Affiliations: National Institute of Advanced Industrial Science and
Technology, Tsukuba, Ibaraki 305-8564, Japan | Nuclear Engineering Research Laboratory, University of
Tokyo, Tokai, Ibaraki 319-1188, Japan
Abstract: Marangoni convection, driven by interfacial instability due to a
surface tension gradient, presents a significant problem in the crystal growth
process. To achieve better materials processing, it is necessary to suppress
and control this convection, especially in crystal growth using Liquid
Encapsulated Czochralski techniques in which the melt is encapsulated in an
immiscible medium. Marangoni convection can occur at the liquid-liquid
interface and at the gas-liquid free surface. Buoyancy driven convection can
also affect and complicate the flow. The present report studied Marangoni
convection in a two-liquid layer system in an open and enclosed cavity. Flow in
the cavity was subjected to a horizontal temperature gradient. Interactive flow
near the liquid-liquid interface was measured by the Particle Image Velocimetry
(PIV) technique. The measured flow field is in good agreement with numerical
predictions.