CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Stationary mesh interface causing divergence in FSI sim.

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

LinkBack Thread Tools Display Modes
Old   May 6, 2016, 17:21
Question Stationary mesh interface causing divergence in FSI sim.
Kegan Leckness
Join Date: Mar 2015
Posts: 38
Rep Power: 4
KeganLeckness is on a distinguished road
Hi all,

EP Chamber malfunction.jpg

I'm modeling a complex system that includes pipe flow. The pipe is in sections such that the fluid in the pipe meets another fluid zone via fluid-fluid interfaces. [The fluid domain of the pipe must be in separate sections for dynamic remeshing settings purposes.] What's happening is the outside surface of the fluid is in motion with the structure of the pipe via FSI, but the faces of the fluid-fluid interfaces remain stationary such that part of the domain is moving, and part of it isn't, which results in poor element quality/divergence. The image above shows the deformation of a small section of the pipe's fluid domain.

How might I avoid this circumstance? I want the fluid-fluid interfaces (and fluid zones between them) to move with the structure - I do not want stationary interfaces. The motion of the pipe's structure is not known; I want the fluid-fluid interfaces to move freely as I cannot predict what their motion should be.

Thank you,
KeganLeckness is offline   Reply With Quote


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
CFX FSI Fatal Error unbanana CFX 0 October 3, 2015 05:57
Mesh refinement and smooth interface shape Prosper OpenFOAM Meshing & Mesh Conversion 2 May 5, 2015 15:21
Error finding variable "THERMX" sunilpatil CFX 8 April 26, 2013 07:00
how to extend FSI 2D codes to 3D, need advises abouziar Main CFD Forum 1 May 30, 2008 04:08
Icemcfd 11: Loss of mesh from surface mesh option? Joe CFX 2 March 26, 2007 18:10

All times are GMT -4. The time now is 06:24.