Effect of nonstationary thermal gravitation-capillary convection on temperature distribution in a thin vertical wall

Autor:	V. S. Berdnikov, V. A. Gaponov, P. M. Likhansky, V. A. Markov, V. A. Grishkov
Rok vydání:	2010
Předmět:	Convection Nuclear and High Energy Physics Radiation Materials science Buoyancy Convective heat transfer Capillary action Bulk temperature Thermodynamics Film temperature Heat transfer coefficient Mechanics engineering.material Physics::Fluid Dynamics Heat transfer engineering
Zdroj:	Thermophysics and Aeromechanics. 17:181-191
ISSN:	1531-8699 0869-8643
Popis:	Time dependences of temperature distributions in a thin metal wall were studied experimentally under two conditions of convective heat transfer in a tank model. In the first case, the vertical working wall was heated from within due to a convective heat flux from the opposite wall heated monotonously, and it was cooled due to heat transfer to the ambient medium. Dependence of the temperature field on a thin wall at the stage of convective flow development was retraced with the help of the thermographic camera and thermocouple sensors. In the second case, the tank wall was heated uniformly by IR radiation from the outside, and non-stationary convective flow and volumetric liquid heating were formed inside. Time dependence of temperature distribution over the wall height is studied. It is shown that the flow structure and convective heat transfer in a fuel layer with free boundary are subjected not only to the buoyancy force, but also to the thermocapillary effect. The local features of the flow affect temperature distribution in a thin wall.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c9cc43559241b995c29372d43bbc59c2 https://doi.org/10.1134/s0869864310020034 Zobrazit plný text záznamu Full text from SpringerLink