CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > CFX

Free slip in CFX??

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

LinkBack Thread Tools Display Modes
Old   April 3, 2008, 12:14
Default Free slip in CFX??
Posts: n/a
Dear friends,

What is meant by "Free slip" in cfx?? how it differs from "no slip" condition?? PLZ reply.. Thanks in advance..

  Reply With Quote

Old   April 3, 2008, 12:35
Default Re: Free slip in CFX??
Posts: n/a
This is fundamental to fluid dynamics.... If this is not familiar to you I suggest you stop doing CFD work for a while and read a good book about viscous flow!

No slip -> Fluid velocity = 0 at stationary boundary. This is the usual condition for viscous flow at a wall.

Free slip -> Normal component of fluid velocity = 0 at stationary boundary. Tangential component of velocity can have any value.

The extension to moving boundaries is obvious: you consider velocity relative to the boundary and apply the rules above.


  Reply With Quote

Old   April 3, 2008, 14:12
Default Re: Free slip in CFX??
Posts: n/a

normally a no-slip condition is used in viscous flow calculation. If u are simulating a non-viscous fluid (for example an Euler flow) at the boundary u have that the fluid velocity is not zero. Anyway also in case of viscous flow u can have a slip boundary condition, for example in rarefied flow (e.g. high altitudes...)...



  Reply With Quote

Old   April 7, 2008, 04:53
Default Re: Free slip in CFX??
Posts: n/a
Thanks friends...
  Reply With Quote

Old   August 20, 2013, 23:34
Default free slip boundary condition for gas
New Member
Join Date: Jun 2012
Posts: 12
Rep Power: 7
mohamad3564 is on a distinguished road

I study gas- liquid bubble column. and I use free slip boundary condition for gas base on previous study. I want to understand why I have to use this
boundary condition for gas.
Thank you.
mohamad3564 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
Pros and Cons for CFX, CFdesign, COMSOL Val Main CFD Forum 3 June 10, 2011 02:20
free slip boundary conditions Yang Main CFD Forum 8 May 22, 2011 22:14
CFX pressure in Simulations problem nasdak CFX 1 April 14, 2010 13:22
PhD using CFX Rui CFX 9 May 28, 2007 05:59
Free rotating machinery CFX seminar ANSYS CFX Marketing CFX 0 October 6, 2003 11:14

All times are GMT -4. The time now is 08:44.