Numerical Calculation for the Steady Laminar Flow Past a Circular Cylinder PDF Download
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Author: Marvin Edward McDonald
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
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Author: Marvin Edward McDonald
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
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Author: John Scott Newman
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
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Author: Frans T. M. Nieuwstadt
Publisher:
ISBN:
Category :
Languages : en
Pages : 206
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Author: Hamid Jafroudi
Publisher:
ISBN:
Category : Laminar flow
Languages : en
Pages : 440
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Book Description
Author: Patrick Beaudan
Publisher:
ISBN:
Category : Cylinders
Languages : en
Pages : 280
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Author: Emily Buckman Clark
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
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Book Description
Two-dimensional laminar flow over a circular cylinder was investigated in this work. Three cases were considered in which the cylinder was either stationary, in constant rotation, or in periodic rotation. The purpose of this work was to investigate the effects of a rotating cylinder for lift enhancement, drag reduction, and the suppression of vortex shedding. The governing coupled nonlinear Navier-Stokes equations were solved using a finite difference discretization and Newton's method. In this way, three flow solvers were developed for this research: a steady solver, an unsteady time-accurate solver, and an unsteady harmonic balance solver. The force coefficients were of prime interest in this study. Favorable results were obtained using rotation as an active control for the flow over the cylinder. The cylinder in constant rotation resulted in lift enhancement, drag reduction and vortex suppression for increasing rotational speeds. Lift enhancement and drag reduction were also noted for a rotationally oscillating cylinder. The trade-offs for these goals were discussed. Lastly, a finite difference sensitivity analysis was performed for a rotationally oscillating cylinder with the harmonic balance solver. The mean drag coefficient was taken as the objective function, and the Strouhal number was the investigated design variable. The goal was to use the sensitivity analysis to determine a forcing frequency, which minimized the mean drag coefficient. Two iterative techniques were investigated, but neither converged to a minimum drag coefficient with the harmonic balance solver. It was determined that a minimum drag coefficient occurs near the boundary between the lock-on and non lock-on regions or in the non lock-on region, where the harmonic balance solver does not converge.
Author: Jorgen Fredsoe
Publisher: World Scientific
ISBN: 981449805X
Category :
Languages : en
Pages : 550
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This book discusses the subject of wave/current flow around a cylinder, the forces induced on the cylinder by the flow, and the vibration pattern of slender structures in a marine environment.The primary aim of the book is to describe the flow pattern and the resulting load which develops when waves or current meet a cylinder. Attention is paid to the special case of a circular cylinder. The development in the forces is related to the various flow patterns and is discussed in detail. Regular as well as irregular waves are considered, and special cases like wall proximities (pipelines) are also investigated.The book is intended for MSc students with some experience in basic fluid mechanics and for PhD students.
Author: Srinivasan Gopalkrishnan
Publisher:
ISBN:
Category : Cylinders
Languages : en
Pages : 130
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Author: Helmut Eckelmann
Publisher: Springer
ISBN: 9783662004159
Category : Science
Languages : en
Pages : 364
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Book Description
Bluff-body wakes play an important role in many fluid dynamics problems and engineering applications. This book gives and up-to-date account of recent results obtained in the study of bluff-body wakes. Experimental, theoretical and numerical approaches are all comprehensively covered and compared. Topics of particular interest include hydrodynamic instability analyses, three-dimensional pattern formation problems, flow control methods, bifurcation analyses, numerical simulations and turbulence modelling. The main originality of thisvolume is that recent conceptual advances made to describe nonlinear phenomena in general are put to the test on a classical problem in fundamental fluid mechanics, namely the wake structure generated behind a bluff object.
Author: Mark Louis Schrader
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 444
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Book Description
