ON THE INFLUENCE OF STRATIFICATION AND SHEAR ON THE INLAND WATERS TURBULENT MIXING
The parametrization, which defines the dependence of the turbulent Prandtl number on the gradient Richardson number, is proposed in the paper. The parameterization was obtained on the basis of a modified model of turbulent closure, developed by L.A. Ostrovsky and Yu.I. Troitskaya back in 1987. In the model, the kinetic approach was used to determine the turbulent fluxes of impulse, kinetic and potential turbulence energies in the stratified medium. Proposed parameterization was used by the authors in the calculation of the thermo-hydrodynamic regime of inland water objects with the use of three-dimensional hydrostatic model with the modified k-e scheme, which allows to take into account the temperature stratification and its influence on the processes of turbulent mixing. The numerical experiment directed on research of influence of turbulent number of Prandtl on the description of processes of thermo-hydrodynamics of lakes and reservoirs on an example of the idealized water object has been carried out.