INVESTIGATION OF THERMOHYDRODYNAMIC AND BIOGEOCHEMICAL PROCESSES IN INTERNAL WATER ON THE BASIS OF MODIFIED MODELS OF TURBULENT TRANSFER
153rd meeting of the seminar
«Mathematical modeling of geophysical processes: direct and inverse problems»
The seminar is devoted to the consideration of various aspects of mathematical modeling of physical processes in the atmosphere, hydrosphere and active layer of land, associated with solving problems arising in the study of the problems of climate change and the natural environment.
Seminar Organizing Committee
Doctor of Physics and Mathematics A.V. Glazunov (Marchuk Institute of Numerical Mathematics of RAS)
Doctor of Physics and Mathematics I.A. Repina (A.M. Obukhov Institute of Atmospheric Physics of RA)
Doctor of Physics and Mathematics V.M. Stepanenko (RCC MSU, Geographical Faculty of Moscow State University)
A.V. Debolsky (RCC MSU, A.M. Obukhov Institute of Atmospheric Physics of RAS).
|D.S. Gladskikh||Institute of Applied Physics RAS|
INVESTIGATION OF THERMOHYDRODYNAMIC AND BIOGEOCHEMICAL PROCESSES IN INTERNAL WATER ON THE BASIS OF MODIFIED MODELS OF TURBULENT TRANSFER.
(Based on PhD thesis)
This work is devoted to the creation of a system of computational technologies for the correct description of thermohydrodynamic and biogeochemical processes in land water bodies by developing new mathematical models and modifying existing ones.
The first part of the work provides an overview of the current state of the problem under consideration in the study of thermohydrodynamics and biogeochemistry of land water bodies, identifies the most relevant and unsolved problems to date, which were considered by the author in the dissertation work.
The second part is devoted to a numerical study of the evolution of the vertical thermal structure of a medium-sized closed fresh water body using the example of the lake part of the Gorky reservoir using the one-dimensional LAKE model. To set realistic data on the accompanying meteorological situation and, in particular, wind speed, without involving continuous measurements, three methods have been proposed.
In the third part, the problem of correctly describing turbulence in a stratified fluid is considered, and a modified model of turbulent transport is proposed, constructed on the basis of k-epsilon closure with the involvement of models that take into account the two-way transformation of the kinetic and potential energy of turbulent pulsations and remove the restriction on the description of turbulence at large values of the gradient number Richardson.
The fourth part is devoted to the study of the seasonality of the ice cover of large lakes and reservoirs of the Russian Plain and climate trends according to the JASON-1,2,3, TOPEX/Poseidon and SARAL satellite data.
The fifth part presents a three-dimensional model developed by the author for the generation, transport and sink of biogeochemical impurities in land water bodies, which complements the model of thermohydrodynamics of a closed water body.
The seminar will be held in the form of a webinar on the Zoom platform.
Topic: семинар "Математическое моделирование геофизических процессов: прямые и обратные задачи".
Time: April 07, 2022 05:15 PM Moscow (GMT+3)
Join Zoom Meeting: https://us02web.zoom.us/j/87938243179?pwd=K3U5eWh2RjdXR2w5U3VWZTRRVUNVUT09
Meeting ID: 879 3824 3179
Video recordings of the seminar are available on our youtube channel.
For communication on all issues related to the work of the seminar, please contact the academic secretary Andrey Vladimirovich Debolsky at email@example.com