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

Dynamic Mesh Failing

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 13, 2019, 23:11
Default Dynamic Mesh Failing
  #1
New Member
 
Join Date: Mar 2019
Posts: 3
Rep Power: 5
quada is on a distinguished road
I have an issue with my dynamic mesh in fluent. I have a thin wall (~0.10mm) with one surface moving and one stationary. When the one wall moves, I only get ~0.3mm worth of movement before the error:



Error: Update-Dynamic-Mesh failed. Negative cell volume detected.


When previewing the mesh motion it looks like the elements are only stretching but they are not remeshing. My dynamic mesh settings are:


Smoothing and Remeshing checked.


Smoothing - Spring/Laplace/BL
Spring constant factor - 0.1
Convergence tolerance - 0.0001
Number of iterations - 100
Elements - all
Laplace node relaxation - 1


Remeshing methods - 2.5D only
sizing functions checked with 1 resolution, 344 variation, 0.7 rate
parameters:
min length scale (m) - 0.000142
max length scale (m) - 0.098486
max cell skewness 0.95
max face skewness 0.95
size remeshing interval - 2


I think it's a problem with skewedness as if I check mesh info the skewedness is already at 0.999. I've already tried remeshing with a skewedness target of 0.4 but that did not positively affect the results.


Are there any settings I could change to avoid this error? A quick snapshot of the mesh is attached.
Attached Images
File Type: png mesh.PNG (24.1 KB, 8 views)
quada is offline   Reply With Quote

Old   March 17, 2019, 18:28
Default
  #2
New Member
 
Join Date: Mar 2019
Posts: 3
Rep Power: 5
quada is on a distinguished road
Any advice?
quada is offline   Reply With Quote

Old   April 7, 2019, 15:23
Default
  #3
New Member
 
Join Date: Mar 2019
Posts: 3
Rep Power: 5
quada is on a distinguished road
up


10characters
quada is offline   Reply With Quote

Reply

Tags
dynamic, error, fluent, mesh, meshing

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
Ship resistance shows wiggles when using Overset mesh and dynamic mesh in Fluent Qingsong FLUENT 2 March 21, 2022 16:08
Dynamic Mesh on Pintle type injector. herntan FLUENT 16 September 4, 2020 09:27
Sliding / Dynamic Mesh in heat transfer problem platzhalter FLUENT 0 May 7, 2018 06:25
Dynamic Mesh "Shadow Wall" thezack FLUENT 0 June 4, 2013 23:09
dynamic mesh for drop interface IndrajitW FLUENT 0 March 30, 2013 09:03


All times are GMT -4. The time now is 21:03.