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題 名 | 應用邊界附合座標轉換及序列化網格編排技術求解二維不可壓縮層流=Applied Body-Fitting Coordinate Transformation and Serial Grid Arrangment to Solve Two-Dimension Imcompressible Flow |
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作 者 | 曾振遠; 楊國威; | 書刊名 | 農業工程學報 |
卷 期 | 42:2 1996.06[民85.06] |
頁 次 | 頁27-40+26 |
分類號 | 443.42 |
關鍵詞 | 邊界附合座標; 多區間劃分; 序列化網格編排; 向後突張管路; 垂直分岐管路; 圓形障礙物; Body-fitting coordinate; Multi-block; Serial grid arrangment; Backward step; 90 degree bifurcation; Flow past a circular cylinder; |
語 文 | 中文(Chinese) |
中文摘要 | 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,並將網格予以序列化編排,將格點座標及各計算參數等資料依序列化的方式記錄,並使用雙倍密度網路及拉氏元素之權重內插函數計算轉換參數,與MAC計算方式結合成為一數值模式。 本研究向後突張管路、垂直分岐管路及均勻流通過圓形障礙物等三種流場為模擬對象,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序列化網格之模式架構確為有限差分法在流場模擬上開拓更廣之空間。 |
英文摘要 | The goal of this research is to construct a numerical model to simulate two-dimensional incompressible laminar flows with various geometric boundaries. This numerical model utilizes Body-Fitting Coordinate Transformation, Multi-Block, Two-Boundary Linear Interpolation to generate computational grid and rearranges grid by serial. The transformation parameters are calculated by using double density grid and Lagrangian Element weighted function. The MAC scheme is used as solver. Three two-dimensional incompressible laminar flows have been simulated to demonstrate the applications of the proposed model. Three are flow past a backward step, flow past a 90 degree bifurcation, and flow past a circular cylinder. The numerical results show that the model has good accuracy, well convergent rate and robust. The model does provide a new process for the Finite Difference Method to cope with the geometric boundaries easily. |
本系統中英文摘要資訊取自各篇刊載內容。