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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/2035

    Title: 轉注成型充填過程巨微觀流交界面之數值模擬;Numerical Simulation of Resin Transfer Molding in Interface within Fiber Tows
    Authors: 張袁瑞;Yuan-Jui Chang
    Contributors: 機械工程研究所
    Keywords: 擾動厚度;有限擴散聚集;滲透度;布林克曼方程式;蒙地卡羅法;多孔性介質;transition thickness;diffusion limited aggregation
    Date: 2001-07-17
    Issue Date: 2009-09-21 11:36:52 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本文主要模擬定流率充填下,當樹脂流經纖維束時,由於滲透度的差異所造成的壓力梯度及流動面速度不同造成擾動厚度,並探討充填階段毛細位移對流動面之影響及入口壓力之變化。流體流經纖維束的過程可視為流經多孔性介質,本文以布林克曼方程式來描述流場巨觀流及微觀流交界面之流動情形,以簡單正交法產生隔點,並配合有限體積法及蒙地卡羅法來預測流動面下一個可能位移粒子及其位移方向。其模擬結果可顯示出纖維束滲透度比值不同與充填流量不同對充填過程中流動面變化有絕對性的影響,而入射壓力相對於不同物理參數亦呈現出不同的變化。 In this study, the simulation was confined under a constant flow rate that past a prepared fiber mats. Due to the difference of pressure gradient and the velocity past a cylinder-like fiber bundle result in transition thickness. Based on the rheological phenomena of flow in porous media. Brinkman equation is applied throughout the macro- and micro- description of the flow field. A simulation that utilize Monte Carlo decision-making process on the random walk in a simple orthogonalize network model is well conducted. Results show that the permeability difference between fiber mats and fiber bundle are the major mechanism of void formation. The inlet pressure with different filling flow rate was also investigated.
    Appears in Collections:[機械工程研究所] 博碩士論文

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