Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/10332
標題: 應用不同方法探討方柱形建築鄰近紊流風場之數值模擬研究
Simulation of Turbulent Flows Around a Building with a Square Cross-section by Using Different Numerical Methods
作者: 邱凱斌
Chiu, Kai-Bin
關鍵字: 數值模擬;Numerical Simulation;紊流模型;方形建築;Turbulence Model;Square Building
出版社: 土木工程學系所
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摘要: 
近年隨著計算機軟硬體的長足進步,藉其高速運算與大量數據處理能力,使用計算流體力學方法(computational fluid dynamics; CFD)分析風場並配合風洞試驗已成為國際風工程領域研究的重要工具。
本研究針對大氣邊界層中平坦空曠地形上高寬比4獨立方形建築物為基準問題,以文獻中風洞建築模型試驗量測資料,作為數值模擬來流及試驗結果驗證的基本依據。數值模擬分別採用自行發展的微可壓縮流法(weakly-compressible-flow;WCF)及商用套裝軟體FLUENT,使用空間平均(space average)的大渦模擬(large-eddy-simulation;LES)紊流模型模擬建築物鄰近之非恆定(unsteady)紊流風場,並比較兩個數值軟體在操作上之優缺點與風場模擬結果之差異性,繼而評估其實用性和可行性。

Due to significant advancement of computer hardware and software, by taking advantage of the high-speed computation and data treatment capability of computers, computational fluid mechanics has become an important tool world-widely in analyzing flow problems besides wind tunnel experiments,
In the study, the flow around an isolated square building in an open and flat territory, with an aspect ratio of 4, is selected as the bench-mark problem. Wind tunnel measurement are performed beforehand and the results are used as the basis to verify the validity of the predicted results by numerical simulations. On the other hand, two software are employed for the flow simulations. One is based on a weakly-compressible-flow method; the other is FLUENT, a commercial CFD software. In both the numerical computations, a space-averaged large eddy simulation is used to predict the resulting unsteady, turbulent surrounding flows. The accuracy of the predicted results as well as the convenience of handling the numerical calculations by both softwares will be assessed.
URI: http://hdl.handle.net/11455/10332
其他識別: U0005-0108201321471900
Appears in Collections:土木工程學系所

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