5537

5197

كارشناسي ارشد

مهندسي مكانيك

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1389

دوازده،126ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

محسن دوازده امامي، محمد سعيد سعيدي

29/8/89

احمدرضا پيشه ور، محمدرضا سليم پور

مهندسي مكانيك

ID5197

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Particle Tracking on Unstructured Grids Hadi Safaei h safayei@me iut ac ir Date of Submission 2010 04 28 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Mohsen Davazdahemami Mohsen@cc iut ac ir Supervisor Mohammad Said Saidi Mssaidi@sharif edu Abstract Diverse applications of two phase flows have attracted many researchers to the modeling and simulation of these flows The goal of this research is to investigate and to simulate particle dynamics in an isothermal flow by means of the Hybrid Eulerian Lagrangian In multiphase flows it is necessary to examine each phase individually and to consider the inter phase transport Therefore in the framework of the Eulerian Lagrangian scheme the continuous phase is studied from an Eulerian viewpoint using Fluent software for its numerical simulations whereas a Lagrangian viewpoint is used for simulation of disperse phase The particle equations are complex and their analytical solutions are not possible for practical cases Therefore the Rk4 integration method is used to solve the particle equations The most important part of the numerical simulation of the particle phase is the search algorithm for finding the computational element in which the particle is placed In this research in addition to complete surveying about these algorithms two efficient algorithms namely those of Blasco Chorda and Haselbacher Najjar where adopted due to their simplicity in coding and efficiency in computational time For a comparison between these algorithms two groups of problems are considered the first group considers motion of particles in simple flow fields for which analytical solutions of the Eulerian phase exist The second group considers the dynamics of particles in complex flows for which CFD solutions of the flow fields are required The first group includes the motion of particles exposed to gravity force motion of particles in free and force vortex flows and motion of particles exposed to the Brownian force The second group includes the motion of particles in a backward facing step and motion of particles in separating cyclones Results obtained show very good degree of accuracy and acceptable computational time for both algorithms However the Haselbacher Najjar algorithm shows better performance in most cases Keywords Particle Tracking Two Phase Flow Unstructured Grids Lagrangian Method

محسن دوازده امامي، محمد سعيد سعيدي

احمدرضا پيشه ور، محمدرضا سليم پور