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

Split Mesh Domain into Rotor + Diffuser

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 12, 2017, 08:28
Default Split Mesh Domain into Rotor + Diffuser
  #1
Senior Member
 
M
Join Date: Dec 2017
Posts: 375
Rep Power: 7
AtoHM is on a distinguished road
Hello,
this is my first post here, I appreciate every help and try to be clear with what I was going for.

I'am trying to setup a turbine flutter simulation. The whole domain (see attachment) consists of an inlet (quite close to the vane row), vane row itself, blade row and an outlet part which extends quite long in axial direction. Using DesignModeler I was able to extract a mesh for the vane including the inlet part and a mesh for rotor and outlet.
For my flutter setup I need to run a stationary simulation first. This was done successfully. Here comes my problem: I want to perform the flutter case with ONLY the rotor part. Naturally, there is an interface region between vane and blade row because of pitch change and reference frame change. So I can easily extract pressure and temperature profiles here to use them as inlet bc for the rotor domain in flutter simulation. Unfortunately, I haven't found a way to introduce a surface at which I can cut the mesh for the flutter simulation.
A potential workaround would be to completely model with 3 separate domains, but then I have no idea on how to get the diffusor meshed w/o it containing a blade. Any suggestions?
Attached Images
File Type: png setup.PNG (120.3 KB, 29 views)
AtoHM is offline   Reply With Quote

Old   December 12, 2017, 08:44
Default
  #2
Senior Member
 
M
Join Date: Dec 2017
Posts: 375
Rep Power: 7
AtoHM is on a distinguished road
Oh wow, we found the error. This can be closed.

In turbogrid rotor mesh file under mesh data, there is an on-off switch for each inlet and outlet domain. Enabling outlet domain there and moving the "fully extend" choice in Geometry->Outlet to something else, a surface can be set at which rotor and outlet domain are split and meshed separately.
AtoHM is offline   Reply With Quote

Reply

Tags
diffuser, mesh 3d, turbogrid

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
Gambit problems Althea FLUENT 22 January 4, 2017 03:19
sliding mesh problem in CFX Saima CFX 45 September 22, 2015 10:53
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20
Floating point exception: Zero divide liladhar CFX 11 December 16, 2013 04:07
injection problem Mark New FLUENT 0 August 4, 2013 01:30


All times are GMT -4. The time now is 15:19.