摘要
最小能耗率原理发展至今,已有严密的理论证明,但缺少实测数据和数值模拟的验证。本文采用Flow3D中RNG k-ε紊流模型结合GMO法对顺直矩形水槽内的水流运动进行了数值模拟研究,通过选取不同断面之间的水流为研究系统,计算了各个时刻系统的单位体积水流能耗率变化。结果表明,矩形水槽内的水流运动确实遵循最小能耗率原理。
The minimum rate of energy dissipation has been rigorously proved by theory, but lacking of a large number of measured data and numerical simulation to proof it is a problem. RNG k-ε turbulence model and GMO model of Flow3D are applied to simulate fluid motion in a straight rectangular flume. Selecting the fluid between different sections as a system to study, the instantaneous rate of energy dissipation per unit fluid vol- ume of the system is calculated. The results show that the fluid motion in the rectangular tank follows the theo- ry of minimum rate of energy dissipation.
出处
《泥沙研究》
CSCD
北大核心
2013年第2期67-71,共5页
Journal of Sediment Research
基金
国家自然科学基金资助项目(50679053)
国家自然科学基金创新研究群体科学基金资助项目(51021004)
关键词
最小能耗率原理
RNGk-ε紊流模型
数值模拟
单位体积水流能耗率
theory of minimum rate of energy dissipation
RNG k-ε turbulence model
numerical simulation
rate of energy dissipation per unit fluid volume
