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A numerical study of the stability of helical vortices using vortex methods

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Walther, J. H. [Technical University of Denmark, DK-2800 Lyngby, Denmark] Chatelain, Philippe [UCL] Guénot, M. [Enginering College in Industrial Systems, 17041, La Rochelle, France] Machefaux, E. [Enginering College in Industrial Systems, 17041, La Rochelle, France] Okulov, V.L. [Technical University of Denmark, DK-2800 Lyngby, Denmark] Koumoutsakos, Petros [ETH Zurich, CH-8092, Switzerland]

We present large-scale parallel direct numerical simulations using particle vortex methods of the instability of the helical vortices. We study the instability of a single helical vortex and find good agreement with inviscid theory. We outline equilibrium configurations for three double helical vortices - similar to those produced by three blade wind turbines. The simulations confirm the stability of the inviscid model, but predict a breakdown of the vortical system due to viscosity.

Document type Communication à un colloque (Conference Paper) – Abstract, Présentation orale avec comité de sélection
Access type Accès restreint
Publication date 2007
Language Anglais
Journal information "Journal of Physic : Conference Series" - Vol. 75, no. 012034 (2007)
Peer reviewed yes
issn 1742-6588
e-issn 1742-6596
Publisher DTU-MEK
Publication status Publié
Affiliations Technical University of Denmark, DK-2800 Lyngby, Denmark - Department of Mechanical Engineering
UCL - FSA/MECA - Département de mécanique
Enginering College in Industrial Systems, 17041, La Rochelle, France - Industrial Systems
ETH Zurich, CH-8092, Switzerland - Computational Laboratory (CoLab)
Links
Bibliographic reference Walther, J. H. ; Chatelain, Philippe ; Guénot, M. ; Machefaux, E. ; Okulov, V.L. ; et. al. A numerical study of the stability of helical vortices using vortex methods.In: Journal of Physic : Conference Series, Vol. 75, no. 012034 (2007)
Permanent URL http://hdl.handle.net/2078.1/72347