Search results for "Heat mass transfer"
showing 3 items of 3 documents
Rotating magnetic fields as a means to control the hydrodynamics and heat/mass transfer in the processes of bulk single crystal growth
1999
The report discusses the possibility of using different types of rotating magnetic fields (RMF) and combinations of these to control the hydrodynamics and heat/mass transfer in the processes of bulk semiconductor single crystal growth. Some factors contributing to the efficiency of RMF influence in different technologies are analysed. Their specific practical application is illustrated by some examples.
Influence of combined electromagnetic fields on the heat/mass transfer in the Bridgman process
2002
The influence of combined magnetic fields (travelling and rotating) on the characteristics of heat/mass transfer with an aim to obtain the needed profile of the interface is considered, that is a necessary condition, which insures the homogeneity of single crystal content. The crystallization process of a cylindrical sample is considered. It was presumed that the sample moves with a permanent velocity towards the cold part of the heater and a partial-linear temperature distribution characteristic to the Bridgman method was set in along the heater's length. Permanent temperature values were set in on the top and bottom edges of the calculation mesh. It has been shown that combinations of dif…
Heat and mass flows coupled with stress in a continuous medium
1996
Abstract The present paper is concerned with the formulation of the generalization of theories describing heat and mass flows in a continuous medium. The considerations are based on the non-equilibrium thermodynamics. As a result the fundamental equations for the mass and heat fluxes and for the thermodynamic and mechanical fields, are obtained and the corresponding set of differential equations is formulated. Certain differences are pointed out between the general theories presented here and the thermodiffusion theory and the theory of mixtures. A thermodynamic variational principle is constructed. All the investigations concern only flows with a single temperature field. Copyright © 1996 …