Skin Friction, Heat Transfer, and Condensation Rate for Binary Cryogenic Flow over a Flat Plate
The use of low-temperature liquids, such as liquid hydrogen and oxygen for rocket engine fuels, etc., has stimulated research on cryogenic science in recent years. Available publications in this field deal mainly with the development and improvement of low-temperature processes and equipment. A considerable amount of work is concerned with’the thermodynamic and transport properties of cryogenic fluids in the gaseous and the liquefied states. The fluid mechanics and heat transfer in the cryogenic process are fundamentally the same as those in the ordinary fluid flow and9 hence, a design engineer usually relies on formulas for ordinary fluid flow to predict the heat and mass transfer in cryogenic flow. However, such formulas are not always available. For example, the problem of binary flow involving phase changes still has not been fully investigated and one cannot predict with confidence the heat and mass transfer in binary cryogenic flow undergoing a phase change (vaporization or condensation). Such a problem is encountered in many engineering applications, such as the separation of gases by means of condensation. Furthermore, multiphase fluid flow is always of academic interest. Consequently, it is the purpose of this analysis to establish approximate relationships for determining the skin friction, heat transfer, condensation rate,and liquid composition for flow of a binary mixture of gases past a flat plate at a temperature below the saturation temperature for the mixture composition present in the free stream.
KeywordsHeat Transfer Skin Friction Liquid Layer Condensation Rate Total Enthalpy
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