摘要
低雷诺数k-ε模型适用于从湍流旺盛区到固体壁面的全范围,比标准k-ε模型的适用范围更宽。本文采用经典算例,对五种低雷诺数k-ε模型进行数值计算考核.计算结果表明在选取的算例中,NH模型的预测能力略优于其它模型;而标准k-ε模型则虽比大多数低雷诺数模型的计算量小,但对分离流动的预测能力较差。
Low Reynolds number k-ε models are applicable in the whole range from fully turbulent flow zone to the walls;their applicable range is wider than the standard k-ε model.In this paper,three turbulent flows with benchmark experimental data were selected for validation and comparison between five low Reynolds number k-ε models.The standard k-ε model was also included for comparison.The numerical results showed that in these models,the NH model was able to obtain better agreements with experiments than other four low Reynolds models.The standard k-ε model,however,obtained worse agreement for separated flows at less computational costs,as compared with low Reynolds k-ε models.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2014年第6期1091-1095,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.51176048)
关键词
低雷诺数模型
湍流模型比较
数值模拟
low Reynolds number k-e models
comparison of turbulence models
numerical simulation
