Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/23524
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    Title: 以3D數值模擬及微奈米機電系統設計製造氣膠粒徑分析微晶片之研究
    The Study of Aerosol Particle Size Analysis with 3D Numerical Simulation and Micro-Electro-Mechanical-System Chip Design
    Authors: 陳鴻瑩
    Contributors: 職業安全衛生系
    Keywords: 
    虛擬衝擊器
    數值模擬
    Date: 2010
    Issue Date: 2011-02-22 15:39:37 (UTC+8)
    Abstract: 本研究是以數值模擬研究虛擬衝擊器的設計與氣膠微粒粒徑的純化收集及類。本虛擬衝擊器的設計如圖1,氣膠微粒從樣品流進入管道後,由邊鞘流將樣品流做流體聚焦。藉由下游的側邊流使氣膠微粒因垂直方向及水平方向的拖曳力比較,而選擇由垂直方向及水平方向出口達到純化及分離氣膠微粒粒徑的目的。由於氣膠的動量反應時間是非常短的(大約為10-4),在這樣短的動量反應時間,氣膠微粒是隨著流場所移動。因此虛擬衝擊器的流場對氣膠微粒的分離與純化扮演著很關鍵的因素。在此研究的模擬結果,可將樣品流速與邊鞘流速的比例作無因次的分析,而得到一操作曲線圖,可提供分離或純化氣膠微粒粒徑的操作參數。同時也發現,氣膠微粒粒徑分離的選擇性取決於時間因素,即氣膠微粒在流經右側出口的路徑時間L/V與氣膠微粒在管道移動的時間(D/2)/U比。
    Relation: 計畫編號:CN9937;計畫年度:99
    Appears in Collections:[Dept. of Occupational Safety] Chna Project

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