CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Generate a perturbation

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

LinkBack Thread Tools Display Modes
Old   April 21, 2010, 02:02
Question Generate a perturbation
pranab_jha's Avatar
Pranab N Jha
Join Date: Nov 2009
Location: Houston, TX
Posts: 86
Rep Power: 10
pranab_jha is on a distinguished road
Hello Friends,

I want to model a wave propagating in a pipe with two fluids (air and water) flowing. I was able to simulate stratified flow using VOF. My aim is to generate a perturbation at the inlet (velocity inlet BC) and observe its propagation on the free surface with variation in velocities of air and water. I read the "wave generation in a tank" tutorial but it has a moving boundary which I do not want. (Here is the link:

How can I achieve my aim without a moving boundary. Should I use a UDF? If yes, can anyone help me write a simple UDF for a small perturbation at the inlet at time t=0, as I have had no prior experience with it. Also, please let me know if I can use the UDF that comes along with the wave-tutorial package by editing it?

pranab_jha is offline   Reply With Quote


perturbation, udf, vof

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
generate Waves in openfoam anon_c OpenFOAM 30 November 16, 2016 02:48
Need someone to generate mesh RA FLUENT 7 May 4, 2007 11:36
How to generate a atmospheric boundary layer Morten Andersen CFX 3 January 16, 2007 07:48
Inlet perturbation Linfeng Main CFD Forum 0 March 10, 2004 05:49
how to generate postscript file? leo Siemens 6 May 27, 2003 23:38

All times are GMT -4. The time now is 23:18.