# sliding mesh, confused me, help! help！

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 July 8, 2009, 03:33 sliding mesh, confused me, help! help！ #1 New Member   Wei Yang Join Date: Jul 2009 Location: Shanghai Posts: 4 Rep Power: 9 Hi,all: In CFD simulation for an airfoil, we usually give a velicoty in let and let the airfoil static. Now, I am doing a cfd simulation that let the air stable, the airfoil slids in a box. Yes, dynamic mesh method can do it. But I want to resolve it by using the sliding mesh method, for there are some articles describing studies for car and train in crossing action. When I set up the sliding mesh and run FLUENT, I found the box at which the airfoil is has a velocity specified for the airfoil wholly. While what I want is the airfoil has a velocity and moves forwards, the air around is static. Does the velocity of sliding mesh mean the velocity of each fluid element in that mesh? In another word, if one part of mesh is sliding at velocity V, is the fluid in that mesh also moving at velocity V? thanks!

 September 22, 2009, 21:14 #2 New Member   Wei Yang Join Date: Jul 2009 Location: Shanghai Posts: 4 Rep Power: 9 I have found the key. A stable result is need before carry sliding mesh simulation. And yes, the stable initialization means the whole flow holds a velocity of zero. Then let the sliding mesh work. It does work. The result brings some other question. The lift and the drag is not good,there is some difference from results of conventional CFD study. __________________ Wei Yang Ph.D. student Shanghai Automotive Wind Tunnel Center Tongji University Shanghai 201804 P.R. China

 September 30, 2009, 21:45 #3 Senior Member     YH Tan Join Date: Mar 2009 Location: Malaysia Posts: 119 Rep Power: 9 Your simulation on sliding mesh is interesting. I guess ur using the air above and below the airfoil to slide and have the mesh periodic. am i right? Can you share some of ur picture of simulation? u said there is differences with conventional CFD study, what is the difference? __________________ Herntan, Add Reputation if I am right

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20 alice FLUENT 3 February 21, 2012 06:53 ELYOR CD-adapco 1 June 30, 2008 08:54 lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09 Gopal FLUENT 1 July 14, 2005 04:30

All times are GMT -4. The time now is 00:23.

 Contact Us - CFD Online - Top