ライブラリ登録: Guest
CHT-04 - Advances in Computational Heat Transfer III. Proceedings of the Third International Symposium
April, 19-24, 2004, on board MS Midnatsol Norwegian Coastal Voyage

DOI: 10.1615/ICHMT.2004.CHT-04


ISBN Print: 978-1-56700-174-7

ISSN: 2578-5486

MATHEMATICAL MODEL OF HEAT-MASS TRANSFER DURING CRYSTAL GROWTH PROCESS INCLUDING CLUSTER MODEL OF A MELT CONSTITUTION

page 12
DOI: 10.1615/ICHMT.2004.CHT-04.900
Get accessGet access

要約

The paper gives a brief analysis of current concepts about the processes of melt ordering and structural self - organization at the temperature close to melting point, including the interface area, when growing semiconductor single crystals. The experimental data confirm the existence of ordered growing units (clusters) in the melt under the conditions close to equilibrium crystallization. The conclusion is justified about the prospects of studying the processes of clusterization in the melt under the conditions of micro gravitation. A mathematical model of convection mass transfer is proposed as an independent tool. This model includes the equations of hydrodynamics, impurity transfer and convection flow in the interface in view of the medium cluster structure. Materials properties and the temperature are presented as a single - value function of enthalpy. For the first time the melt structural model near the crystallization front considers the availability of cluster formations which cause resistance to the melt flow. This resistance is described by analogy with a porous body by means of introduction of medium two - phase coefficient which depends on the enthalpy value in the assigned microvolume. The developed model allows the consideration of fundamental specific features of the processes of crystal growing from the melt. In particular, it enables heat and mass transfer to be calculated correctly both in the region core, and in the interface. The results of model testing are demonstrated, including the description of real orbital and ground processes of GaSb single crystal growing.

Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集 価格及び購読のポリシー Begell House 連絡先 Language English 中文 Русский Português German French Spain