Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
BOXES STRUCTURE CONSTRUCTION AROUND THE CLUSTERS OF VORTEX ELEMENTS TO REDUCE THE COMPUTATIONAL COST OF A LAGRANGIAN VORTEX METHOD WITH ROUGHNESS MODEL
Submission Author:
Crystianne Lilian Andrade , MG
Co-Authors:
Luiz Antonio Alcântara Pereira, Alex Bimbato
Presenter: Crystianne Lilian Andrade
doi://10.26678/ABCM.ENCIT2016.CIT2016-0042
Abstract
The aim of this paper is to present a numerical procedure that accelerates the second-order velocity structure function model calculation incorporated into the Lagrangian Vortex Method with turbulence modeling. In the present study, the local turbulence effects are considered during the vorticity diffusion process; as consequence a connection between the larger scales and the smaller ones is made by eddy viscosity. The eddy viscosity computation is necessary for each Lamb vortex element that constructs the Kármán vortex street; it is also the key to take into account the roughness effects. A boxes structure is used to identify clusters of vortex elements confined in different regions of the fluid domain. The boxes structure establishes interaction lists between vortex elements in a lower computational cost. The CPU time, necessary to compute the eddy viscosity is considerably reduced.
Keywords
two-dimensional roughness model, panel method, reduction of the computational cost, aerodynamics of bluff body, two-dimensional roughness model, panel method, reduction of the computational cost, aerodynamics of bluff body, two-dimensional roughness model, panel method, reduction of the computational cost, aerodynamics of bluff body, two-dimensional roughness model, panel method, reduction of the computational cost, aerodynamics of bluff body
