A numerical study of floating zone crystal growth under microgravity

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Title:	A numerical study of floating zone crystal growth under microgravity
Author:	Zheng, Jingwen
Description:	A numerical scheme for floating zone crystal growth under microgravity is developed which integrates the heating, the transport phenomena in the melt and solids and the interfaces in the growth system. The thermocapillary flow in the melt is simulated. The interface shapes and positions are determined as part of the numerical solutions. The effects of operating conditions and material properties are investigated. The importance of applied thermal signatures is demonstrated. The results from the convection dominant cases (Ma gg 1) are compared with those from the conduction dominant cases (Ma ll 1). A body-fitted curvilinear coordinate system is applied to accommodate the curved moving interfaces. The finite difference method is employed to discretize the analytical equations and numerical solutions are obtained using SOR-Newton iteration method. The calculation is performed for floating zone growth of CdTe which has important applications to radiation detectors and infra-red sensors and is difficult to grow on the ground.
Permanent Link:	http://rave.ohiolink.edu/etdc/view?acc_num=case1059139611 http://hdl.handle.net/2374.OX/16926
Date:	1990

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