Experiments on Steady and Oscillatory Thermocapillary Convection in Space with Application to Crystal Growth
The various types of liquid motion (convection) due to inhomogeneities of the interfacial tension in free liquid surfaces are called Marangoni effects. The inhomogeneities of the interfacial tension can be of thermal or chemical origin. Marangoni effects are a common phenomenon for all liquids with a free surface (interface between liquid and gas or between liquid and liquid). Being surface effects, Marangoni effects are of higher importance in small volumina or near the free surface. Marangoni effects are flow phenomena which are independent of gravity. The investigation of Marangoni effects in an earth laboratory meets principle difficulties because they are invariably coupled with buoyant convection under normal gravity. Therefore experiments on Marangoni effects under microgravity in space are useful to investigate the pure surface tension driven flow.
KeywordsVortex Quartz Graphite Convection Hexagonal
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