CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM Running, Solving & CFD

Propeller mixing 2 phases

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

Like Tree1Likes

LinkBack Thread Tools Display Modes
Old   November 14, 2013, 07:45
Senior Member
Jens Höpken
Join Date: Apr 2009
Location: Duisburg, Germany
Posts: 156
Rep Power: 8
jhoepken is on a distinguished road
Send a message via Skype™ to jhoepken
Just a comment to the usage of snappy:

I usually generate two meshes seperately, when I use AMI/GGI.

Firstly I create the outer domain using blockMesh + snappyHexMesh. The volume where the propeller will be located later is cut out by snappyHexMesh, using a cylinder. For the cylinder I usually use a high res STL, I placed in paraview. Remember to use surfaceFeatureExtract on the cylinder, in order to get the edges.

Secondly I generate a mesh in a second case directory, using blockMesh, that has just the right size, that the cylinder fits in. Pay special attention to the fact, that cubic cells are essential for a good snapping. The edges of both the cylinder as well as the ones of the propeller must be extracted, using surfaceFeatureExtract. After having set up the snappyHexMeshDict, I start the meshing process.

This results in two meshes in two case directories and has the benefit of being able to optimize each mesh individually, with a comparatively short meshing time. The last step is to copy the first mesh's case to a third location and use mergeMeshes in that case, in order to merge the propeller mesh into this mesh. Unfortunately this results in just a single zone. Hence some topoSet commands must be executed to split the mesh into two cellZones.

If you need specific help with any of the above steps, just let me know. I am in a hurry right now.

Hope this helps,
Artur likes this.
jhoepken is offline   Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
What's is mixing law richard ben FLUENT 4 September 25, 2014 17:30
Propeller calculation toil CFX 14 December 19, 2012 05:12
Modelling a propeller tomg STAR-CCM+ 4 April 28, 2011 17:22
Meshing a Mixing Plane using ICEM Will Anderson FLUENT 0 November 6, 2010 18:08
Mixing plane geometry definition Hbet FLUENT 0 January 18, 2002 08:16

All times are GMT -4. The time now is 00:28.