CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

Vortex-Induced Vibration Simulation

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 15, 2016, 10:49
Default Vortex-Induced Vibration Simulation
  #1
New Member
 
Jack Callaghan
Join Date: Oct 2015
Posts: 2
Rep Power: 0
jack.callaghan is on a distinguished road
Hi all,

For a project at University I am working on modelling vortex-induced vibrations of a pivoted cylinder in a water flow channel. So far I have determined three possible methods for doing this:
  1. Fluent / Transient Mechanical System Coupling
  2. Fluent Rigid Body Dynamic Mesh
  3. CFX Immersed Solid w/ Rigid Body Dynamics

I am having different problems with all three.
For (1) the solution is very labour intensive, and I do not have access to higher computing power.
For (2) the dynamic mesh often distorts to a degree that the mesh is no longer an accurate representation of the domain.
For (3) the motion of the cylinder often leaves the fluid domain, which in reality is impossible.

I am not looking for a definitive solution to this problem, but ask for advice from those who have tried similar simulations with what I might try to accurately model this system.

Regards,
Jack Callaghan
jack.callaghan is offline   Reply With Quote

Old   February 16, 2016, 15:19
Default
  #2
New Member
 
Marcus Timgren
Join Date: Feb 2016
Location: Sweden
Posts: 11
Rep Power: 8
Reeb is on a distinguished road
Hi Jack,

Have you tried doing a FSI simulation using CFX? I did a project for 2,5 years ago and I think that it worked better than FSI with Fluent. If I remember correctly it was not straight forward to get it to work but eventually it worked.

Have you tried any other software that is easier to setup when it comes to FSI simulations? I have used LS-DYNA and when the fluid and structural parts are defined the FSI coupling is activated with one simple command. Their probably exist other similar solvers also but non that I can the name of.

Best regards,
Marcus Timgren
Reeb is offline   Reply With Quote

Old   February 17, 2016, 08:42
Default
  #3
New Member
 
Jack Callaghan
Join Date: Oct 2015
Posts: 2
Rep Power: 0
jack.callaghan is on a distinguished road
Hi Marcus,

Thanks for the reply.
Correct me if I am wrong but I think method 3 I defined is using FSI in CFX.
Do you know of any tutorial for the method you used so I might compare and see if I am doing anything wrong?

I do not have access to any other CFD software than ANSYS Mechanical, Fluent, and CFX.

Regards,
Jack Callaghan
jack.callaghan is offline   Reply With Quote

Old   February 18, 2016, 03:46
Default
  #4
New Member
 
Marcus Timgren
Join Date: Feb 2016
Location: Sweden
Posts: 11
Rep Power: 8
Reeb is on a distinguished road
Hi Jack,

If I have understood you correctly, you do not couple the CFX to ansys mechanical? If I remember correctly I use an approach similar to this https://youtu.be/jNjYuw9mznA.

Also take a look at look at chapter 5 in the following guide, it contains some good advice on how a 2-way FSI simulation is setup. http://148.204.81.206/Ansys/150/ANSY...ce%20Guide.pdf

I hope that this will help you.

Best regards,
Marcus
Reeb is offline   Reply With Quote

Reply

Tags
cfx, fluent, fsi, viv

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
Numerical simulation of DBD plasma actuator induced flow mukut OpenFOAM 5 January 7, 2014 06:30
Openfoam Vortex and Whirlpool simulation qolt45 OpenFOAM Running, Solving & CFD 1 October 25, 2013 10:58
Vortex Induced Vibration (VIV) modelling Kwong FLUENT 1 December 1, 2009 14:08
vortex induced vibration dorin CFX 11 December 1, 2009 14:03
problem with vortex shedding simulation Le Stanc Main CFD Forum 6 November 1, 2006 14:08


All times are GMT -4. The time now is 12:54.