Персона: Горкунов, Сергей Владимирович
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Горкунов
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Сергей Владимирович
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- ПубликацияТолько метаданныеDynamics of front-like water evaporation phase transition interfaces(2019) Il'ichev, A. T.; Shargatov, V. A.; Gorkunov, S. V.; Шаргатов, Владимир Анатольевич; Горкунов, Сергей Владимирович© 2018 We study global dynamics of phase transition evaporation interfaces in the form of traveling fronts in horizontally extended domains of porous layers where a water located over a vapor. These interfaces appear, for example, as asymptotics of shapes of localized perturbations of the unstable plane water evaporation surface caused by long-wave instability of vertical flows in the non-wettable porous domains. Properties of traveling fronts are analyzed analytically and numerically. The asymptotic behavior of perturbations are described analytically using propagation features of traveling fronts obeying a model diffusion equation derived recently for a weakly nonlinear narrow waveband near the threshold of instability. In context of this problem the fronts are unstable though nonlinear interplay makes possible formation of stable wave configurations. The paper is devoted to comparison of the known results of front dynamics for the model diffusion equation, when two phase transition interfaces are close, and their dynamics in general situation when both interfaces are sufficiently far from each other.
- ПубликацияТолько метаданныеStability of finite perturbations of the phase transition interface for one problem of water evaporation in a porous medium(2020) Il'ichev, A. T.; Shargatov, V. A.; Gorkunov, S. V.; Шаргатов, Владимир Анатольевич; Горкунов, Сергей Владимирович© 2020 Elsevier Inc.We study global dynamics of phase transition evaporation interfaces in horizontally extended domains of porous layers where a water located over a vapor. The derivation of the model equation describing the secondary structures, which bifurcate from the ground state in a small neighborhood of the instability threshold in the case of a quasi-stationary approach to the description of the diffusion process, is presented. The resulting equation is reduced to the equation in the form of Kolmogorov-Petrovsky-Piskounov. The obtained approximate equation predicts the existence of stationary solutions in the full problem. To verify the obtained results, the numerical solution of the problem of the motion of the phase transition interface is performed using the original program code developed by the authors. The results of numerical simulation are used to verify the possibility of using stationary solutions obtained in the weakly nonlinear approximation to determine the scenario for the development of the initial localized finite amplitude perturbation. It is shown that the obtained approximate stationary solutions accurately predict the behavior of the perturbation in the vicinity of the turning point of the bifurcation diagram. A modification of the formulas describing an approximate stationary soliton-like solution is proposed in the case when the perturbation amplitude is comparable with the height of a low-permeable layer of a porous medium in which the phase transition interface is located. By numerical simulation it is shown that this modified approximate solution is in good agreement with the results of numerical calculation for the full problem.
- ПубликацияТолько метаданныеCritical Evolution of Finite Perturbations of a Water Evaporation Surface in Porous Media(2020) Il'ichev, A. T.; Gorkunov, S. V.; Shargatov, V. A.; Горкунов, Сергей Владимирович; Шаргатов, Владимир Анатольевич© 2020, Pleiades Publishing, Ltd.Abstract—: It is shown that the approximate steady-state solutions, which satisfy the model dissipative equation that describes the process of water evaporation in the neighborhood of the instability threshold of a phase transition interface, determine localized damped finite-amplitude perturbations when a certain condition is fulfilled. These steady-state solutions can be used for forecasting the scenario of the development of a perturbation with sufficient accuracy if this perturbation has no common points with any steady-state solution. If the initial position of the phase transition front is located between the spectrally stable solution and any of the steady-state solutions, this front damps. If the initial position of the front is located above at least one of the spectrally unstable steady-state solutions, then the solution is catastrophically restructured.
- ПубликацияТолько метаданныеTHREE-DIMENSIONAL MODELING OF SHOCK WAVE FORMATION AND THROWING OF METAL SHELLS BY HIGH-ENERGY COMPOUNDS(2021) Shargatov, V. A.; Gorkunov, S. V.; Шаргатов, Владимир Анатольевич; Горкунов, Сергей Владимирович
- ПубликацияОткрытый доступПРОГРАММНЫЙ КОМПЛЕКС ДЛЯ РАСЧЕТА ТЕЧЕНИЙ С УДАРНЫМИ ВОЛНАМИ В СЛОЖНЫХ СРЕДАХ МЕТОДОМ СГЛАЖЕННЫХ ЧАСТИЦ "SPH SHOCK WAVE SOLVER"(2022) Горкунов, С. В.; Шаргатов, В. А.; Горкунов, Сергей Владимирович; Шаргатов, Владимир АнатольевичПрограмма предназначена для проведения численного моделирования ударно-волновых процессов в упруго-пластических средах и химически реагирующих газах в трехмерной постановке методом сглаженных частиц (SPH). Областью применения программы является научное исследование распространения ударных волн в многофазных средах с учетом структурных особенностей материалов. К функциональным возможностям программы относятся: проведение параллельного моделирования с использованием MPI (Message Passing Interface); исследование ударно-волновых свойств материалов на макро- и мезоуровне; проведение гидродинамических и ударно-волновых расчетов реальных конструкций. Тип ЭВМ: IBM PC-совмест. ПК, многопроцессорные ЭВМ; ОС: Windows 10, Red Hat Enterprise Linux, Ubuntu 18.04 LTS, CentOS.
- ПубликацияОткрытый доступМатематическое моделирование нестационарных течений с ударными волнами в пространственно-неоднородных средах(НИЯУ МИФИ, 2023) Горкунов, С. В.; Горкунов, Сергей Владимирович; Шаргатов, В. А.