立方体周围湍流场特征状态数值模拟

Numerical simulation of turbulent flow features around a surface mounted cube

使用k-ε模型对较高雷诺数下垂直凸壁立方体周围的流场特征进行了流体动力学特征的三维数值模拟,并与已有文献中的实验结果进行了比较,得到与其相似的流动形式.计算结果说明现有计算流体力学软件具有对工程实际问题进行定性分析的能力,并指出改进预示结果应采取的措施,即使用准稳态边界条件下的模型计算结果,更接近实际情况,同时该计算结果对于各种建筑物的风压计算有实际参考价值.

A three dimensional numerical simulation is made of flow field features around a vertical convexwall cube with a high Reynolds number. The κ-ε model used is compared with experiments in the available literature. Calculated flow patterns are similar to experimental results, indicating that software based computational fluid dynamics can qualitatively analyze problems in actual engineering projects. Finally, it is shown that computational results will approach the actual conditions if the computation is undertaken under quasi-steady boundary conditions. Such results will be useful in predicting wind loads of buildings.