建筑表面风压的三维数值模拟

本文采用数值模拟方法预测由近地三维流动风引起的建筑物的表面风压。文中运用一种扩展的ｋ－ε紊流封闭模型，导得了稳态流动风的统一形式的控制微分方程。采用控制容积法对微分方程作了离散，ＳＩＭＰＬＥＣ压力校正迭代算法实现了非线性离散化方程的求解。实例计算与分析比较表明，本文的模拟方法改善了对建筑物侧风面和顶面风压值的预测

THREE DIMENSIONAL NUMERICAL SIMULATION OF WIND PRESSURES ON BUILDINGS

In this paper, a numerical simulation method has been applied for the prediction of wind pressures on buildings induced by three dimensional surface boundary layer airflow. The governing differential equations of generalized form for steady wind flows were derived by means of an extended  k ε turbulence enclosure model. The control volume method was used to discretize the differential equations. With the SIMPLEC pressure correction iterative algorithm, the solution of the discretized nonlinear equations was obtamed and the calculation examples were given. The results show that the simulation method proposed in this paper improves the prediction accuracy of wind pressures on the side and the top walls of the buildings.