Numerical Analysis of Heat and Mass Transfer Enhancement Process Accompanying Interfacial Disturbance in Water Vapor Absorption

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概要

• 論文の詳細を見る

• The purpose of this study is to obtain basic knowledge of the heat and mass transfer processes as affected by interfacial disturbance induced by addition of surfactants. We apply a nonflowing bulk absorption model and assume that interfacial disturbance occurs randomly. Four governing equations-for continuity, laminar momentum, energy, and diffusion-are solved numerically to obtain the unsteady temperature and concentration distribution during vapor absorption with interfacial disturbance for various aspect ratios δ(D/L = thickness of absorbent solution/length of model cell) and random numbers of interfacial disturbance points. In this study, surface tension between the surfactant ( n-octanol) and absorbent solutions (H_2O/LiBr) is considered to be constant during the vapor absorption (i. e. , independent of concentration changes in the absorbent solution). The influence on the occurrence of random interfacial disturbance is quantified in terms of mean Sherwood number and Nusselt number for severalδ(=0.1, 0.3, 0.5, 1) and with variations in the number of random disturbance points (1 to 5) where disturbance randomly occurs on the model cell surface. As a result of these calculations, the absorption enhancement ratio (amount of vapor absorption with surfactant addition/amount of vapor absorption without surfactant addition) is obtained by comparison between surfactant-added and nonadded conditions, for the same calculation parameterδ.

• 一般社団法人日本機械学会の論文
• 1993-11-15

著者

• Kashiwagi Takao

  Department Of Mechanical Engineering For Production Tokyo Institute Of Technology

• Kashiwagi Takao

  Department Of Mechanical Systems Engineering Tokyo University Of Agriculture And Technology

• Rie Dong-ho

  Department Of Industrial Safety Engineering University Of Incheon

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• Experimental Study of Steam Absorption Enhancement in Accordance with Interfacial Turbulence into Aqueous Solution of LiBr : The Influence of a Noncondensable Gas
• Numerical Analysis of Heat and Mass Transfer Enhancement Process Accompanying Interfacial Disturbance in Water Vapor Absorption
• Computer Simulation of Vapor-Absorption Enhancement into H_2O/LiBr Absorbent by Marangoni Convection
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