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

microfluid: slip wall condition

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 5, 2009, 05:43
Default microfluid: slip wall condition
  #1
New Member
 
Join Date: Jul 2009
Posts: 2
Rep Power: 0
hoola is on a distinguished road
Hi all!

Anyone know how to set a slip wall condition in FLUENT?

Under the wall boundary condition, we can choose between no-slip or specified shear. Is specified shear relevant? How about specularity coefficient and Marangoni stress?

Please help!!

Thanks!!
hoola is offline   Reply With Quote

Old   July 5, 2009, 10:37
Default
  #2
New Member
 
Join Date: Jul 2009
Posts: 2
Rep Power: 0
hoola is on a distinguished road
I found the way to set slip wall condition in FLUENT. According to FLUENT 6.3 User's Guide, 7.13 Wall Boundary Conditions:

"... In viscous flows, the no-slip boundary condition is enforced at walls by default, but you can specify a tangential velocity component in terms of the translational or rotational motion of the wall boundary, or model a "slip'' wall by specifying shear. (You can also model a slip wall with zero shear using the symmetry boundary type ..."

Experts, please leave your comment!!

Now another problem has appeared, for microfluids, slip velocity boundary condition at wall is given by Maxwell equations. Apparently, the shear is not zero at the wall but not as big as the shear under no-slip condition.

If anyone got the idea to implement the Maxwell equations to set the slip wall condition, please share with us.

Thanks!
hoola is offline   Reply With Quote

Reply

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
no-slip wall boundary condition Atit Koonsrisuk CFX 3 July 10, 2014 17:10
How to set rotating wall as boundary condition babu FLUENT 7 December 14, 2013 05:48
Pressure on the free slip wall yliu CFX 5 March 30, 2007 03:47
How to write udf of slip wall condition cxzhao FLUENT 0 April 27, 2005 21:20
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13


All times are GMT -4. The time now is 18:38.