Quench cooling under reduced gravity
| Autor: | Daniel Beysens, D. Chatain, C. Mariette, Vadim Nikolayev |
|---|---|
| Přispěvatelé: | Service des Basses Températures (SBT ), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
[PHYS]Physics [physics]
Gravity (chemistry) Materials science Critical heat flux Fluid Dynamics (physics.flu-dyn) Thermodynamics FOS: Physical sciences Physics - Fluid Dynamics 01 natural sciences 010305 fluids & plasmas Subcooling Physics::Fluid Dynamics PACS number(s): 47.55.np 68.03.Fg 47.15.gm Heat flux Flash-gas Boiling 0103 physical sciences Heat transfer 010306 general physics Nucleate boiling |
| Zdroj: | Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2013, 88, pp.013004. ⟨10.1103/PhysRevE.88.013004⟩ Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2013, 88, pp.013004. ⟨10.1103/PhysRevE.88.013004⟩ |
| ISSN: | 1539-3755 1550-2376 |
| DOI: | 10.1103/PhysRevE.88.013004⟩ |
| Popis: | International audience; We report quench cooling experiments performed with liquid O2 under different levels of gravity, simulatedwith magnetic gravity compensation. A copper disk is quenched from 300 to 90 K. It is found that the coolingtime in microgravity is very long in comparison with any other gravity level. This phenomenon is explained bythe insulating effect of the gas surrounding the disk. A weak gas pressurization (which results in subcooling ofthe liquid with respect to the saturation temperature) is shown to drastically improve the heat exchange, thusreducing the cooling time (about 20 times). The effect of subcooling on the heat transfer is analyzed at differentgravity levels. It is shown that this type of experiment cannot be used for the analysis of the critical heat flux ofthe boiling crisis. The film boiling heat transfer and the minimum heat flux of boiling are analyzed as functionsof gravity and subcooling. |
| Databáze: | OpenAIRE |
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