Cfd Analysis Of Blood Flow Through Stenosed Arteries
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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.
Cfd Analysis Of Coronary Artery Blood Flow From Stenting And Various Levels Of Stenosis
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Author : Luke Matthew Chapdelaine
language : en
Publisher:
Release Date : 2020
Cfd Analysis Of Coronary Artery Blood Flow From Stenting And Various Levels Of Stenosis written by Luke Matthew Chapdelaine and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
A Computational Fluid Dynamic Study Of Blood Flow Through Stenosed Arteries
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Author : Keng Cheng Ang
language : en
Publisher:
Release Date : 1996
A Computational Fluid Dynamic Study Of Blood Flow Through Stenosed Arteries written by Keng Cheng Ang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Effects of stenoses on characteristics such as pressure drops, flow velocities and shearing stresses on the arterial walls are examined and their significance on the progression of arterial diseases is discussed.
Blood Flow Analysis Through A Bell Shaped Stenosed Artery
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Author : Rupesh Kumar Srivastav
language : en
Publisher:
Release Date : 2017-04-19
Blood Flow Analysis Through A Bell Shaped Stenosed Artery written by Rupesh Kumar Srivastav and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-04-19 with categories.
Comparison Of Cfd And Fsi Simulations Of Blood Flow In Stenotic Coronary Arteries
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Author : Violeta Carvalho
language : en
Publisher:
Release Date : 2020
Comparison Of Cfd And Fsi Simulations Of Blood Flow In Stenotic Coronary Arteries written by Violeta Carvalho and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Computers categories.
Cardiovascular diseases are amongst the main causes of death worldwide, and the main underlying pathological process is atherosclerosis. Over the years, fatty materials are accumulated in the arterial which consequently hinders the blood flow. Due to the great mortality rate of this disease, hemodynamic studies within stenotic arteries have been of great clinical interest, and computational methods have played an important role. Commonly, computational fluid dynamics methods, where only the blood flow behavior is considered, however, the study of both blood and artery walls,Äô interaction is of foremost importance. In this regard, in the present study, both computational fluid dynamics and fluid-structure interaction modeling analysis were performed in order to evaluate if the arterial wall compliance affects considerably the hemodynamic results obtained in idealized stenotic coronary models. From the overall results, it was observed that the influence of wall compliance was noteworthy on wall shear stress distribution, but its effect on the time-averaged wall shear stress and on the oscillatory shear index was minor.
Numerical Analysis Of Blood Flow And Wall Mechanics In Stenosed Arteries
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Author : Ka Wai Lee
language : en
Publisher:
Release Date : 2003
Numerical Analysis Of Blood Flow And Wall Mechanics In Stenosed Arteries written by Ka Wai Lee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Simulation Of Pulsatile Blood Flow Through Arterial Stenosis
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Author : Khairuzzaman Mamun
language : en
Publisher:
Release Date : 2016-08-26
Simulation Of Pulsatile Blood Flow Through Arterial Stenosis written by Khairuzzaman Mamun and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-26 with categories.
Blood Flow Analysis Through Blocked Artery
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Author : Shamoon Jamshed
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2010-02
Blood Flow Analysis Through Blocked Artery written by Shamoon Jamshed and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-02 with categories.
In this study, different turbulence models like k-epsilon and k-omega SST model are tested by comparing them against experimental data given by Deshpande and Giddens 1976. The stenosed geometry of 75 % area reduction is used for comparison. CFD code FLUENT 6.2 is used to solve the flow equations and a steady state flow with 2D axi-symmetric geometry is considered with Reynolds number of 5000. For lamnar flow in CCA, Reynolds numbers 50, 100 and 200 were used and the results were compared with the experimental data as given by Ahmed Giddens and Mabon. The results for laminar study were also obtained by varying the degree of occlusion i.e. 75 %, 56 % and two geometries with 89% area reduction. The models were named as M0, M1, M2 and M3. In the study, we found that model M3 is highly severe stenosis and a medical scanned image approximating this kind of geometry must be seriously examined.
A Study Of Non Newtonian Behaviour Of Blood Flow Through Stenosed Arteries
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Author : Brandon Pincombe
language : en
Publisher:
Release Date : 1999
A Study Of Non Newtonian Behaviour Of Blood Flow Through Stenosed Arteries written by Brandon Pincombe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Arteries 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.