Numerical Simulation Of Blood Flow And Vessel Wall Stresses In Stenosed Arteries
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Numerical Simulation Of Blood Flow And Vessel Wall Stresses In Stenosed Arteries
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Author : Li M. Mingxiu
language : en
Publisher:
Release Date : 2007
Numerical Simulation Of Blood Flow And Vessel Wall Stresses In Stenosed Arteries written by Li M. Mingxiu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Numerical Simulation Of Blood Flow And Vessel Wall Stresses In Stenosed Arteries
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Author : Mingxiu Li
language : en
Publisher:
Release Date : 2007
Numerical Simulation Of Blood Flow And Vessel Wall Stresses In Stenosed Arteries written by Mingxiu Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Numerical Simulation Of Blood Flow In The Stenotic Carotid Artery Bifurcation
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Author : Jennifer Sara Stroud
language : en
Publisher:
Release Date : 2000
Numerical Simulation Of Blood Flow In The Stenotic Carotid Artery Bifurcation written by Jennifer Sara Stroud and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Numerical Simulation Of Blood Flow In Arterial Stenosis Under Steady And Pulsatile Flow Conditions
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Author : Parth Pranavbhai Dave
language : en
Publisher:
Release Date : 2011
Numerical Simulation Of Blood Flow In Arterial Stenosis Under Steady And Pulsatile Flow Conditions written by Parth Pranavbhai Dave and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Electronic dissertations categories.
Cardiovascular diseases (CVDs) are among the leading causes of death in the world. In this study, an attempt was made to model the flow dynamics of blood in abnormally narrowed artery. Finite volume solver FLUENT was used for the analysis with the aim of understanding the consequences of increasing the degree of stenosis using a two-equation turbulence model. The compliant nature of the artery was neglected, and Newtonian behavior of the blood flow was assumed for the larger arteries. Steady-flow simulations with 75% area reductions were used to establish the validity of the current models by employing the standard and transitional variant of the k -w turbulence models. Subsequently, it was found that transitional k -w model was suitable for the low Reynolds number internal flows associated with the transition to turbulence, although only a minor departure in terms of the turbulence intensity peak was observed. Unsteady blood flow was introduced by employing a sinusoidal pulsatile waveform at the inlet. The pulsatile nature of the blood flow was investigated in the range of the constriction ratio from 60% to 90%, with an inlet-specified pulse. It was hypothesized that the severity of the stenosis played a major role in the initiation of the turbulence, since no major turbulence was reported for the 60% and 75% area reductions, while increasing the constriction ratio of 90% significantly altered the flow dynamics and triggered the transition to turbulence much earlier than anticipated. The outcome of current numerical efforts was expressed in terms of wall shear stress, a hemodynamically relevant parameter.
Numerical Simulation Of Blood Flow In Arteries
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Author : Thomas Fundi Rutaganira
language : en
Publisher:
Release Date : 1997
Numerical Simulation Of Blood Flow In Arteries written by Thomas Fundi Rutaganira and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Modeling And Numerical Simulation Of Fluid Structure Interaction In Circle Of Willis
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Author : Aria Alimi
language : en
Publisher: kassel university press GmbH
Release Date : 2019-01-01
Modeling And Numerical Simulation Of Fluid Structure Interaction In Circle Of Willis written by Aria Alimi and has been published by kassel university press GmbH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-01-01 with Technology & Engineering categories.
The main focus of this study is based on the numerical study of hemodynamics of blood and arterial wall behavior in Circle of Willis.
Cardiovascular Fluid Mechanics
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Author : Gianni Pedrizzetti
language : en
Publisher: Springer
Release Date : 2014-05-04
Cardiovascular Fluid Mechanics written by Gianni Pedrizzetti and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-04 with Technology & Engineering categories.
The book presents the state of the art in the interdisciplinary field of fluid mechanics applied to cardiovascular modelling. It is neither a monograph nor a collection of research papers, rather an extended review in the field. It is arranged in 4 scientific chapters each presenting thoroughly the approach of a leading research team; two additional chapters prepared by biomedical scientists present the topic by the applied perspective. A unique feature is a substantial (approx. one fourth of the book) medical introductory part, written by clinical researchers for scientific readers, that would require a large effort to be collected otherwise.
Biological Flow In Large Vessels
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Author : Valerie Deplano
language : en
Publisher: John Wiley & Sons
Release Date : 2022-06-01
Biological Flow In Large Vessels written by Valerie Deplano and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-06-01 with Science categories.
This book examines recent methods used for blood flow modeling and associated in vivo experiments, conducted using experimental data from medical imaging. Different strategies are proposed, from small-scale models to complex 3D modeling using modern computational codes. The geometries are wide-ranging and deal with the narrowing and widening of sections (stenoses, aneurysms), bifurcations, geometries associated with prosthetic elements, and even cases of vessels with smaller dimensions than those of the blood cells circulating in them. Biological Flow in Large Vessels provides answers to the question of how medical and biomechanical knowledge can be combined to address clinical problems. It offers guidance for further development of numerical models, as well as experimental protocols applied to clinical research, with tools that can be used in real-time and at the patient's bedside, for decision-making support, predicting the progression of pathologies, and planning personalized interventions.
A Comparative Study Between Newtonian And Non Newtonian Models In A Stenosis Of A Carotid Artery
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Author : Tejasvi Krishna Khambhampati
language : en
Publisher:
Release Date : 2014
A Comparative Study Between Newtonian And Non Newtonian Models In A Stenosis Of A Carotid Artery written by Tejasvi Krishna Khambhampati and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Blood, the most significant biological fluids plays a very vital role in the human mechanism, in terms of supplying the required nutrients to different parts of the human body, removing waste products and defending the body against infection through the action of antibodies. Therefore, it is imperative that blood flow must be studied in great detail. Hemodynamic analysis of blood flow in vascular beds and prosthetic devices requires the rheological behavior of blood to be characterized through appropriate constitutive equations relating the stress to deformation and rate of deformation. Numerical simulations, although not very accurate, provide an excellent alternative around this difficulty. As part of the preliminary studies, the Newtonian model of blood was assumed, and wall shear stresses have been plotted at certain critical points. Profiles of wall shear stress were then compared with the experimental results of Ku and Giddens. A numerical investigation of blood flow in stenosed carotid artery of the human body is presented in this thesis. Using a three-dimensional computational model of the stenosis, simulations were performed to capture the Non-Newtonian behavior of blood. The flow is considered as being pulsatile, with appropriate realistic boundary conditions. A shear thinning model (Carreau's) and a visco-elastic model (Yeleswarapu's Olydroyd-B model) have been employed to predict wall shear stress for the case of a healthy carotid artery and two cases of stenosed carotid artery models (50% and 90% stenosed carotid artery). From these simulation results, it was observed that wall shear stresses predicted by the models at certain critical points are different. Recirculation zones, flow separation and associated negative wall shear stress were observed in certain cases. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151909
Cfd Analysis Of Blood Flow Through Stenosed Arteries
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Author : Narmada Surigala
language : en
Publisher:
Release Date : 2015
Cfd Analysis Of Blood Flow Through Stenosed Arteries written by Narmada Surigala and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Femoral artery categories.
The pathological complications of atherosclerosis, namely heart disease and stroke, remain the leading cause of mortality in the world. Cardiovascular illness is highly prevalent among the American population. One manifesto of cardiovascular disease is Peripheral Artery Disease (PAD) which is caused by atherosclerosis in the arteries. Atherosclerosis is a vascular disease that reduces arterial lumen size through plaque deposition and arterial wall thickening. The flow patterns in the arteries are highly modulating along with the cardiac cycle and a strong function of the waveform created by the heartbeat. In this study, a computational simulation model is developed to analyze blood flow distribution in a femoral artery network based on Navier-Stokes equation. A comparative analysis of blood flow through femoral artery is done based on Newtonian and non-Newtonian blood flow by using Carreau-Yasuda model subjected to a waveform based on a cardiac cycle. The non-Newtonian CFD flow analysis model is use to analyze blood flow distributions in a femoral artery along with the adjacent capillary porous tissue medium. This simulation model is used to analyze the flow and stress field in a healthy and atherosclerosis affected femoral arteries. Velocity, pressure and Wall Shear Stress fields over cardiac cycle are analyzed to demonstrate that adverse flow field created upstream and downstream of the blockage that may cause enhanced growth in size of the blockage.