CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Meshing & Mesh Conversion

[snappyHexMesh] On which patches to set BC's for snappyHexMesh ?

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

LinkBack Thread Tools Search this Thread Display Modes
Old   November 8, 2015, 18:25
Default On which patches to set BC's for snappyHexMesh ?
New Member
Tom Alderweireldt
Join Date: Jan 2015
Location: Schilde, Belgium
Posts: 14
Rep Power: 10
Talder is on a distinguished road

three questions actually:
I'm trying to mesh an internal flow Venturi nozzle domain with snappyHexMesh. My STL file works fine (3 new patches created : inlet, outlet and walls).

1) Should I remove the BC's on the outside patches or leave them ? They have no purpose if you're modelling an internal flow.
(so only add boundary conditions for the new internal domain patches?)

2) The first results after castellated and snapped mesh look a bit strange to me. I was expecting a filled up 3D volume packed with many hex-cells, but when I look through the nozzle I see only very few cells, only around the walls, inlet and outlet patches. Did I miss something in order to obtain a fully meshed 3D volume ? (see image attached)

3) part of the surrounding background walls also got refined meshes, which I did not expect. Could this be related to a leaking mesh for my venturi nozzle, although I used the same circle for inlet/outlet patches as for the wall edges.

Best Regards,
Attached Images
File Type: png venturi-castellated.png (134.8 KB, 16 views)
Talder is offline   Reply With Quote


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
[ICEM] ICEM Scripting Issues tylerplowright ANSYS Meshing & Geometry 33 September 27, 2021 16:35
How to set up BCs for k epsilon model Julian K. OpenFOAM Pre-Processing 44 October 26, 2015 09:23
How to set a initial temperature and constant heat flux at same BC's?? Jane FLUENT 4 October 25, 2015 12:01
[snappyHexMesh] determining displacement for added points CFDnewbie147 OpenFOAM Meshing & Mesh Conversion 1 October 22, 2013 09:53
problem of four patches set to cyclic boundary bryant_k OpenFOAM 9 September 22, 2013 12:42

All times are GMT -4. The time now is 04:25.