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Multiphase Science and Technology

Publicou 4 edições por ano

ISSN Imprimir: 0276-1459

ISSN On-line: 1943-6181

SJR: 0.144 SNIP: 0.256 CiteScore™:: 1.1 H-Index: 24

Indexed in

FIN CONDENSATION IN VARIABLE GRAVITY ENVIRONMENT

Volume 26, Edição 1, 2014, pp. 63-81
DOI: 10.1615/MultScienTechn.v26.i1.20
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RESUMO

We report on a condensation experiment of pure HFE-7100 on a curvilinear brass fin of 16 mm height cooled from the base by a Peltier/heat pipe/heat sink assembly. The experiment has been carried out in variable gravity environment aboard the Airbus A300 Zero-G aircraft of the European Space Agency performing parabolic trajectories during which the gravity has been varied from 1g to 1.8g and eventually to 10-2g. An afocal optical system has been developed to measure the condensate liquid film on the fin with an accuracy of around 6 µm. The temporal evolutions of the liquid film thickness along the fin is determined and used to deduce the local Nusselt numbers in various gravity conditions. The derived heat of condensation increases in hypergravity and decreases noticeably during microgravity. This means that in microgravity a condenser should be designed with a larger surface area than on ground. We have also noticed local troughs of the film thickness most likely due to manufacturing imperfections of the fin.

CITADO POR
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  2. Buffone Cosimo, Grishaev Viktor, Glushchuk Andrey, Experimental investigation of liquid retention in a cyclone evaporator under variable gravity conditions, Applied Thermal Engineering, 99, 2016. Crossref

  3. Buffone Cosimo, Sefiane Khellil, Bennacer Rachid, Liu Bin, Effect of external convection on evaporating cooling for a volatile meniscus, Experimental Thermal and Fluid Science, 89, 2017. Crossref

  4. Buffone Cosimo, How external buoyancy controls the Marangoni convection for a volatile meniscus inside a pore, International Journal of Thermal Sciences, 138, 2019. Crossref

  5. Glushchuk Andrey, Minetti Christophe, Machrafi Hatim, Iorio Carlo S., Experimental investigation of force balance at vapour condensation on a cylindrical fin, International Journal of Heat and Mass Transfer, 108, 2017. Crossref

  6. Barakhovskaia Ella, Glushchuk Andrey, Queeckers Patrick, Iorio Carlo S., Stabilisation of condensate flow from curvilinear surfaces by means of porous media for space applications, Experimental Thermal and Fluid Science, 121, 2021. Crossref

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