Critical heat flux in a locally heated liquid film driven by gas flow in a minichannel |
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| Authors: | Zaitsev D. V. Rodionov D. A. Kabov O. A. |
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| Affiliation: | (1) Institute of Heat and Mass Transfer, RWTH Aachen University, Aachen, Germany;(2) Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia |
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| Abstract: | The rupture of a liquid film driven by friction with a gas flow in a horizontal minichannel and the heat-exchange crisis in this film locally heated by a 1 × 1 cm source in the channel wall has been experimentally studied. A heat flux of 250 W/cm2 is achieved, which is greater by an order of magnitude than the limiting heat flux for a vertically falling liquid film with the same Reynolds number (Re l = 21). These experiments confirmed good prospects for using gas-flow-driven liquid films in cooling systems of devices with intense local heat evolution. |
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