CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > ANSYS Meshing & Geometry

[TurboGrid] Differing Layer Topology Causes Negative Volume Cells

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 14, 2020, 17:05
Default Differing Layer Topology Causes Negative Volume Cells
  #1
New Member
 
Tate
Join Date: Feb 2015
Posts: 29
Rep Power: 7
t8fanning is on a distinguished road
I'm trying to generate a mesh for a centrifugal compressor with a main and splitter blade. I've done it before with very similar geometry and no problems. However, this time, I'm having an issue where the topology for layers above a span of 62.5% cross each other and cause negative volume cells.

This only happens when I attempt to mesh the main and splitter blades. When I use only the main or only the splitter no topology problems present.

I have not been able to find a way to edit the topology control points with Turbogrid 17.2. Does anyone have any ideas how to fix the problematic layers?

Some pictures of the layer topologies follow.

Hub:


37.5% span:


75% span:


Shroud:
t8fanning is offline   Reply With Quote

Old   May 14, 2020, 17:43
Default
  #2
New Member
 
Tate
Join Date: Feb 2015
Posts: 29
Rep Power: 7
t8fanning is on a distinguished road
After fiddling around with the order in which I generated the export points feature from designmodeler, I've found some interesting points.

Turbogrid created a consistent topology for each layer only when the export points feature got the blade info from the flow path and I manually entered the blade surfaces. However, once I changed anything else in Turbogrid, topology changed and was poor. When I tried to give export points blade info from the blade feature, it created poor topology.
t8fanning 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
SimpleFoam & Theater jipai OpenFOAM Running, Solving & CFD 3 June 18, 2019 10:11
[snappyHexMesh] Error snappyhexmesh - Multiple outside loops avinashjagdale OpenFOAM Meshing & Mesh Conversion 53 March 8, 2019 09:42
how to set periodic boundary conditions Ganesh FLUENT 14 November 26, 2018 11:26
[blockMesh] Create internal faces as patch in blockMesh m.delta68 OpenFOAM Meshing & Mesh Conversion 14 July 12, 2018 14:43
Negative volume cells nbons STAR-CCM+ 2 January 27, 2015 12:18


All times are GMT -4. The time now is 08:47.