|
[Sponsors] |
August 12, 2015, 06:01 |
Lifting Surface Model
|
#1 |
New Member
Join Date: Aug 2015
Posts: 10
Rep Power: 11 |
Hey Guys,
I am trying Vortex lattice method using Vortex rings of a NACA0012 rectangular wing and I am getting the profile for both circulation and wake. But when I change the number of panels, the profile shape is same but the values are changing. That is, if I increase the panel count, the peak circulation/wake vortex strength is decreasing by 30-40%. Could you please tell me why there is a change in value with panel density and Is there any fix for this [at least, to minimise the change] ?? Also, This model does not include thickness effect and is there any solution to include it as well ??? A good tutorial will be helpful. Thanks in advance !!! |
|
August 12, 2015, 16:30 |
|
#2 |
Senior Member
adrin
Join Date: Mar 2009
Posts: 115
Rep Power: 17 |
I don't know the details, but it appears to me that what you're experiencing is nothing more than the effect of grid resolution. Just as with any other numerical method, as you increase the grid resolution (the number of vortex lattices in your case) the solution should (hopefully) converge. You might have had a very low resolution the first time around. Try using even more lattices and check the trend of your peak circulation, etc. Just keep in mind that the vortex lattice method is low-order, so it may require higher-than-normal resolution for the solution to converge.
Adrin |
|
Tags |
aerodynamic, lifting surface model, panel method, vortex lattice |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[Gmsh] Error : Self intersecting surface mesh, computing intersections & Error : Impossible | velan | OpenFOAM Meshing & Mesh Conversion | 3 | October 22, 2015 11:05 |
Superlinear speedup in OpenFOAM 13 | msrinath80 | OpenFOAM Running, Solving & CFD | 18 | March 3, 2015 05:36 |
Internal CFD on a surface model (SW2010) | sw1990 | Main CFD Forum | 7 | January 4, 2011 19:36 |
[Gmsh] boundaries with gmshToFoam | ouafa | OpenFOAM Meshing & Mesh Conversion | 7 | May 21, 2010 12:43 |
lifting surface vs. CFD | Rodrigo Madariaga | FLUENT | 0 | March 25, 2002 23:08 |