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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/95654

    Title: 非結構化網格及邊界附合座標轉換於流場模擬之應用
    Other Titles: Apply Unstructured Grid and Body-Fitting Coordinate Transformation to Simulate Fluid Flow
    Authors: 曾振遠;李世鳴;楊國威
    Contributors: 淡江大學水資源及環境工程學系
    Keywords: 非結構化格點;邊界適合座標轉換;不可壓縮層流;有限差分法;幾何邊界;圓柱體;Unstructured Grid;Body-Fitting Coordinate Transformation;Incompressible Laminar Flow;Finite Difference Method;Geometric Boundary;Circular Cylinder
    Date: 1993-10
    Issue Date: 2014-02-12 20:33:34 (UTC+8)
    Publisher: 臺南市:成功大學
    Abstract: 本研究發展一數值模式以模擬各種不同幾何邊界下之二維不可壓縮層流流場。此數值模 式應用邊界附合座標轉換處理邊界,多區間型 展開方式及二邊界線性內插方式產生計算網格,並將網格予以非結構化,以採用非結構化網 格之資料結構記錄資料,使用雙倍密度網格及 Lagrangian Element之權重內插函數計算轉換參數,並與MAC計算方式結合成為一數值模式。本研究 以拉板淘穴、向後突張管路、垂直分歧管路及 均勻流通過圓形障礙物等四種流場為模擬對 象,將所得結果與前人研究比較、驗證。結果 顯示本數值模式具備精確性高、收斂速度快、使用彈性大、擴充能力強等優點,可用於解析 不同之二維不可壓縮層流流場。本研究結果顯 示以邊界附合座標轉換及非結構化網格之模式架構為有限差分法在流場模擬上開拓更廣之空間。
    The goal of this research is intended to construct a numerical model to simulate two-dimensional incompressible laminar flows with different geometric boundaries. This numerical model applies Body- Fitting coordinate transformation, Multi-Block, Two-Boundaries linear interpolation to generate computational grid and the unstructured grid data format. Using double density grid and Lagrangian Element weighted function calculate transformation parameters and use MAC scheme as solver. Four various numerical two dimensional incompressible laminar flows have been simulated to approve simulation model which includes driven cavity, flow past a backward step, flow past a 90 degree bifurcation, and uniform flow past a circular cylinder. The numerical results show that the model has good accuracy, well convergent rate and robust. To sum up, this numerical model provides a new process for the finite difference method to cope with the geometric boundaries easily.
    Relation: 八十二年電子計算機於土木水利工程應用論文研討會論文集(二)=Proceedings of the Conference on Computer Applications in Civil and Hydraulic=Engineering (Volume 2),頁761-772
    Appears in Collections:[Graduate Institute & Department of Water Resources and Environmental Engineering] Proceeding

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    非結構化網格及邊界附合座標轉換於流場模擬 之應用.docx摘要14KbMicrosoft Word175View/Open
    非結構化網格及邊界附合座標轉換於流場模擬 之應用_西文摘要.docx摘要13KbMicrosoft Word103View/Open

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