28
[Commercial meshers] fluentMeshToFoam multidomain mesh conversion problem Attesz OpenFOAM Meshing & Mesh Conversion 12 May 2, 2013 10:52
non orthogonal faces - numerical setup pepe.aero OpenFOAM Running, Solving & CFD 0 August 6, 2012 08:53


All times are GMT -4. The time now is 09:49.