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

Vortex Induced vibration of subsea pipeline

Register Blogs Community New Posts Updated Threads Search

Like Tree2Likes
  • 2 Post By Mobasheri

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 2, 2006, 10:56
Default Vortex Induced vibration of subsea pipeline
  #1
Mobasheri
Guest
 
Posts: n/a
Hi,

I am trying to model the vortex induced vibration for subsea pipeline. basically the flow over the subsea pipeline creates vortex which cuases the pipe to vibrate. What i have done so far i have a created a 2d model of a pipe within a square and passed the flow over it. But becuase the pipe in the middle is fixed it wont create any vortexs. I was wondering if anyone could help me. I am not really an expert in fluent and have only been using it for a short while.
  Reply With Quote

Old   February 2, 2006, 11:05
Default Re: Vortex Induced vibration of subsea pipeline
  #2
HVN
Guest
 
Posts: n/a
You should have vortices even if the pipe is fixed.
  Reply With Quote

Old   February 2, 2006, 11:20
Default Re: Vortex Induced vibration of subsea pipeline
  #3
Mobasheri
Guest
 
Posts: n/a
can you have a look at this document Page 5, I am after to get vortex like that. But what i am getting is just showing a vortex around the pipe wall. do I need to use dynamic mesh for this case?
  Reply With Quote

Old   February 3, 2006, 06:38
Default Re: Vortex Induced vibration of subsea pipeline
  #4
HVN
Guest
 
Posts: n/a
which document?
  Reply With Quote

Old   February 4, 2006, 20:40
Default Re: Vortex Induced vibration of subsea pipeline
  #5
Fabio Saltara
Guest
 
Posts: n/a
First of all, you should study the Fluent tutorial about the flow around a circular cylinder. In this tutorial you can learn how to obtain vortex-shedding and calculate the Strouhal number.

One reason why you are not detecting vortex-shedding in your simulation may be the discretization of the convective terms in the Navier-Stokes equation. In general, first-order upwind and power-law interpolation generate false-diffusion and make difficult to simulate vortex-shedding. You must use at least second-order schemes.
  Reply With Quote

Old   February 9, 2006, 08:07
Default Re: Vortex Induced vibration of subsea pipeline
  #6
Mobasheri
Guest
 
Posts: n/a
I have access to Fluentusers.com website, but could not find any tutorial regarding "flow around a circular cylinder". Do you know where I can find this tutorial ? thank you
  Reply With Quote

Reply


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
vortex induced vibration Simon Wang FLUENT 4 December 25, 2017 04:23
vortex induced vibration from dynamic mesh natto Main CFD Forum 4 April 18, 2015 20:42
vortex induced vibration dorin CFX 11 December 1, 2009 14:03
Vortex Induced Vibration modelling Kwong FLUENT 0 March 24, 2007 01:41
"bit" phenomenon in Vortex Induced Vibration? JOEY Main CFD Forum 0 August 4, 2006 09:49


All times are GMT -4. The time now is 02:39.