The authors present in this paper results obtained from a parabolic flight campaign regarding ethanol sessile drop evaporation under reduced gravity conditions. Drops are created using a syringe pump by means of injection through a PTFE (polytetrafluoroethylene) substrate. The drops are recorded using a video camera and an infrared camera to observe the thermal motion inside the drop and on the heating substrate. The experimental set-up presented in this paper enables the simultaneous visualization and access to the heat flux density that is transferred to the drop using a heat flux meter placed between the heating block and the PTFE substrate. The authors evidence original thermal spreading phenomena during the ethanol drop creation on a heated PTFE substrate. The drop exhibits specific behaviour which is discussed here. This work is performed in the frame of a French-Chinese collaboration (project IMPACHT) for future experiments in a Chinese scientific satellite.
Evaporation of ethanol drops on a heated substrate under micrograyity conditions
Verdampfung von Ethanoltropfen auf einem erhitzten Substrat unter Mikrogravitationsbedingungen
International Topical Team Workshop on Two-Phase Systems for Ground and Space Applications, 5 ; 387-395
Microgravity Science and Technology ; 22 , 3
2010
9 Seiten, 8 Bilder, 2 Tabellen, 20 Quellen
Conference paper
English
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