CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Dynamic mesh

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

LinkBack Thread Tools Display Modes
Old   March 7, 2013, 06:18
Default Dynamic mesh
New Member
Join Date: Mar 2013
Posts: 5
Rep Power: 6
Arty is on a distinguished road
I am not really a Fluent whiz, so, here is a question:
Is it ok to make a two-way FSI considering a gas compressor blade using Fluid Flow (Fluent) with Dynamic Mesh turned off or the Fsi doesn't make sence in this case?
I did not use dynamic mesh because otherwise I got messages about negative cell volume and I'm tired trying to make it positive)).
Arty is offline   Reply With Quote

Old   March 7, 2013, 08:15
Anton Lyaskin
Join Date: Mar 2009
Location: Samara, Russia
Posts: 66
Rep Power: 10
A_Lyaskin is on a distinguished road
When you turn off dynamic mesh, you get one-way FSI instead of two-way. So it's better to find the reason of negative cell volume messages. Usually it means that your time step is too big. Or you've messed something in dynamic mesh methods...
A_Lyaskin is offline   Reply With Quote

Old   March 7, 2013, 10:48
New Member
Join Date: Feb 2013
Posts: 11
Rep Power: 6
fluent87 is on a distinguished road
try to change the layer dimension (from dynamic mesh menu) or the mesh cell dimension . Usually there is a problem in the dynamic mesh direction. Tray to create a mesh for layer (on a plane e extrude for alla lenght).

fluent87 is offline   Reply With Quote

Old   March 7, 2013, 23:01
New Member
Join Date: Mar 2013
Posts: 5
Rep Power: 6
Arty is on a distinguished road
Thanks for the replies guys.
I think that the time step is small enough, and so I tried different Mesh Methods, but there is a new problem:
Couldn't intersect threads 7 and 8.
Can you tell what's this about?

By the way, I didn't really get anything about layer dimension or the mesh cell dimension, or a mesh for layer. I looked through the fluent tabs, but didn't find anything about, so could you tell me what you meant?
Arty is offline   Reply With Quote


2-way fsi, dynamic mesh, fluent, negative cell volume

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
Incylinder dynamic mesh with volumetric reaction mas FLUENT 4 May 3, 2012 10:22
Dynamic Mesh on Pintle type injector. herntan FLUENT 15 January 4, 2012 04:31
pls help. mesh collapsed with dynamic mesh. wlt_1985 FLUENT 1 July 28, 2011 01:53
dynamic mesh on a hexa grid Manoj Kumar FLUENT 0 August 21, 2007 07:41
Dynamic mesh + grid adapt = Crash! (Files included BillH FLUENT 4 July 24, 2007 15:31

All times are GMT -4. The time now is 23:07.