用于建筑绕流模拟的零方程模型  

Zero-equation turbulence model for outdoor airflow simulation

作　　者：李丞[1] 李晓锋[1] 苏雅璇[1] 朱颖心[1] 

机构地区：[1]清华大学建筑学院,建筑技术科学系,北京100084

出　　处：《清华大学学报（自然科学版）》2013年第5期589-594,600,共7页Journal of Tsinghua University(Science and Technology)

摘　　要：为提高住区微环境模拟时的计算效率,该文提出了用以代替两方程湍流模型的零方程湍流模型。该模型经风洞实验验证,可达到与当前实际工程中常用的标准k-ε模型相近的计算精度。同时,实际尺度的建筑上应用的结果表明:该零方程模型对网格的要求比标准k-ε模型更低;同等计算条件下,该模型可使计算时间显著减少。通过减少网格数量,加快计算速度,该模型可有效改善计算效率,可作为今后实际工程应用中标准k-ε模型的有效替代者。A zero-equation turbulence model was developed to replace the widely used two equation model to improve the efficiency of outdoor airflow simulations for urban thermal environmental designs.Wind-tunnel data shows that the new zero-equation model gives results as reasonable as the standard kε-model.Use of the zero-equation model on practical size buildings showed that the zero-equation model requires less elements and less simulation time.By reducing the number of elements and the simulation time,the zero-equation model can significantly improve the efficiency of outdoor airflow simulations as a useful substitute for the standard kεmodels in practical applications.

关 键 词：室外建筑绕流 湍流模型 零方程模型 

分 类 号：TU984.113[建筑科学—城市规划与设计]