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.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第5期589-594,600,共7页
Journal of Tsinghua University(Science and Technology)
关键词
室外建筑绕流
湍流模型
零方程模型
outdoor airflow simulation
turbulence model
zero-equation turbulence model
