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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/3311

    Title: 平板內賓漢流體之暫態流動型態受已知入口流量條件之影響
    Unsteady unidirectional flow of Bingham fluid between parallel plates with different given volume flow rate conditions
    Authors: 陳恕行
    Keywords: 賓漢流體
    Bingham fluid
    velocity profile
    pressure gradient
    Laplace Transform
    Trapezoidal piston motion
    Date: 2005-10-31
    Issue Date: 2009-08-14 00:13:11 (UTC+8)
    Abstract: 本研究為探討平板間,賓漢流體流動受已知入口流量條件之影響時,非穩態速度與壓力梯度分佈之情形。於平板入口施加已知且隨時間改變的體積流率,造成平板間流動情形之改變,根據此已知之入口條件,首先解出當條件分別為突然起動與等加速度之基本流動解,再將其結果應用於模擬實際情形之活塞運動中,首先此活塞先等加速至某一定速後,保持定速度一段時間,再等減速至停止,此活塞運動本文稱為梯形運動。In this paper, the velocity profile and pressuregradient of the unsteady state unidirectional flow ofBingham fluid between parallel plates are solved by theLaplace transform method. The flow motion betweenthe plates is induced by a prescribed arbitrary inletvolume flow rate which varies with time. Based on theflow conditions described, two basic flow situations aresolved; these are a suddenly started, and a constantacceleration, flow respectively. These two results arethen applied to a practical case that is a trapezoidalpiston motion which contains three phases of pistonmotion, the constant acceleration from the rest to afixed velocity, then keeping at this velocity, followingwith the constant deceleration to a stop. In addition,oscillatory flow is also considered. The result indicateswhen the yield stress 0 is equal to zero, the solutionto the problem reduces to that of a Newtonian fluid.
    Appears in Collections:[機械工程系所] 研究計畫

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