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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/34821

    Title: 落膜系統之計算流體力學模擬
    Other Titles: Cfd simulation of a falling film system
    Authors: 張家蓓;Chang, Chia-pei
    Contributors: 淡江大學化學工程與材料工程學系碩士班
    張煖;Chang, Hsuan
    Keywords: 計算流體力學;微結構反應器;落膜;流體體積模式;兩相流;層流;computational fluid dynamics;Microreactors;falling film;VOF model;Two-phase flow;Laminar flow
    Date: 2009
    Issue Date: 2010-01-11 05:39:17 (UTC+8)
    Abstract: 本研究利用計算流體力學軟體(Computational fluid dynamics,CFD),模擬微結構落膜系統內之流力與熱傳特性。本研究採用FLUENT內之流體體積(Volume of fluid, VOF)模式,氣液界面間之熱傳面積與熱傳量則利用使用者定義函數(UDF,User defined function)計算。本研究限於層流範圍。
    The thesis studies the hydrodynamics and heat transfer for a microstructure falling film device by CFD simulation using FLUENT. VOF (Volume of Fluid) model is adopted. For calculating gas-liquid interface heat transfer, a User Defined Functions (UDF) is developed. The study is limited to laminar flow region.
    Grid independent study is conducted to determine the acceptable grid size. The model is used to simulate the profiles in the system, including velocity, pressure, phase and temperature. The model is further used to investigate the effects of system parameters, including surface tension, fluid flow rates, liquid density and viscosity, angle of inclination and temperature difference.
    Even for the laminar flow system, the simulation results indicate that the liquid film characteristics, such as the eddy, the wave, and the film thickness, are affected by the condition parameters studied. Regarding the film thickness and heat transfer coefficient, comparisons between simulated results and theoretical predictions also indicate discrepancies and the difference is larger for higher liquid Reynolds number. All these conclude that using CFD simulation to obtain the hydrodynamics and heat transfer characteristics for laminar falling film is necessary.
    Appears in Collections:[化學工程與材料工程學系暨研究所] 學位論文

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