پديد آورنده :
اعلايي، عليرضا
عنوان :
بهينه سازي جريان مذاب در تانديش ريخته گري مداوم در جهت حذف آخال ها
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
بيست،148ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
حسين ادريس، ابراهيم شيراني
استاد مشاور :
احمدرضا پيشه وراصفهاني، علي شفيعي
توصيفگر ها :
حل عددي , ديناميك سيالات محاسباتي , مدل سازي فيزيكي , جريان دو فازي , كسر جمعي سيال , فازهاي گسسته , جريان رو به بالا , معيارهاي مشابهت
تاريخ نمايه سازي :
18/11/89
استاد داور :
محمدرضا ابوطالبي، حسين سيدين، محمود اشرفي زاده
كد ايرانداك :
ID352 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتال
چكيده انگليسي :
165 Optimization of Fluid Flow for Inclusions Removal in Continuous Casting Tundish Ali Reza Alaei alaei45alireza@gmail com December 4 2010 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran H Edris Assoc Prof Supervisor Email h edris@cc iut ac ir E Shirani Prof Supervisor Email eshirani@cc iut ac ir A R Pishevar Assoc Prof Advisor Email apishe@cc iut ac ir A Shafyei Assoc Prof Advisor Email shafyei@cc iut ac ir Department Graduate Coordinator Dr M Panjepoor Assist Prof Abstract In continuous casting process the tundish optimization fluid flow pattern has a considerable role to removal inclusions and the quality of steel product To reach a suitable fluid flow pattern in tundish to separate non metallic inclusions from melt and transport to slag by upward molten flow is the aim of this work In this idea there is no need to use dam weir and turbo stopper therefore dead zones are reduced The non metallic inclusion particles have lower density than molten steel in real unit and the direction of flow pattern is upward thus it will rise up to the slag steel interface The fundamentals of the process physical and numerical modellings with persistence on numerical modellings have been conducted in this work Because of symmetric in distribution of fluid flow in model one half of the water model is investigated by numerical method and physical model is carried out with the utilization of a 1 4 scale model with similarity criteria as much as possible The geometry of water model is generated using the commercial package environment GAMBIT and then ready to inter the computational fluid dynamics CFD field is used to analysis design optimization of fluid flow and other applications of heat transport With attention to necessity of fluid flow pattern proposed two topics the wave shape of the free surface and the trajectory of inclusions in tundish were investigated using mathematical modellings and validity of numerical modelling is carried out in line with the physical modelling to examine details of the flow pattern in water model The situation of free surface is determined by solving the governing differential equations for turbulent flows using finite difference method at isothermal and unsteady state conditions with k model The initial and boundary conditions are determined by VoF Volume of Fluid method In VoF methods however one usually introduces a liquid indicator or Volume of Fluid field for liquid and gas which is a property of the fluid is considered and instantaneous properties viscosity and density are related linearly and with the commercial CFD package environment FLUENT is solved and results in form contours of density mixture versus time achieved and in physical model with a cane shroud is followed During the experiment a flat free surface is obviously seen The motion pass of inclusions are considered using forces such as drag buoyancy and gravitational forces Assumptions are spherical shape inclusions and monotonousness of inclusions size Trajectories of inclusions to slag melt interface with Stokes motion are determined by using Discrete Phase The contours of residence time and magnitude of velocity versus time were achieved and show how inclusions guide to free surface Key Words continuous casting tundish numerical modellings physical modelling VoF method discrete phase inclusions removal computational fluid dynamics upward flow
استاد راهنما :
حسين ادريس، ابراهيم شيراني
استاد مشاور :
احمدرضا پيشه وراصفهاني، علي شفيعي
استاد داور :
محمدرضا ابوطالبي، حسين سيدين، محمود اشرفي زاده
