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Information × Registration Number 0216U005757, 0113U003012 , R & D reports Title "To develop the models of heat and mass transfer processes during directional solidification in microgravity" popup.stage_title Head Fedorov Oleg Pavlovich, Registration Date 10-02-2016 Organization Space Research Institute of National Academy of Sciences of Ukraine and State Space Agency of Ukraine popup.description2 Experimental and theoretical study of directional solidification process aimed to creating the space sample instrumentation were described. Bridgman and floating zone methods as the basic technologies for crystalline material obtaining were used. The materials under study are the transparent substance succinonitrile (for Bridgman's method) and silicon (for floating zone method). The mathematical models describing non-stationary heat and mass transfer and hydrodynamics melt crystallization processes by chosen methods were developed. The comparative analysis of hydrodynamic and thermal conditions in the melt during crystallization under ground and microgravity conditions by the computing experiment method was performed. The gravity and vibration sensitivities of the above methods of crystallization and the influence of vibration disturbances on the melt hydrodynamics for typical values of frequency and amplitude vibration were studied. The analytical expressions of stability areas of crystallization front for different values of melt flow speed were obtained. Product Description popup.authors Демченко В.Ф. Кірносова М.А. Машковский А.Г. Федоров О.П. popup.nrat_date 2020-04-02 Close