پديد آورنده :
فضائلي، بهادر
عنوان :
بررسي پارامتريك جريان خون ضرباندار در شريان كرونري داراي گرفتگي هاي متوالي
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
شانزده،110ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محسن ثقفيان
استاد مشاور :
محمودرضا صادقي
توصيفگر ها :
تنش برشي ديوار , جدايي جريان , شاخص تنش برشي
تاريخ نمايه سازي :
27/11/92
استاد داور :
محمدرضا سليم پور، احمد صداقت
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Parametric Investigation Of Pulsatile Blood Flow In Coronary Artery With Concurrent Multiple Stenoses Bahador Fazaeli bahadorfazaeli@yahoo com Department of Mechanical engineering Isfahan University of Technology Isfahan Iran Degree M sc Language Farsi Supervisor Dr Mohsen Saghafian saghafian@cc iut ac ir Abstract Arterial stenosis is a common disease and major cause of death in developed countries Because of the important role of hemodynamic factors in the formation and progression of the stenosis modeling of blood behavior has been studied by researchers for many years In the present study blood is simulated as both steady state and pulsatile laminar in a common carotid artery with an axisymmetric stenosis assuming rigid and impermeable walls Governing equations continuity and momentum have been solved by finite element method Newtonian and six non Newtonian models are used to describe blood behavior Hematocrit is applied in modified Casson and Walburn Schneck models Hemodynamic parameters such as radial velocity wall shear stress global importance factor separation and reattachment points have been calculated According to obtained results separation zone is the longest for Newtonian model and is more affected under changes like Reynolds number and stenosis severity At lower velocities global importance factors show more values and differences between models are more considerable Basic difference between steady and pulsatile condition is for the recirculation zone length and global importance factors because blood flow can not adjust itself with velocity fluctuations at the inlet in pulsatile state At low shear rates power law model is not appropriate Generalized power law and Carreau Yasuda models show very similar behavior at most shear rates Non Newtonian effects become more significant by increasing hematocrit The results have convenient agreement with previous works Symmetrical stenosis in coronary artery with a semi permeable wall under unsteady ows for Newtonian non ally The results show that the unsteadiness of blood PDF created with pdfFactory trial version www pdffactory com
استاد راهنما :
محسن ثقفيان
استاد مشاور :
محمودرضا صادقي
استاد داور :
محمدرضا سليم پور، احمد صداقت
