پديد آورنده :
يوسفي قلعه رودخاني، مرتضي
عنوان :
بررسي الگوي جريان هوا و جذب ذرات در بخش درختي دستگاه تنفسي انسان
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
تبديل انرژي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
سيزده، 93، [II]ص.: مصور، جدول، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
استاد راهنما :
محمد سعيد سعيدي
استاد مشاور :
محسن دوازده امامي
توصيفگر ها :
قانون استوكس , مدل رابي، هور سفيد
تاريخ نمايه سازي :
5/3/87
استاد داور :
احمدرضا پيشه ور، احمد صداقت
تاريخ ورود اطلاعات :
1396/03/07
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتال
چكيده انگليسي :
ABSTRACTThe effect of flow structure on the particles transport and particles deposition pattern in a rigid smooth walledmodel of the human lung airways extending from trachea to the segmental bronchi is studied In this work based onthe Horsfield morphometrical data of human lung an out of plane model of three generation of human lung isproduced Particle deposition sites and efficiency studied for particles in the Stokes number range of 0 025 StkTrachea 0 102 at inspiratory flow rates of 30 lit min and 60 lit min measured at trachea A commerciallyavailable CFD cod is used for numerical simulation A lagrangian approach is employed and one way coupling isused between the continuum and dispersed phase which allows particle tracking to be run as a post processingcalculation The 3 D steady laminar flow is numerically simulated and then the particles trajectories are determinedby numerically solving the Newton law It is shown that the particle size has substantial influence on deposition regarding both efficiency and location Due to asymmetry of model and high velocity at the first generation ofhuman lung effective mechanism at particle deposition is impaction Therefore Stokes number can show theefficiency of impaction mechanism The result shows that with Stokes number increasing the deposition of particlesincrease Gravity and Saffman force are effective at high Stokes number and Brownian force due to high air velocityat the airways has not any affect on particle deposition Also it is noticed that for micron size particles depositionmainly occurs by inertial impaction at upper airways Deposition efficiency with parabolic velocity at the inlet isabout 50 more than realistic inlet condition The results show that particle deposition in Weibel model is less thanHorsfield model Also had been shown more fraction of particles enter the lower lobes of human lung
استاد راهنما :
محمد سعيد سعيدي
استاد مشاور :
محسن دوازده امامي
استاد داور :
احمدرضا پيشه ور، احمد صداقت
