每年出版 4 期
ISSN 打印: 1065-3090
ISSN 在线: 1940-4336
Indexed in
DETERMINATION OF THE THRESHOLD VALUE OF THE QUANTITY CHOSEN FOR VORTEX REPRESENTATION IN TURBULENT FLOW
摘要
In recent times much work has been devoted to the issue of vortex definition in turbulence. Several criteria for vortex identification have been devised and techniques for defining the correspondence between different criteria have been found, leading to the possibility of representing nearly-equally intense vortical structures using different identification methods. The issue remains open of calculating a threshold value of the quantity chosen for vortex eduction, being able to give a physically based representation of the vortical structure at hand. For this purpose we present a direct method based on some statistics of the velocity field, applied in particular to the issue of representing a hairpin vortex in the wall region of turbulent channel flow.
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Alfonsi Giancarlo, On Direct Numerical Simulation of Turbulent Flows, Applied Mechanics Reviews, 64, 2, 2011. Crossref
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Alfonsi Giancarlo, Lauria Agostino, Primavera Leonardo, The Field of Flow Structures Generated by a Wave of Viscous Fluid Around Vertical Circular Cylinder Piercing the Free Surface, Procedia Engineering, 116, 2015. Crossref
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Alfonsi Giancarlo, Ciliberti Stefania, Mancini Marco, Primavera Leonardo, Direct Numerical Simulation of Turbulent Channel Flow on High-Performance GPU Computing System, Computation, 4, 1, 2016. Crossref
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Alfonsi Giancarlo, Numerical Simulations of Wave-Induced Flow Fields around Large-Diameter Surface-Piercing Vertical Circular Cylinder, Computation, 3, 3, 2015. Crossref
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Alfonsi Giancarlo, Lauria Agostino, Primavera Leonardo, Recent Results from Analysis of Flow Structures and Energy Modes Induced by Viscous Wave around a Surface-Piercing Cylinder, Mathematical Problems in Engineering, 2017, 2017. Crossref