摘要
基于紊流掺混理论,根据尼古拉兹试验数据拟合了一个新的掺混长度公式,新公式计算结果和试验数据的相关系数为0.997。采用Rouse公式的两个假定并结合扩散方程,得到了一个新的含沙量垂线分布公式,该公式在区间(0,h]内形式一致,结构较为简单,同时克服了Rouse公式在水面处含沙量为0的缺陷。通过浙江台州、山东日照等近海海域实测资料的验证,表明新的含沙量垂线分布公式能够客观地反映悬移质含沙量沿垂线的分布规律。
Based on the turbulent mixing theory,a new mixing length formula was fitting out according to the Nikuradse test data,and the correlation between this formula and the test data reached 0. 997. With the Rouse two assumptions,and combined with the diffusion equa-tion,a new vertical distribution formula of suspended sediment concentration was derived. The structure of formula was simple and formal u-niformly in (0,h],the problem in the Rouse formula of the sediment concentration being zero on the surface was solved. Verified by the ob-served data of Taizhou in Zhejiang and Rizhao in Shandong,the deduced formula can accurately describe the vertical distribution of sediment concentration.
出处
《人民黄河》
CAS
北大核心
2015年第4期43-45,65,共4页
Yellow River
基金
江苏省自然科学基金重点研究专项(BK2011026)
国家自然科学基金资助项目(41276017)
关键词
尼古拉兹试验
紊动扩散系数
掺混长度
垂线分布
含沙量
Nikuradse test data
turbulent viscosity coefficient
mixing length
vertical distribution
sediment concentration
