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Effect of surface tension‐driven flow on BaB 2 O 4 crystal growth from high temperature melt‐solution
Author(s) -
Pan Xiuhong,
Jin Weiqing,
Liu Yan,
Ai Fei
Publication year - 2008
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200711045
Subject(s) - marangoni effect , surface tension , convection , boundary layer , dimensionless quantity , schlieren , chemistry , flow (mathematics) , mechanics , vortex , marangoni number , crystal (programming language) , materials science , thermodynamics , optics , physics , computer science , programming language
The surface tension driven‐flow in BaB 2 O 4 (BBO) melt‐solution is visualized by differential interference microscope coupled with Schlieren technique, and the streamline of the steady thermocapillary convection is found to be in form of an axially symmetric pattern. Based on the observation of BBO crystal rotation caused by the convective vortex, the widths of interfacial concentration, heat and momentum boundary layer are calculated. The effect of thermocapillary convection on boundary layer thickness is also investigated. Results show that the width of boundary layer decreases linearly with the increasing of dimensionless Marangoni number. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)