On the numerical performance of turbulent closure schemes in a 1D lake model

International Conference and Early Career Scientists School on Environmental Observations, Modeling and Information Systems: ENVIROMIS-2018

生态环境科学;计算机科学

Bogomolov, V.^1,2 ; Stepanenko, V.^2,3

Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch of the Russian Academy of Sciences, 10/3, Academichesky ave., Tomsk, Russia^1

Research Computing Center, Moscow State University, Leninskiye Gory str., 1, bld.4, Moscow, Russia^2

Faculty of Geography, Moscow State University, Leninskiye Gory str., 1, bld.1, Moscow, Russia^3

关键词: Convective mixing;    Lake model;    Mathematical properties;    Numerical performance;    Numerical scheme;    One-dimensional model;    Turbulence closures;    Turbulent closure schemes;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/211/1/012038/pdf
DOI  :  10.1088/1755-1315/211/1/012038

来源: IOP

【 摘 要 】

The turbulence closure is a crucial part of a lake model. The closures commonly used are different in underlying physics and mathematical properties, leading to contrasting numerical stability and computational efficiency. We tested the performance of the one-dimensional model LAKE using the k -closure and Henderson-Sellers turbulence parameterizations, with a convective mixing scheme, in idealized Kato-Phillips experiment and Lake Kuivajärvi (Finland) simulations. Our results demonstrate that k- closure allows for a physically realistic solution at timesteps Δt