Paper Information

Journal:   MODARES TECHNICAL AND ENGINEERING   Summer 2003 , Volume - , Number 12; Page(s) 17 To 26.
 
Paper: 

NUMERICAL SIMULATION OF TURBULENT FLOW AROUND A CIRCULAR CYLINDER USING RANDOM VORTEX METHOD

 
 
Author(s):  PORMAHMOOD N., GHADIRI B.*, NOURAZAR S.S.
 
* Department of Mechanical Engineering ,Tarbiat Modarres University
 
Abstract: 

In this paper the turbulent, incompressible and unsteady viscous flow around a circular cylinder is numerically simulated and the imposed fluid forces are calculated. The Random Vortex Method (RVM) with the using of a Large-Eddy Simulation (LES), as a turbulence modelling, is developed to investigate the fluid flow around a circular cylinder. A LES of turbulent flow is applied to account for the effect of turbulence in the wake. The Navier-Stokes equations are filtered by LES and transformed to computational domain by a general conformal transformation. The fil- tered equations are solved by an operator splitting where the velocity is found from Cloud-in-Cell (CIC) method and the diffusion equation is modeled by random walks (RW). The numerical results lift, darg coefficients and Strouhal number are in reasonable agreement with experimental results.

 
Keyword(s): LARGE EDDY SIMULATION, RANDOM VORTEX METHOD, TURBULENT FLOW
 
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