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

3D flow past a wing

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 6, 2014, 09:55
Default 3D flow past a wing
  #1
New Member
 
Alistair
Join Date: Mar 2014
Posts: 5
Rep Power: 12
ajr93 is on a distinguished road
Hi all,
As part of a project at uni I am investigating the effect of winglets on aircraft drag reduction. To do this I am modelling a wing, both with and without winglets, and simulating the flow in Fluent.
I have imported a solid model of the wing in to Ansys Workbench and have the geometry laid out ready to be meshed. I have put a box enclosure around the wing and I was just wondering if anyone could give me any hints on how to increase the mesh density in regions close to the wing, particularly around the wing tips. The mesh density will ideally decrease in regions further away from the wing. I am new to Ansys and have ran a simulation in 2D but have never worked in 3D before.
Many Thanks
Alistair
ajr93 is offline   Reply With Quote

Old   March 7, 2014, 12:16
Default
  #2
New Member
 
Alistair
Join Date: Mar 2014
Posts: 5
Rep Power: 12
ajr93 is on a distinguished road
Any suggestions anyone? I've tried doing projections on all the faces of the enclosure and created new planes on the wing tips and made projections on there in order to map face mesh it later on. However when I make surfaces for the projections Ansys doesn't like it when they intersect. It's also incredibly long winded. Surely there is a better way of doing it?
ajr93 is offline   Reply With Quote

Old   March 30, 2014, 01:00
Default
  #3
Member
 
Ashutosh
Join Date: Jul 2013
Posts: 98
Rep Power: 12
dreamz is on a distinguished road
You can try to put inflation in ansys meshing. It will create a denser mesh around the wings which will help you capture the boundary layer effects. For inflation select the domain as your body and the surfaces of the wing as the boundary.
Caution: Keep an eye upon the max skewness when you put inflation. In any case it must not exceed 0.98.

Another option is to adapt the region around the wings in fluent. This option is available in the adapt menu in fluent. This is safer, as till now I have not found problems with skewness when I have used this method.
dreamz is offline   Reply With Quote

Reply

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
Review: Reversed flow CRT FLUENT 1 May 7, 2018 06:36
flow over a cylinder urgent! kevin FLUENT 8 August 11, 2015 14:00
FLUENT LES Simulation of flow past a cube NGH FLUENT 6 November 14, 2012 00:45
Flow past orifice aurel Main CFD Forum 0 January 27, 2009 07:46
Unsteady simulation of flow past wheel Tom FLUENT 8 January 18, 2006 11:54


All times are GMT -4. The time now is 05:28.