Персона:
Боговалов, Сергей Владимирович

Организационные подразделения

Организационная единица

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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Боговалов

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Сергей Владимирович

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Теперь показываю 1 - 10 из 47

Только метаданные
Waves in strong centrifugal field: dissipative gas
(2019) Bogovalov, S. V.; Kislov, V. A.; Tronin, I. V.; Боговалов, Сергей Владимирович; Кислов, Владимир Александрович; Тронин, Иван Владимирович
In the fast rotating gas (with the velocity typical for Iguassu gas centrifuge), three families of linear waves exist with different polarizations and law of dispersion. The energy of the waves is basically concentrated at the axis of rotation in the rarefied region. Therefore, these waves decay on the distance comparable with the wavelength. There is only one type of waves propagating strictly along the axis of rotation with the law of dispersion similar to ordinary acoustic waves. These waves are interested for the physics of gas centrifuges. The energy density of these waves concentrates at the wall of the rotor. These waves have weak damping due to the molecular viscosity and heat conductivity. The damping coefficient is determined for this type of waves by numerical calculations. Analytical approximations for the damping coefficient are defined as well. At the parameters typical for the Iguassu centrifuge, the damping is defined by interaction of the waves with the rotor wall.
Только метаданные
Verification of numerical codes for modeling of the flow and isotope separation in gas centrifuges
(2013) Bogovalov, S. V.; Borisevich, V. D.; Borman, V. D.; Kislov, V. A.; Tronin, I. V.; Tronin, V. N.; Тронин, Иван Владимирович; Боговалов, Сергей Владимирович; Борисевич, Валентин Дмитриевич; Кислов, Владимир Александрович
A new method for verification of numerical codes for modeling of gas flow and isotope separation in gas centrifuges (GC) is proposed. The method is based on a semi-analytical solution of the problem of gas circulation in the rotating cylinder (rotor) with an infinite length. The problem is solved for a small amplitude perturbation of the rigid rotation of the gas. It is assumed that the circulation drives, thermal or mechanical origin, vary with the coordinate along the rotation axis harmonically. Solution of the system of equations in partial derivatives is reduced to the solution of the system of ordinary differential equations which can be solved with any accuracy by well known methods. The gas circulation in the solution consists of the system of vortexes periodically located along the rotation axis. The comparison of the semi-analytical solution with the numerical one is possible provided that periodical boundary conditions are specified at the end caps of the rotor of GC. Special attention is paid to the case when the conventional rigid wall boundary conditions are specified at the end caps of the rotor. It is shown that the developed semi-analytical solution can be applied for the verification of the numerical codes in this case as well.
Неизвестно
Waves in strong centrifugal fields: dissipationless gas
(2015) Bogovalov, S. V.; Kislov, V. A.; Tronin, I. V.; Тронин, Иван Владимирович; Боговалов, Сергей Владимирович; Кислов, Владимир Александрович
Linear waves are investigated in a rotating gas under the condition of strong centrifugal acceleration of the order 106g realized in gas centrifuges for separation of uranium isotopes. Sound waves split into three families of the waves under these conditions. Dispersion equations are obtained. The characteristics of the waves strongly differ from the conventional sound waves on polarization, velocity of propagation and distribution of energy of the waves in space for two families having frequencies above and below the frequency of the conventional sound waves. The energy of these waves is localized in rarefied region of the gas. The waves of the third family were not specified before. They propagate exactly along the rotational axis with the conventional sound velocity. These waves are polarized only along the rotational axis. Radial and azimuthal motions are not excited. Energy of the waves is concentrated near the wall of the rotor where the density of the gas is largest.
Только метаданные
Preface
(2022) Bogovalov, S. V.; Боговалов, Сергей Владимирович
Только метаданные
Barodiffusion Mechanism of Separation of an Isotopic Gas Mixture in Superstrong Centrifugal Fields Under the Impact of an Acoustic Wave
(2024) Bogovalov, S.V.; Dzhulya, D.N.; Tronin, I.V.; Боговалов, Сергей Владимирович; Джуля, Денис Николаевич; Тронин, Иван Владимирович
Только метаданные
Simulation of a Hydrodynamic Stellar Wind from a Rapidly Rotating Star
(2019) Bogovalov, S. V.; Romanikhin, S. M.; Tronin, I. V.; Боговалов, Сергей Владимирович; Тронин, Иван Владимирович
© 2019, Pleiades Publishing, Inc. The mechanism for the formation of disk-like flows from rapidly rotating Be stars is not yet clear. An axisymmetric hydrodynamic stellar wind flow from a rapidly rotating star has been simulated numerically as a step in solving this problem. The change in the shape of the star as it rotates and the turbulence excited in the stellar wind at Reynolds numbers ∼10 9 −10 13 are taken into account. Calculations show the formation of a disk-like flow from the stellar surface at the equator, which expands into the polar regions due to a pressure gradient on scales of the order of the stellar radius. A poloidal velocity vortex is formed at high latitudes. No turbulence is excited near the equator within the simplest standard models and, therefore, no quasi-Keplerian disk-like flow emerges in the equatorial plane. A dependence of the total mass flux on the stellar rotation rate at various surface temperatures has been obtained.
Только метаданные
3-D Numerical Modeling of MHD Flows in an Aluminum Reduction Cell
(2019) Pianykh, A. A.; Tkacheva, O. Y.; Radzyuk, A. Y.; Bogovalov, S. V.; Tronin, I. V.; Боговалов, Сергей Владимирович; Тронин, Иван Владимирович
© 2019 IOP Publishing Ltd. All rights reserved.Three-dimensional numerical modeling of processes in an aluminum electrolytic cell at a current of 9 kA is performed. The model considers the nonlinear temperature dependence of all physical characteristics of materials. The specificity of the work is the inclusion in the model of the dynamics of the gas formed during the operation of the cell. The bubble motion, magnetic forces and heat convection essentially affect the overall dynamics of the electrolyte and metal. Calculations were carried out using the commercial software packages ANSYS CFX 18.2 and ANSYS Maxwell united with the aid of the user FORTRAN program.
Открытый доступ
Волны в сверхсильных центробежных полях
(2023) Боговалов, С. В.; Джуля, Д. Н.; Кислов, В. А.; Тронин, И. В.; Кислов, Владимир Александрович; Джуля, Денис Николаевич; Боговалов, Сергей Владимирович; Тронин, Иван Владимирович
В докладе представлены исследования волновых процессов в газе в сверхсильных центробежных полях, достигающих 10 6 g . Такие условия реализуются в газовых центрифугах для разделения изотопов. Получен полный спектр волн, состоящий из пяти мод. Обсуждаются связь этих волн с внутренними волнами в гравитационном поле. Есть общие черты и существенные различия. Особый интерес представляют обнаруженные нами чисто акустические волны, продольно поляризованные и распространяющиеся строго вдоль оси вращения во всем диапазоне частот. Плотность энергии этих волн концентрируется вблизи стенок ротора. Эти волны имеют наименьшее затухание по сравнению со всеми остальными типами волн. Даются оценки декремента затухания этих волн. Обсуждается возможное влияние этих волн на динамику газа и на процесс разделения бинарных смесей изотопов в газовых центрифугах.
Открытый доступ
Damping of sound waves in strong centrifugal field
(2015) Bogovalov, S. V.; Kislov, V. A.; Tronin, I. V.; Тронин, Иван Владимирович; Кислов, Владимир Александрович; Боговалов, Сергей Владимирович
A method for numerical calculation of the sound wave damping and dispersion law in a strong centrifugal field of the order of 106 g is considered. The damping is defined from the width of the resonance peak for different wave vectors. In the strong centrifugal field damping of the sound waves essentially exceeds the damping in the quiescent gas. © 2015 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
Только метаданные
Waves in Gas Centrifuges
(2025) Bogovalov, S. V.; Dzhulya, D. N.; Kislov, V. A.; Tronin, I. V.; Боговалов, Сергей Владимирович; Джуля, Денис Николаевич; Кислов, Владимир Александрович; Тронин, Иван Владимирович