Numerical Simulation and Experimental Study of Three-Dimensional Density-Stratified Flow

6th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Yang, Ming^1 ; Wang, Ming^1 ; Zhang, Fangxiu^1 ; Lai, Ruixun^1

Sediment Research Centre, Yellow River Institute of Hydraulic Research, YRCC, MWR, No. 45 Shunhe Rd., Zhengzhou, China^1

关键词: Calculation results;    Density stratified;    Feature parameters;    Rate parameters;    Sediment concentration;    Three-dimensional turbulence;    Turbulent stress;    Water channels;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/472/1/012080/pdf
DOI  :  10.1088/1757-899X/472/1/012080

来源: IOP

【 摘 要 】

The numerical relationship between vertical turbulence P/S σ tz turbulence and stratification feature parameters is established by analyzing the flux expression of turbulent stress / flux algebraic mode. Corresponding density change rate parameters reflecting changes in temperature and sediment concentration are introduced to correct the vertical diffusion coefficient of turbulent. A three-dimensional turbulence model with multi-phase coupling of water flow, temperature and sediment is established on this basis. The established standard Johnson water channel model is adopted for experimental study on the density-stratified flow model of temperature and sediment concentration and the experimental results are compared with the calculation results of three-dimensional density-stratified flow mathematical model.