Journal ArticleDOI
Flow through a converging-diverging tube and its implications in occlusive vascular disease — II: Theoretical and experimental results and their implications
TLDR
An experimental program to study the flow characteristics of an incompressible fluid through an axisymmetric converging-diverging tube is described, the theoretical and experimental results are compared, and some speculations are made on their implications in occlusive vascular disease.About:
This article is published in Journal of Biomechanics.The article was published on 1970-05-01. It has received 92 citations till now. The article focuses on the topics: Pressure drop & Reynolds number.read more
Citations
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Journal ArticleDOI
Direct Numerical Simulation of Laminar-Turbulent Transition in a Non-Axisymmetric Stenosis Model for Newtonian vs. Shear-Thinning Non-Newtonian Rheologies
TL;DR: In this paper, the experimental evidence of stabilizing effect of shear-thinning fluids was investigated numerically to investigate the effect of non-Newtonian Reynolds numbers on steady inflow through a non-axisymmetric stenotic model.
Journal ArticleDOI
Influence of magnetic field and heat transfer on two-phase fluid model for oscillatory blood flow in an arterial stenosis
R. Ponalagusamy,R. Tamil Selvi +1 more
Abstract: The unsteady two-fluid blood flow model in an artery with mild stenosis is considered by taking into account of effects of both heat transfer and magnetic field. Such a combination has not been reported in the literature of blood flow. The effects of plasma layer thickness, magnetic field, radiation parameter, thermal conductivity and viscosity ratio on flow variables are discussed and depicted graphically. The phase lag between pressure gradient and flow variables has been predicted and the effects of magnetic and radiation parameters, thermal conductivity, plasma layer thickness and Grashof number on the phase lag are brought out which form new information that are, for the first time, added to the literature. It has been pointed out here that the temperature and shear stress (or wall shear stress) decrease with increasing of plasma layer thickness. The flow resistance decreases with the increase in Grashof number and plasma layer thickness. Hence, the existence of the peripheral plasma layer and the pivotal role of Grashof number could be useful for the functions of the diseased arterial system and hence it is concluded that the present study is believed to yield some good improvement over two-fluid models discussed in the literature.
Journal ArticleDOI
Effect of constriction height on flow separation in a two-dimensional channel
G. C. Layek,C. Midya +1 more
TL;DR: In this paper, the effect of the constriction height on viscous flow separation past a two-dimensional channel with locally symmetric constrictions was studied numerically, and a numerically stable scheme in primitive variables (velocity and pressure) for the solution of time-dependent Navier-Stokes equations was employed using finite-difference approximation in staggered grid.
Journal Article
Thixotropy of Blood and Proneness to Thrombus Formation
TL;DR: The viscosity and thixotropy of human blood in the absence of anticoagulants was carried out by means of a rotational cone-in-cone viscometer and it is suggested that it may be also related to the proneness of thrombus formation.
Journal ArticleDOI
Coronary Flow Velocity and Disturbed Flow Predict Adverse Clinical Outcome After Coronary Angioplasty
Scott Kinlay,Jasmine Grewal,Deborah Manuelin,James C. Fang,Andrew P. Selwyn,John A. Bittl,Peter Ganz +6 more
TL;DR: High Reynolds numbers, indicating disturbed blood flow after coronary angioplasty, increase the risk of adverse clinical events, potentially through shear-stress–related molecular mechanisms that promote restenosis and atherogenesis.
References
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Journal ArticleDOI
Acute Vascular Endothelial Changes Associated with Increased Blood Velocity Gradients
TL;DR: The purpose of this study is to quantify the acute changes in endothelial histology that are associated with an induced increase in blood velocity and to establish the “normal” endothelial cell population density as a function of stress exposure.
Book
Slow viscous flow
TL;DR: The second edition of this book as mentioned in this paper is the most complete and complete version of the first edition of the paper, with a much richer coverage of theoretical hydrodynamics, including the second principle of thermodynamics, the Boussinesq approximation, time dependent flows, Marangoni convection, Kovasznay flow, plane periodic solutions, Hele-Shaw cells, Stokeslets, rotlets, finite element methods, Wannier flow, corner eddies, and analysis of the Stokes operator.
Related Papers (5)
Flow through a converging-diverging tube and its implications in occlusive vascular disease — I
Flow characteristics in models of arterial stenoses. II. Unsteady flow.
Donald F. Young,Frank Y. Tsai +1 more