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Computer simulation of blood flow in large arteries by a finite element method
العناوين الأخرى
محاكاة بالحاسوب لجريان الدم في الشرايين الكبيرة باستخدام طريقة العناصر المحددة
مقدم أطروحة جامعية
مشرف أطروحة جامعية
Ubayd, Talib Abd al-Samad
Khami, Muhammad Jawar
الجامعة
جامعة البصرة
الكلية
كلية العلوم
القسم الأكاديمي
قسم علوم الحاسبات
دولة الجامعة
العراق
الدرجة العلمية
ماجستير
تاريخ الدرجة العلمية
2013
الملخص الإنجليزي
In this thesis, two-dimensional numerical simulations of blood flow are performed using finite element method, discretization in space on unstructured mesh.
This simulation is carry out to investigate the influence of abnormal effects of artery geometry on the behavior of steady and laminar flow of an incompressible and Newtonian blood within a stenosed 2D vessels (humane large arteries) with both symmetric and non-symmetric stenotic in different models, and also on the behavior of blood flow in arterial fusiform aneurysm.
Navier-stokes equation is applied to describe the flows in the arteries in this study.
The fully developed inlet flow and constant viscosity and density are imposed on the domain.
The Galerkin Finite Element Method has been employed to solve the governing equations.
No-slip boundary conditions are considered at the artery walls.
Very large sets of simultaneous algebraic equations have to be solved, and this can only be done economically with the aid of digital computers.
Newton method iterations are used for solving the nonlinear system.
In this work, the Blood Flow Simulation program (BFS) to simulate blood flow by finite element method is written in Matlab.
The BFS program have simple graphical user interface, it is easy to use and it has fully control for saving and visualization the results data This thesis provides a comprehensive understanding of the spatial fluid dynamics involved in arterial flows with stenosis or with dilatation.
Simulations of this unnatural flow can give researchers information on how blood is distributed through the infected vessels.
Also, this can help researchers in the field with designing specific treatments that will improve patient care.
The results are characterizing the geometric effects on the blood flow under steady condition, and illustrate the key physiological parameters including the pressure drop and wall stress through the flow in the arteries.
The stenoses severity intensifies the stretches the recirculation zones in the arterial flow.
The shear stress, pressure and velocity vary most intensively in and after the stenotic region.
Shear stresses were estimated from velocity gradient, and the nature of observed poststenotic flow is discussed.
With regard to stenotic vessel, results are presented for velocity, pressure and shear stress measurements for steady flow through 25, 50 and 75% stenoses at different values of Reynolds numbers.
In the aneurysm model the maximum diameter D= 32mm, the parental artery diameter d= 13mm and the length of the aneurysm L= 45 mm at Reynolds number from 10 to 600.
Velocity, pressure and wall shear stress fields are visualized for a better interpreting and understanding of flow features The computation result for the aneurismal artery was compared with other previous experimental results and gets a good agreement.
Also the present results for the stenosis model compared with experimental measurements and computational data obtained by previous studies.
التخصصات الرئيسية
تكنولوجيا المعلومات وعلم الحاسوب
عدد الصفحات
113
قائمة المحتويات
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction.
Chapter Two : Fluid and blood flow description.
Chapter Three : Finite element method.
Chapter Four : Numerical simulations for blood flow in large arterys.
Chapter Five : Conclusions and recommendations for future work.
References.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Sadiq, Hasanayn Abd al-Amir. (2013). Computer simulation of blood flow in large arteries by a finite element method. (Master's theses Theses and Dissertations Master). University of Basrah, Iraq
https://search.emarefa.net/detail/BIM-743821
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Sadiq, Hasanayn Abd al-Amir. Computer simulation of blood flow in large arteries by a finite element method. (Master's theses Theses and Dissertations Master). University of Basrah. (2013).
https://search.emarefa.net/detail/BIM-743821
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Sadiq, Hasanayn Abd al-Amir. (2013). Computer simulation of blood flow in large arteries by a finite element method. (Master's theses Theses and Dissertations Master). University of Basrah, Iraq
https://search.emarefa.net/detail/BIM-743821
لغة النص
الإنجليزية
نوع البيانات
رسائل جامعية
رقم السجل
BIM-743821
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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