NDLI: Numerical Solutions of a Viscous Uniform Approach Flow Past Square and Diamond Cylinders

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Dalton, Charles Zheng, Wu
Copyright Year	2002
Abstract	Numerical results are presented for a uniform approach flow past square and diamond cylinders, with and without rounded corners, at Reynolds numbers of 250 and 1000. This unsteady viscous flow problem is formulated by the 2-D Navier-Stokes equations in vorticity and stream-function form on body-fitted coordinates and solved by a finite-difference method. Second-order Adams-Bashforth and central-difference schemes are used to discretize the vorticity transport equation while a third-order upwinding scheme is incorporated to represent the nonlinear convective terms. A grid generation technique is applied to provide an efficient mesh system for the flow. The elliptic partial differential equation for stream-function and vorticity in the transformed plane is solved by the multigrid iteration method. The Strouhal number and the average in-line force coefficients agree very well with the experimental and previous numerical values. The vortex structures and the evolution of vortex shedding are illustrated by vorticity contours. Rounding the corners of the square and diamond cylinders produced a noticeable decrease on the calculated drag and lift coefficients.
Sponsorship	Applied Mechanics Division
Starting Page	411
Ending Page	419
Page Count	9
File Format	PDF
ISBN	0791836592
DOI	10.1115/IMECE2002-32287
Volume Number	5th International Symposium on Fluid Structure Interaction, Aeroelasticity, and Flow Induced Vibration and Noise
Conference Proceedings	ASME 2002 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2002-11-17
Publisher Place	New Orleans, Louisiana, USA
Access Restriction	Subscribed
Subject Keyword	Vortex shedding Navier-stokes equations Partial differential equations Reynolds number Diamonds Drag (fluid dynamics) Flow (dynamics) Vortices Vorticity Corners (structural elements) Mesh generation Cylinders Finite difference methods Viscous flow
Content Type	Text
Resource Type	Article

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