本研究以區域法(Zonal approach)切割紊流流場，其最大優點是可簡化具複雜幾何外型之計算，並能夠以區域分割之觀念，於叢集式(Cluster)計算發揮良好應用。

　　模擬的物理問題包含:將背向階梯流(Backward Facing Step Flow)區分成數個區塊計算，並與Direct Numerical Simulation (DNS)直接數值模擬資料做比較，證明其程式正確性。其次，紊流模式選用k-ε模式之Abe et al.(1994)以及k-ω模式之Shear Stress Transport(1994)兩種作為測試，俾使能得到良好之參考價值。最後以具有收集槽以及饋料口之實際渠道流(Channel Flow)為題進行模擬，以說明其應用性。

　The study aims at applying the Zonal approach to turbulent flow field computation. The zonal approach, wherein the given region is subdivided into zones and the grid for each zone is generated independently, makes the grid-generation process for the objects with geometric complexity and for the regions requiring selective grid refinement a fairly simple task.

　Two test problems are investigated. First one is to calculate the backward facing step flow field, whose region is divided into several sub-domains by means of the zonal approach, and then compare the predicted results with the available Direct Numerical Simulation (DNS) data to validate of computer code. The turbulence models, including the low-Reynolds-number k-ε model developed by Abe et al. (1994) and the k-ω model developed by Menter(1994), and tested in the study. The zonal approach is , then , applied to the flow field simulation of a gravitational setting chamber for demonstration.

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