3D flow past a wing

ajr93 · March 6, 2014, 09:55

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 · March 7, 2014, 12:16

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?

dreamz · March 30, 2014, 01:00

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.

March 6, 2014, 09:55	3D flow past a wing	#1
ajr93 New Member Alistair Join Date: Mar 2014 Posts: 5 Rep Power: 12	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

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

March 7, 2014, 12:16		#2
ajr93 New Member Alistair Join Date: Mar 2014 Posts: 5 Rep Power: 12	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?

March 30, 2014, 01:00		#3
dreamz Member Ashutosh Join Date: Jul 2013 Posts: 98 Rep Power: 13	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.