摘要
采用数值模拟方法预测建筑风载及风环境时,计算区域的边界及界面离散的方法将直接影响风场解的收敛和准确性。基于结构化同位网格在建筑风场模拟中的应用,并结合控制容积法的离散及压力校正算法的实施,提出了合理的计算边界,且相应给出了压力校正方程的界面离散方法。经算例分析,上述方法不仅能保证迭代收敛并取得较为准确的风场解,而且实现了同一计算网格能适用于不同风向的模拟,提高了正交结构化网格的适用性。
When the numerical simulation is applied to the prediction of wind flow around buildings, the convergence and veracity of results depend on the boundary and discretization of boundary directly. Based on the application of structured nonstaggered grid to the simulation of wind flow around buildings, and combined with the use of the controlvolume method and the pressure-correction algorithm, the condition on computational boundary and division of pressurecorrection equation on boundary are proposed. Through the evaluation and analysis, this methods can ensure that the iterative process is convergent and the exact result is obtained. The same grid is applicable to the simulation of a problem under different wind directions and it enhances the applicability of orthogonal structured grid.
出处
《科技通报》
2006年第5期661-665,670,共6页
Bulletin of Science and Technology
基金
国家自然科学基金资助项目(59908010)
关键词
建筑风场
数值模拟
同位网格
边界处理
wind flow around buildings
numerical simulation
nonstaggered grid
boundary treatment
