پديد آورنده :
قديري مدرس، فاطمه
عنوان :
مدل سازي جريان هاي متلاطم با سطح مشترك
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مهندسي مكانيك
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
[نه]، 151، [II] ص.: مصور، جدول، نمودار
استاد راهنما :
ابراهيم شيراني
استاد مشاور :
احمد رضا پيشه ور اصفهاني
توصيفگر ها :
شبيه سازي اغتشاشي , روش هاي دنبال كننده سطح ، تسخير كننده سطح , مومئتوم و پيوستگي , چگالي يكسان ، متفاوت
استاد داور :
محمود اشرفي زاده، محمد سعيد سعيدي
تاريخ ورود اطلاعات :
1396/10/27
چكيده فارسي :
به فارسي و انگليسي : قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
AbstractThe main goal of this thesis is to model turbulent effects near interface in interfacialturbulent flows based on VOF method RANS equations to solve momentum equationsand an anisotropic two equation model to circumvent the closure problem are used VOFmethod is modified to involve turbulent effects on volume fraction equation Allmodifications and new models are implemented in SURFER code Results insist of threemain parts In the first part two sub models for turbulent term of averaged volume fractiontransport equation is presented to overcome the closure problem The first model modeledthe term as intermittent flow models Kelvin Helmholtz instability for different conditionof velocity and density is simulated analyzed and discussed Attention is focused on theinterface shape turbulence distribution and quality of ligaments breakup Second model models the term using a Bosinessque like approximation The main idea of this model isdecompose the diffusion generated by Bosinessque like approximation into twocomponents normal to the interface and a tangential one Like the first model KelvinHelmholtz instability is simulated and the effects of considering and omitting normal andtangential components on the interface shape and breakup are studied In order to validatethe models a plane jet is simulated by the code and the results are compared withexperimental data In second part a new sub model for surface tension term in RANSequation for interfacial flow is presented The turbulent kinetic energy and the rate of itsdissipation equations are derived to consider fluctuations of surface tension and unknownterms are modeled Finally in third part of this thesis for better modeling and accordancewith experimental data a new transport equation for turbulent term in the averaged volumefraction transport equation is derived
استاد راهنما :
ابراهيم شيراني
استاد مشاور :
احمد رضا پيشه ور اصفهاني
استاد داور :
محمود اشرفي زاده، محمد سعيد سعيدي
