The examples are given in the application to Redmet-90M Cz puller for a large diameter Si single crystal growth.
This paper describes the general approach for Cz modelling, the content of CrystmoNet and remote interaction of its modules and examples of Cz modelling. Therefore, in recent years we have developed CrystmoNet program code on the basis of joint using our Сrystmo, Defects modules and well-known commercial program codes for fluid and solid state mechanics problems: Ansys Fluent – for fluid mechanics ( Fluient module), MSC.Marc Mentat – for radiative-conductive heat transfer and solid state mechanics ( Marc and Mentat modules) and Tecplot-360 – for graphic representation of results ( Tecplot module). However, the development of such codes for new technologically important mechanical models of fluid and solid state usually faces with known difficulties caused by limited resources of research groups. It was based on our own numerical approach and software modules for conjugated heat transfer in Cz silicon (Si) hot zone and the defect formation in dislocation-free Si crystals. An initial basis of the present work was a development of similar specialized code, too. The basis of most these works is specialized software codes, which have their own grid generators, solvers and graphics tools. Modern numerical modelling is focused on the conjugated solution of fluid and solid state mechanics problems in Cz crystal growth. On the other hand, there is the considerable scientific interest to a study of complex interaction of various physical processes influencing on the required crystal parameters. On the one hand, this is due to the great practical importance of this technology and ever-increasing requirements to the crystal quality and size. Introduction Czochralski (Cz) crystal growth modelling has became an important scientific problem, which is the subject of many publications.
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