Control of Oscillatory Thermocapillary Convection in a Half-Zone Liquid Bridge by Circumference Round Heating
作者单位：Tokyo University of Science Chiba Japan Tokyo University of Science Chiba Japan
会议名称：《第六届中日微重力科学专题研讨会》
会议日期：2005年
学科分类：080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理]
关 键 词：Thermocapillary convection Half-zone liquid bridge Oscillation Control
摘 要：正1. INTRODUCTION Thermocapaillarity is of fundamental importance in material processing under microgravity condition. The floating-zone method （FZ） is a material process technique for producing and purifying single crystals of metals and oxides. It is widely known that, using this method, a transition to three-dimensional oscillatory thermocapillary convection takes place in the melt. The oscillatory state of the convection causes detrimental striations in the crystal structure, even under the microgravity condition . A half-zone model （HZ） has been employed to simplify the thermocapillary convection in FZ （fig.1）. In this model, two co-axial cylindrical rods hold a