АС

А. С. Козелков

Nizhny Novgorod State Technical University

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Andrey Kurkin

Nizhny Novgorod State Pedagogical University

Efim Pelinovsky

Institute of Applied Physics

ВВ

В. В. Курулин

All-Russian Scientific Research Institute of Technical Physics

E. S. Tyatyushkina

Nizhny Novgorod State Pedagogical University

Ahmet Cevdet Yalçıner

Middle East Technical University

D. Yu. Strelets

Moscow Aviation Institute

Tatiana Talipova

Institute of Applied Physics

Kseniya Plygunova

All-Russian Scientific Research Institute of Technical Physics

D. A. Utkin

All-Russian Scientific Research Institute of Technical Physics

Narcisse Zahibo

Université des Antilles

Cooperative Institutions

Nizhny Novgorod State Technical University

Nizhny Novgorod State Pedagogical University

All-Russian Scientific Research Institute of Technical Physics

Institute of Experimental Physics of the Slovak Academy of Sciences

Russian Academy of Sciences

Sirius University of Science and Technology

National Research University Higher School of Economics

Institute of Applied Physics

Université des Antilles

V.I. Il'ichev Pacific Oceanological Institute

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Investigation of supercomputer capabilities for the scalable numerical simulation of computational fluid dynamics problems in industrial applications

Computational Mathematics and Mathematical Physics (2016)

А. С. Козелков В. В. Курулин С. В. Лашкин R.M. Shagaliev A. V. Yalozo

Speedup

Multigrid method

Large-Eddy Simulation

10.1134/s0965542516080091

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Citations (35)

Modeling Object Motion on Arbitrary Unstructured Grids Using an Invariant Principle of Computational Domain Topology: Key Features

Symmetry (2023)

A. V. Sarazov А. С. Козелков D. Yu. Strelets Roman Zhuchkov

This paper uses a finite volume algorithm to address the numerical modeling of fluid flow around moving bodies. The Navier–Stokes equations, which describe the flow of viscous compressible gas, along with key boundary conditions and discretization schemes, are presented. As the motion of boundaries typically leads to changes in the control volumes, the basic discretization schemes need to be adapted. This paper provides a detailed discussion on the adaptation of the initial system to deforming boundaries while preserving communication topology. The method for calculating the boundary velocity is a crucial element of the numerical scheme. The paper proposes an approach to reconstruct the boundary velocity vector using deformation analysis and the condition of geometric conservation. This approach ensures correct simulation results for arbitrary unstructured computational grids. A comparison of two approaches to reconstructing the boundary velocity vector for characteristic aviation problems in the direct formulation is presented. It is shown that the proposed approach allows for more accurate modeling of object motion on arbitrary grids using the “invariant” principle of the computational domain topology.

10.3390/sym15112081

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Citations (1)

Tsunami generated by the volcano eruption on July 12-13 at Montserrat, Lesser Antilles

Efim Pelinovsky Narcisse Zahibo P. N. Dunkley Marie Edmonds Richard A. Herd

A major collapse of a lava dome occurred at the Soufriere Hills Volcano (Montserrat, Lesser Antilles), culminating late in the evening (11:35 PM local time) on July 12, 2003 (03:35 GMT on 13 July). This generated a tsunami, which was recorded on Montserrat 2-4 km from the generating area and Guadeloupe, 50 km from Montserrat. Results of field surveys are presented. Tsunami wave height on Montserrat may have been about 4 m according to the location of a strandline of charred trees and other floating objects at Spanish Point on the east coast of the island. The wave height on Guadeloupe according to “direct” witnesses was about 0.5-1 m at Deshaies and near Plage de la Perle. The tsunami at Deshaies caused the scattering of boats as confirmed by fishermen and local authorities. Data from the field survey are in agreement with the predicted tsunami scenario obtained by numerical simulation.

Dome (geology)

Submarine volcano

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Citations (46)

Numerical modeling of the 2013 meteorite entry in Lake Chebarkul, Russia

Natural hazards and earth system sciences (2017)

А. С. Козелков Andrey Kurkin Efim Pelinovsky В. В. Курулин E. S. Tyatyushkina

Abstract. The results of the numerical simulation of possible hydrodynamic perturbations in Lake Chebarkul (Russia) as a consequence of the meteorite fall of 2013 (15 February) are presented. The numerical modeling is based on the Navier–Stokes equations for a two-phase fluid. The results of the simulation of a meteorite entering the water at an angle of 20° are given. Numerical experiments are carried out both when the lake is covered with ice and when it is not. The estimation of size of the destructed ice cover is made. It is shown that the size of the observed ice hole at the place of the meteorite fall is in good agreement with the theoretical predictions, as well as with other estimates. The heights of tsunami waves generated by a small meteorite entering the lake are small enough (a few centimeters) according to the estimations. However, the danger of a tsunami of meteorite or asteroid origin should not be underestimated.

10.5194/nhess-17-671-2017

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Citations (8)

Verification of the LOGOS Software Package for Tsunami Simulations

Geosciences (2020)

E. S. Tyatyushkina А. С. Козелков Andrey Kurkin Efim Pelinovsky В. В. Курулин

Verification results for the LOGOS software package as applied to numerical simulations of tsunami waves are reported. The module of the LOGOS software package that is used for tsunami simulations is based on the numerical solution of three-dimensional Navier–Stokes equations. The verification included two steps. The first step involved the verification of LOGOS free-surface flow simulations on the test cases of a collapsing water column and gravity water sloshing in a tank and the known test cases of wave generation by objects falling into water or lifted out of it. The verification of LOGOS specifically for tsunami simulations was performed using a reference set of international benchmarks including the propagation and run-up of a single wave onto a flat slope and a vertical wall, the sliding of a wedge-shaped body down a slope, flow around an island and wave run-up over an obstacle. The results of the verification simulations demonstrate that LOGOS provides sufficient accuracy in numerical simulations of tsunami waves, namely, their generation, propagation and run-up.

Logos Bible Software

Wedge (geometry)

10.3390/geosciences10100385

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Citations (10)

Development and Operation Modes of Hydrogen Fuel Cell Generation System for Remote Consumers’ Power Supply

Sustainability (2021)

А. Л. Куликов Alexey Loskutov Andrey Kurkin Andrey Dar’enkov А. С. Козелков

At the present stage of electric power industry development, special attention is being paid to the development and research of new efficient energy sources. The use of hydrogen fuel cells is promising for remote autonomous power supply systems. The authors of the paper have developed the structure and determined the optimal composition of a hybrid generation system based on hydrogen fuel cells and battery storage and have conducted studies of its operating modes and for remote consumers’ power supply efficiency. A simulation of the electromagnetic processes was carried out to check the operability of the proposed hybrid generation system structure. The simulation results confirmed the operability of the structure under consideration, the calculation of its parameters reliability and the high quality of the output voltage. The electricity cost of a hybrid generation system was estimated according to the LCOE (levelized cost of energy) indicator, its value being 1.17 USD/kWh. The factors influencing the electricity cost of a hydrogen generation system have been determined and ways for reducing its cost identified.

Stand-alone power system

Mains electricity

10.3390/su13169355

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Citations (7)

Методика связанного моделирования одномерных и трехмерных задач вычислительной гидродинамики

Matematicheskoe modelirovanie (2019)

Андрей Владимирович Ялозо A. V. Yalozo А. С. Козелков А. С. Козелков Андрей Александрович Куркин

Представлена методика связанного 1D-3D моделирования задач вычислительной гидродинамики. Методика основана на одновременном расчете трехмерных и одномерных областей и организации связи между двумя частями задачи посредствам передачи граничных условий. Область в трехмерном приближении моделируется на основе решения уравнений Навье-Стокса. Расчет одномерных областей основан на использовании основных законов сохранения и эмпирических характеристик элементов. Корректность предложенных решений проверяется на нескольких задачах. По всем задачам проводится сравнение полученных результатов с имеющимися аналитическими решениями либо экспериментальными данными.

10.1134/s0234087919120013

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Research on the accuracy of numerical simulation of acoustic perturbations in a fluid basing on Navier – Stokes equations

O. L. Krutyakova А. С. Козелков В. В. Курулин

Source

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Application of Non-Reflective Boundary Conditions in Three-Dimensional Numerical Simulations of Free-Surface Flow Problems

Geosciences (2022)

А. С. Козелков Andrey Kurkin D. A. Utkin E. S. Tyatyushkina В. В. Курулин

This paper considers the issue of using non-reflective boundaries for surface wave simulations within the framework of three-dimensional Navier–Stokes equations. We distinguish a wave damping approach among the known implementations of non-reflective boundary conditions in surface wave simulations. The approach employs a sponge boundary layer to dampen incident waves. In this paper, we describe implementations of this approach on unstructured meshes. We also present the calibration of free parameters, the values of which control wave damping efficiency and the amplitude of reflected waves. Comparison of the results obtained at different types of distribution for the free parameter was conducted. The implemented wave damping approach was tested by simulating a solitary wave propagating in a water tank. We demonstrate the use of damping non-reflective boundary conditions for the case of a wave traveling across the surface of a real body of water near Sakhalin Island while considering its bathymetry.

Free surface

10.3390/geosciences12110427

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Citations (2)

The Influence of Numerical Method and Grid Parameters on the Simulation Accuracy of Damped Oscillations of Free Floating Cylinder

Fundamental and Applied Hydrophysics (2022)

Kseniya Plygunova А. С. Козелков D. Yu. Strelets D. A. Utkin В. В. Курулин

The paper concentrates on the influence of grid parameters, the time step size, and the order of temporal and spatial approximation on the solution accuracy of the floating body problem. Damped free oscillations of the cylinder on the water surface is under consideration. The numerical simulation method of the floating bodies is based on the solution of a system of Navier-Stokes equations together with a VOF (Volume of Fluid) method. The Navier-Stokes equations are discretized using finite volume method (FVM), and solved by SIMPLE method. The motion of the body is ensured by the deformation of the computational grid. A CSF (Continuum Surface Force) model is used to account for the surface tension forces. The method is implemented in LOGOS software package. The research has shown that implementation of the second-order scheme for temporal and spatial discretization leads to a more accurate result. The relaxation factor of body surface force has no affects on the solution accuracy.

Free surface

Dynamic relaxation

Grid method multiplication

10.59887/fpg/kx4r-pr4d-fba8

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