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The Diffused Vortex Hydrodynamics Method

Published online by Cambridge University Press:  30 July 2015

Emanuele Rossi ,
Andrea Colagrossi ,
Benjamin Bouscasse  and
Giorgio Graziani
Emanuele Rossi
Affiliation:
Department of Mathematics, University of Rome, Sapienza, Rome, 00185, Italy
Andrea Colagrossi*
Affiliation:
CNR-INSEAN, Marine Technology Research Institute, Rome, 00128, Italy
Benjamin Bouscasse
Affiliation:
CNR-INSEAN, Marine Technology Research Institute, Rome, 00128, Italy
Giorgio Graziani
Affiliation:
Department of Aerospace and Mechanical Engineering, University of Rome, Sapienza, Rome, 00185, Italy
*
*Corresponding author. Email addresses: e-rossi@mat.uniroma1.it (E. Rossi), andrea.colagrossi@cnr.it (A. Colagrossi), benjamin.bouscasse@cnr.it (B. Bouscasse), g.graziani@uniroma1.it (G. Graziani)

Abstract

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A new Particle Vortex Method, called Diffused Vortex Hydrodynamics (DVH), is presented in this paper. The DVH is a meshless method characterized by the use of a regular distribution of points close to a solid surface to perform the vorticity diffusion process in the boundary layer regions. This redistribution avoids excessive clustering or rarefaction of the vortex particles providing robustness and high accuracy to the method. The generation of the regular distribution of points is performed through a packing algorithm which is embedded in the solver. The packing algorithm collocates points regularly around body of arbitrary shape allowing an exact enforcement on the solid surfaces of the no-slip boundary condition. The present method is tested and validated on different problems of increasing complexities up to flows with Reynolds number equal to 100,000 (without using any subgrid-scale turbulence model).

Keywords

Vorticity dynamicsvortex methodparticle methodsmeshless methodsmeshfree methodspacking algorithmdiffused vortex hydrodynamicsbody fitted methodvortex wake

Information

Type
Research Article
Information
Communications in Computational Physics , Volume 18 , Issue 2 , August 2015 , pp. 351 - 379
Copyright
Copyright © Global-Science Press 2015 

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