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Dissipation of vortices in CFD‐simulations
Author(s) -
Krieger Michael,
Wimmer Peter
Publication year - 2003
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200310444
Subject(s) - vortex , inviscid flow , computational fluid dynamics , wingtip vortices , trailing edge , mechanics , wing , dissipation , horseshoe vortex , computer simulation , physics , numerical analysis , classical mechanics , aerospace engineering , vortex ring , mathematics , engineering , mathematical analysis , thermodynamics
The aim of this investigation is to find out the crucial factors for the meshing of a wing and especially the area behind the wingtip with the intention to keep numerical vortex‐dissipation low to be able to analyse the trailing edge vortices of the wing in inviscid CFD‐simulations. In a series of basic test‐simulations spatial vortex propagation is observed for different cell types, mesh sizes and vorticities. A numerical viscosity is determined by comparing numerical results with an analytical solution for vortex‐decay. The information gained is applied to a numerical analysis of a trailing edge vortex of a rectangular wing. The results of the numerical calculations are compared to PIV‐measurements of trailing edge vortices and analytic results of linear wing theory.