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

How surface tension affect delta t?

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 24, 2005, 22:04
Default How surface tension affect delta t?
  #1
Pei-Yng Hsieh
Guest
 
Posts: n/a
Hi,

For two fluid flow with strong surface tension (VOF method, no phase change), how does it affect determing delta t?

Is there any dimensionless number (such as Courant number) that can be used to roughly calculate the maximum delta t for stability (transient problem)?

Regards,

Pei
  Reply With Quote

Old   February 25, 2005, 00:55
Default Re: How surface tension affect delta t?
  #2
Junseok Kim
Guest
 
Posts: n/a
There is a nondimensional number related to surface tension effect, We, Weber number.

  Reply With Quote

Old   February 25, 2005, 09:54
Default Re: How surface tension affect delta t?
  #3
Pei-Ying Hsieh
Guest
 
Posts: n/a
HI, Junseok,

Thanks for the reply. I understand that Weber number is the ratio between inertia force and surface tension force. But, for CFD, how to use this number to calculate maximum delta t allowed?

Using Courant number as an example:

delta t = CFL * delta x / maximum velocity

Pei
  Reply With Quote

Old   February 25, 2005, 10:55
Default Re: How surface tension affect delta t?
  #4
Junseok Kim
Guest
 
Posts: n/a
Take a look at Mark Sussman1 and Elbridge Gerry Puckett's paper. You will find what you wanted.

Journal of Computational Physics 162, 301–337 (2000)

A Coupled Level Set and Volume-of-Fluid Method for Computing 3D and Axisymmetric Incompressible Two-Phase Flows
  Reply With Quote

Reply

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
[Gmsh] Problem with Gmsh nishant_hull OpenFOAM Meshing & Mesh Conversion 23 August 5, 2015 02:09
continuum surface tension model yukn Main CFD Forum 0 October 8, 2011 06:43
Surface Tension Test Cases sega OpenFOAM Running, Solving & CFD 2 March 8, 2011 12:19
How much surfactant affect surface tension qunwuhe@hotmail.com Main CFD Forum 0 June 7, 2007 05:01
CFX4.3 -build analysis form Chie Min CFX 5 July 12, 2001 23:19


All times are GMT -4. The time now is 11:16.