摘要
采用基于Reynolds时均N-S方程和RNGk-ε湍流模型的数值研究方法,分别对具有风洞试验结果的单幢方形截面建筑和多幢矩形截面建筑组成的建筑群周围的风环境进行了数值模拟,计算区域的划分采用具有良好适应性的四面体网格并用有限容积法对控制微分方程进行离散,利用FLUENT软件实现了整个流场的数值求解.计算结果显示,采用RNGk-ε湍流模型的数值计算值与风洞试验值相比,在建筑物的拐角分离区域偏大,背风负压区吻合良好,总体上较好.
Numerical simulation is carried out to investigate the wind environment around a single building and a building complex based on and the Reynolds averaged N-S equations and the RNG k-ε turbulence model. In the simulation, the computational domain was divided into tetrahedral elements with good adaptability and the finite-volume method was used for numerical discretization of the governing differential equations. The flow field was numerically solved by means of CFD software Fluent. In general, the numerical results using the RNG be turbulence model agree well with the previous wind speed ratio of the wind tunnel results in the area behind building, but the numerical results are overestimate near the corner.
出处
《浙江工业大学学报》
CAS
2007年第3期351-354,共4页
Journal of Zhejiang University of Technology
关键词
风环境
建筑群
风洞试验
数值模拟
wind environment
building complex
wind tunnal test
numerical simulation
