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

[ICEM] Deleted elements after smoothing.

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 19, 2012, 19:36
Default Deleted elements after smoothing.
  #1
Member
 
Join Date: Sep 2011
Location: United Kigdom
Posts: 51
Rep Power: 5
federvo.mala is on a distinguished road
hello erveryone,

I am meshing a 180 deg volume around a wind turbine blade with Tetra

Details:
-Octree
-Edge criterion: 0.02
-Curvature/Proxmity Based Refinement: 0.01
-Build topology tolerance: 0.0001
All curves are red.

Scale factor:1
Max element: 10
Curve mesh setup: 0

The problem is that after the mesh is generated, I go through with some smoothing steps and elements near inlet/farfield and outlet/farfield boundaries get deleted, not really sure why (see pics).

I did notice that Mesh Lines have some gaps (See pics again)

Can anyone help me on this? I am not really familiar on reparing meshes.

Attached Images
File Type: jpg 1.JPG (96.6 KB, 17 views)
File Type: jpg 2.JPG (90.5 KB, 21 views)
File Type: jpg 3.JPG (55.6 KB, 19 views)
File Type: jpg 4.JPG (35.1 KB, 19 views)
File Type: jpg 5.JPG (60.8 KB, 16 views)
federvo.mala is offline   Reply With Quote

Old   February 20, 2012, 03:20
Default
  #2
New Member
 
Down
Join Date: Dec 2011
Posts: 4
Rep Power: 5
xiandjf is on a distinguished road
helle Malatesta:
when you smooth your mesh,there are some options in the list.i don't konw whether you have noticed that.you can choose one option to smooth some kinds of mesh and at the same time free or float the other.
maybe you can try this.
xiandjf is offline   Reply With Quote

Old   February 21, 2012, 17:27
Default
  #3
Member
 
Join Date: Sep 2011
Location: United Kigdom
Posts: 51
Rep Power: 5
federvo.mala is on a distinguished road
Quote:
Originally Posted by xiandjf View Post
helle Malatesta:
when you smooth your mesh,there are some options in the list.i don't konw whether you have noticed that.you can choose one option to smooth some kinds of mesh and at the same time free or float the other.
maybe you can try this.
Thanks xiandjf,

yes your suggestion helped me, also i decided not to go over quality value of 0.2 making the whole actual mesh better I believe.

Also running Build Mesh topology before smoothing seemed to repair many mistakes.

cheers
federvo.mala is offline   Reply With Quote

Old   February 25, 2012, 17:42
Default
  #4
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,662
Blog Entries: 1
Rep Power: 35
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
There is an option under smoothing to "coarsen". This option will merge nodes (which collapses elements) in order to improve quality...

But lets take a step back and look at your model. It looks like you have partial curves, which is why your model is crumbling in places. Perhaps it is a faceted model and you did not build topo with a low enough angle...

Also, there were lots of sliver elements that needed merging in the first place, perhaps all those faceted curve segements have points between them that are causing you troubles? I can't really tell from your pics...
__________________
-----------------------------------------
Please help guide development at ANSYS by filling in these surveys

Public ANSYS ICEM CFD Users Survey

This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)...

CFD Online Users Survey
PSYMN is offline   Reply With Quote

Reply

Tags
blade, icem cfd, mesh volume., smoothing, wind turbine

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
ICEM smoothing function and distorted elements Nick R ANSYS Meshing & Geometry 11 March 27, 2011 21:36
MESH ERROR Francesco - University of Florence, Italy CFX 2 April 24, 2008 11:10
Hexa smoothing (ICEM CFD 10.0) CFDworker CFX 3 November 2, 2005 11:23
CFX4.3 -build analysis form Chie Min CFX 5 July 12, 2001 23:19


All times are GMT -4. The time now is 20:07.