Particle Image Velocimetry and Finite Volume Method Study of Bi-leaflet Artificial Heart Valve
- سال انتشار: 1397
- محل انتشار: دوماهنامه مکانیک سیالات کاربردی، دوره: 11، شماره: 5
- کد COI اختصاصی: JR_JAFM-11-5_021
- زبان مقاله: انگلیسی
- تعداد مشاهده: 278
نویسندگان
School of Mechanical Engineering, Universiti Sains Malaysia, Engineering Campus, ۱۴۳۰۰ Nibong Tebal, Penang, Malaysia
School of Mechanical Engineering, Universiti Sains Malaysia, Engineering Campus, ۱۴۳۰۰ Nibong Tebal, Penang, Malaysia
School of Mechanical Engineering, Universiti Sains Malaysia, Engineering Campus, ۱۴۳۰۰ Nibong Tebal, Penang, Malaysia
School of Aerospace Engineering, Universiti Sains Malaysia, Engineering Campus, ۱۴۳۰۰ Nibong Tebal, Penang, Malaysia
Mechanical Sect. Universiti Kuala Lumpur Malaysia Spanish Institute, Kulim Hi-Tech Park, ۰۹۰۰۰ Kulim, Kedah
چکیده
The key feature of the bi-leaflet valve is the geometry of the two leaflets, which can be crucial in determining the flow field. In this paper, observations were made on the flow pattern of the blood through the use of bi-leaflet type mechanical prosthetic valve (MHV). Finite volume method (FVM) analysis was conducted using fluid-structure interaction (FSI) method that solved on a dynamic mesh. In terms of the validation, particle image velocimetry (PIV) was used to verify the findings obtained from FVM analysis. The results of velocity and vorticity were the main parameters to be compared. Based on the findings, the results computed for the leaflets motion and the flow field using FVM was found to be in agreement with PIV experimental data. The pressure obtained for the simulation is in the range of ۱۰,۶۶۶ – ۱۶,۰۰۰ Pa, which is an ideal and healthy blood pressure level of human. The vorticity was observed to be formed behind the valve with DVI value of ۱.۲۷۵ (simulation) and ۱.۴۵۷ (experiment), lower than the expected range for a normal DVI in mitral valve. The maximum shear stress achieved (۲۲.۵۴۸۱ Pa) is in the range of platelets activation, which could lead to thrombus formation. The maximum Von Mises stress was found to be at the hinge region of the bi-leaflet valve. These results will serve as a basis for valve design to improve the hemodynamic properties of the heart valve.کلیدواژه ها
Mechanical heart valve, Particle image velocimetry, structure interaction, Dynamic mesh, Fluidاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.