Evaporation of Water from Alumina Slurry Drop Containing Dissolved Poly(vinly alcohol)
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概要
- 論文の詳細を見る
A new method for simultaneous measurement of weight, temperature and surface area of an evaporating pendant drop in dry air has been proposed by using a precise analytical balance, a microcomputer with A-D converter, and a microscope with image acquisition system. Unsteady simultaneous measurements of weight, temperature and surface area of an alumina slurry drop and one containing dissolved poly(vinyl alcohol) (PVA) have been made for a wide range of free stream temperatures <I>T</I><SUB>∞</SUB> = 323–393 K and initial concentrations of PVA <I>C</I><SUB>PA0</SUB> = 0–10 wt% at free stream velocity <I>U</I><SUB>∞</SUB> = 0.72 m/s and initial concentration of fine alumina particles <I>C</I><SUB>A0</SUB> = 50 wt%.<BR>The dimensionless diffusion fluxes and Nusselt numbers of an alumina slurry drop are compared with those for a pure water drop and show a fairly good agreement with those for a water drop during the constant rate period of evaporation. The dimensionless diffusion fluxes of an alumina slurry drop containing dissolved PVA are affected by the initial concentrations of PVA and free stream temperatures and show a large deviation from those for a water drop, while Nusselt numbers show a fairly good agreement with those for a water drop.
- Society of Chemical Engineersの論文
- 1999-08-00
著者
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Taniguchi Izumi
Department of Cardiology
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Taniguchi Izumi
Department Of Chemical Engineering Tokyo Institute Of Technology
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Asano Koichi
Department Of Chemical Engineering Tokyo Institute Of Technology
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Huzimori Yasuko
Department of Chemical Engineering, Tokyo Institute of Technology
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Maeda Naohiko
Department of Chemical Engineering, Tokyo Institute of Technology
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Maeda Naohiko
Department Of Chemical Engineering Tokyo Institute Of Technology
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Huzimori Yasuko
Department Of Chemical Engineering Tokyo Institute Of Technology
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Asano Koichi
Department of Applied Chemistry, Utsunomiya University
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