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

3D Wing Analysis

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

Like Tree2Likes
  • 2 Post By kartikkp

Reply
 
LinkBack Thread Tools Display Modes
Old   July 29, 2004, 14:10
Default 3D Wing Analysis
  #1
Ed
Guest
 
Posts: n/a
Hello All: I am trying to do an analysis of a 3D wing as a learning experience toward my ultimate goal of analysis of a complete aircraft. Here is how I am approaching the problem so far:

1) Create a wing in Gambit 2) Create a domain around the wing (basically just a big box, much much bigger than the wing) 3) Subtract the wing volume from the domain volume 4) ...

This is where I'm stuck. I keep trying to mesh this volume with different options and procedures, but I can't get a good mesh. I tried meshing the surface of the wing first, with a small interval size and then meshing the volume, but it wouldn't do it.

I'm a complete Fluent/Gambit virgin. I've gone through the tutorials that Fluent offers on their website, but that is about the extent of my knowledge. Does anyone know of a good online tutorial to accomplish what I'm trying here? It would be nice to have something to follow along for the first try. Thanks!
  Reply With Quote

Old   July 30, 2004, 02:34
Default Re: 3D Wing Analysis
  #2
anindya
Guest
 
Posts: n/a
This website should help you.

http://www.enseeiht.fr/hmf/travaux/C...nual/index.htm
  Reply With Quote

Old   July 30, 2004, 06:00
Default Re: 3D Wing Analysis
  #3
James Date
Guest
 
Posts: n/a
Hi

Creating a good 3D mesh using Gambit around an aerofoil is quite a challenge. Your best bet is to create nice structured Hex blocks around the wing, only using Tet filled blocks in the difficult regions i.e the tip.

From experience doing a Boolean operation i.e. taking the wing away from a square block always produces a poor mesh.

Regards James
  Reply With Quote

Old   August 3, 2004, 17:05
Default Re: 3D Wing Analysis
  #4
Ed
Guest
 
Posts: n/a
So you would create some volumes around the leading edge and maybe the ends of the wing and fill them with tetrahedral elements, then mesh the area moving away from the wing with increasingly coarse hex elements?

I've got a mesh made right now (maybe not the best mesh that it could be, but at least something to start with). I'm wondering now what the best solver setup is to use for this sort of flow? I.e. coupled vs. segregated and what turbulence model. My analysis is at 35.7 m/s (80 mph) and sea level air. The chord length is .1 m, so it equates to Re~=245000. I've tried a few hundered iterations of different solver setups, but I can't seem to find one that comes even close to theoretical predictions for this test case.
  Reply With Quote

Old   August 17, 2004, 14:01
Default Re: 3D Wing Analysis
  #5
Pavel
Guest
 
Posts: n/a
Hi Ed.....

The solver and the viscous model depends directly of the precision in the analysis that you want.

What are you interested in ???

Just the forces in the wing ....Lift ? Drag....? or the pressure field in the wing ? ....

Or are you interested in the flow profile like the vortex, and induced drag ????

If you decide the level accuracy you can choose between k-epsilon and RSM for your analysis....
  Reply With Quote

Old   April 30, 2009, 14:00
Default
  #6
New Member
 
Kartik
Join Date: Apr 2009
Posts: 4
Rep Power: 8
kartikkp is on a distinguished road
hi ED and everyone!

I would love to see if there was some work accomplished on 3d Finite wings,
I am working on something similar to what you have done Ed!

Please help me
kartik
kartikkp is offline   Reply With Quote

Old   April 30, 2009, 15:29
Default
  #7
Member
 
ANIL
Join Date: Apr 2009
Posts: 35
Rep Power: 8
makaero is on a distinguished road
Hi ED,

After subtracting the wing from domain...4)apply Size function 5)mesh wing faces
6)appply BL 7)mesh volume(cuboid)

these are the steps i followed...but im getting coarse mesh inorder to avoid highly skewed elements at trailing edge.
even i got struck at the same point with the flow analysis, tried many iterations with
models and solver.
if u get good result with fluent let me know.
makaero is offline   Reply With Quote

Old   April 1, 2010, 14:11
Default
  #8
New Member
 
Join Date: Sep 2009
Posts: 3
Rep Power: 7
sharensla is on a distinguished road
Hi,

wat shud be the boundary conditions in gambit for 3Dwing analysis??
sharensla is offline   Reply With Quote

Old   April 1, 2010, 22:54
Default
  #9
New Member
 
Kartik
Join Date: Apr 2009
Posts: 4
Rep Power: 8
kartikkp is on a distinguished road
Please read my thesis work for details on boundary condition to be used in gambit and fluent

http://dspace.uta.edu/bitstream/hand...pdf?sequence=1

If u have any doubts you may email me at kkadakia2009@gmail.com
shk12345 and MANOJ like this.
kartikkp is offline   Reply With Quote

Old   April 3, 2010, 03:28
Default
  #10
New Member
 
Join Date: Sep 2009
Posts: 3
Rep Power: 7
sharensla is on a distinguished road
thanks kartikkp, it will help me a lot.
sharensla is offline   Reply With Quote

Old   December 26, 2011, 06:30
Default wing analysis using gambit..
  #11
New Member
 
hemant sharma
Join Date: Dec 2011
Posts: 2
Rep Power: 0
hemant18 is on a distinguished road
hi to all....
i am doing the analysis of vortex generator on the aircraft wings......i am done with geometry in gambit but having problem in meshing,,,,i know how to mesh in 2d but dont know about 3d much .....is there some who can help me ....thanx
my email id- sharma18aug@gmail.com
hemant18 is offline   Reply With Quote

Old   January 5, 2012, 06:37
Smile
  #12
New Member
 
amir okhovat
Join Date: Sep 2011
Location: Iran- Isfahan
Posts: 19
Rep Power: 5
amirokhovat is on a distinguished road
Why you don't use ansys workbench?
In ansys Workbench you can import geometry from Catia, Solidworks ,... .
then you can mesh with many option in mesh generator. Ansys workbench is better than Gambit and each software like gambit that aren't user friendly.
amirokhovat is offline   Reply With Quote

Old   January 6, 2012, 04:19
Thumbs up
  #13
New Member
 
hemant sharma
Join Date: Dec 2011
Posts: 2
Rep Power: 0
hemant18 is on a distinguished road
really thanks for your suggestions....
but the problems is, i have to do it in CFD that is my project . if u can help me in CFD that would be really helpful.
thanks again amirokhovat !!
hemant18 is offline   Reply With Quote

Old   July 26, 2014, 05:12
Default
  #14
New Member
 
Mohamed Mehdi
Join Date: Dec 2009
Posts: 2
Rep Power: 0
Mehdi.numérique is on a distinguished road
I work on 3D airfoil in Gambit fluent but I have lot of problem on it, Can you help me please and send me your thesis at my Email : oueslati3@yahoo.fr, because the link don't work for me !!
Mehdi.numérique 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
3-D wing analysis problem arjit FLUENT 14 June 17, 2013 14:39
Wing analysis montazerhodjat CFX 8 August 3, 2012 08:55
3D Wing Analysis Ed FLUENT 4 August 3, 2012 05:57
3D wing analysis makaero FLUENT 0 October 1, 2009 19:19
Ansys/Flotran 3D Wing Analysis George Main CFD Forum 0 January 29, 2002 10:44


All times are GMT -4. The time now is 16:22.