Experimental Study of Interfacial Shear Stress for an Analogy Model of Evaporative Heat Transfer

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概要

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• In this study, we conducted measurements of an evaporative interfacial shear stress in a passive containment cooling system (PCCS). An interfacial shear stress for a counter-current flow was measured from a momentum balance equation and the interfacial friction factor for evaporation was evaluated by using experimental data. A model for the evaporative heat transfer coefficient of a vertical evaporative flat surface was developed based on an analogy between heat and momentum transfer. It was found that the interfacial shear stress increases with the Jacob number, which incorporates the evaporation rate, and the air and water Reynolds numbers. The relationship between the evaporative heat transfer and the interfacial shear stress was evaluated by using the experimental results. This relationship was used to develop a model for an evaporative heat transfer coefficient by using an analogy between heat and mass transfer. The predictions of this model were found to be in good agreement with the experimental data obtained for evaporative heat transfer by Kang and Park.

• 2008-06-01

著者

• Kwon Hyuk

  Department Of Internal Medicine Dong-a University College Of Medicine

• Kwon Hyuk

  Department Of Nuclear Engineering Seoul National University

• PARK GoonCherl

  Department of Nuclear Engineering, Seoul National University

• MIN ByungJoo

  Korea Atomic Energy Research Institute

• Park Gooncherl

  Department Of Nuclear Engineering Seoul National University

• Kwon Hyuk

  Department of Chemical and Biomolecular Engineering, KAIST

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