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

Surface Pressure Gradient at Heaving Airfoil in ANSYS Fluent

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

LinkBack Thread Tools Search this Thread Display Modes
Old   November 11, 2013, 04:17
Default Surface Pressure Gradient at Heaving Airfoil in ANSYS Fluent
New Member
Saif Ullah
Join Date: Aug 2011
Posts: 10
Rep Power: 14
saifullahkhalid is on a distinguished road
Hello Everyone!

I am trying to simulate flow over plunging airfoil in ANSYS Fluent. Using dynamic meshing, mesh becomes much distorted (sometimes to unacceptable limits) for high amplitude motion. To avoid this situation, accelerated reference frame method seems to be a good solution. For that matter, oscillating y-velocity component along with constant x-velocity is required to be given at inlet, upper and lower boundaries (in case of H- or C-grid). I have been following the work of Thomas Kinsey (University Laval, Quebec, 2011) and Ashraf (UNSW, Australia, 2010) where they have tried to implement this method in Fluent. I have faced a serious issue with this method while I am trying to use it for 1000 Reynolds number. The problem is the implementation of surface pressure gradient condition on airfoil described by Blacksburn and Henderson, 1999 ( ) . This boundary condition must be applied along the normal direction of airfoil. It relates this normal pressure gradient at the surface with the acceleration of airfoil. For accelerated reference frame, acceleration term has to be added as a source in y-momentum equation which I have already done. UDFs, used by these two PhDs are given at the end of their dissertation. Any help would be highly appreciated.

Thanks in anticipation!
saifullahkhalid is offline   Reply With Quote


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
vortex cause pressure gradient or pressure gradient induce vortex? fruitkiwi Main CFD Forum 4 June 12, 2012 01:12
Fluent natural ventilation pressure boundary condition pierresandre FLUENT 24 November 8, 2011 14:32
Inputting pressure gradient in Fluent Josyula FLUENT 2 December 23, 2009 07:26
How to plot pressure gradient in Fluent? jrg FLUENT 3 November 12, 2007 04:48
Gas pressure question Dan Moskal Main CFD Forum 0 October 24, 2002 22:02

All times are GMT -4. The time now is 07:07.