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The purpose of this work is to design and develop a type of experiment setup that would enable the direct observation of steady diffusion process in situ. Two different optical methods - shadowgraph and shearing interferometry - were used for the first time to visualise and quantitatively analyse the diffusion around a droplet of organic substance in supercritical carbon dioxide (SCCO2) as well as...
Investigations at ambient pressure and water for working fluid using a steam-heated single tube natural circulation evaporator revealed a novel type of geysering. This mode appears during start-up of the evaporator and changes to density wave oscillation type I with rising heating steam pressure and decreasing subcooling of the working fluid. The observed operational state is dominated by two interacting...
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