Персона: Тронин, Иван Владимирович
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Институт нанотехнологий в электронике, спинтронике и фотонике
Институт ИНТЭЛ занимается научной деятельностью и подготовкой специалистов в области исследования физических принципов, проектирования и разработки технологий создания компонентной базы электроники гражданского и специального назначения, а также построения современных приборов на её основе.
Наша основная цель – это создание и развитие научно-образовательного центра мирового уровня в области наноструктурных материалов и устройств электроники, спинтроники, фотоники, а также создание эффективной инновационной среды в области СВЧ-электронной и радиационно-стойкой компонентной базы, источников ТГц излучения, ионно-кластерных технологий материалов.
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Иван Владимирович
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- ПубликацияОткрытый доступHysteresis of Percolation Transition and Relaxation of Fast and Slow States of the System Nanoporous Medium-Non-Wetting Liquid(2020) Belogorlov, A. A.; Borman, V. D.; Bortnikova, S. A.; Byrkin, V. A.; Tronin, I. V.; Tronin, V. N.; Белогорлов, Антон Анатольевич; Бортникова, Светлана Алексеевна; Быркин, Виктор Александрович; Тронин, Иван Владимирович© 2020 Published under licence by IOP Publishing Ltd.In the present paper we present the results of experimental and theoretical studies of intrusion-extrusion and relaxation of non-wetting liquid in three Fluka porous media. New data on hysteresis of intrusion-extrusion and dependence of the degree of filling of a porous body on time in the process of extrusion were obtained experimentally. It has been established that in all the conducted experiments the liquid extrusion took place in two stages: at the first stage of fast relaxation the characteristic time of outflow is several seconds, at the second stage of slow relaxation the characteristic time is several hundred seconds. The experimental data obtained are described in the theoretical model [1]. For the studied porous media, the existence at the initial moment of time of local states with short leakage times (a few seconds or less) and states with large leakage times (hundreds of seconds) was established. Porous bodies in which the coexistence of fast and slow states at the initial moment of time is established are investigated for the first time.
- ПубликацияТолько метаданныеOptimal working regimes of the hyper-speed long Iguasu gas centrifuge(2020) Bogovalov, S. V.; Borman, V. D.; Vasilyev, A. V.; Tronin, I. V.; Tronin, V. N.; Боговалов, Сергей Владимирович; Васильев, Александр Владиславович; Тронин, Иван Владимирович© 2020 Published under licence by IOP Publishing Ltd.Rapid development of technologies for production of new materials may provide design of gas centrifuges (hereafter GC) with rotor speed above 1000 m/s. The question about efficiency of such GCs remains open. At present no experimental or theoretical studies regarding the separation effciency of such GCs exist. We present the results of calculations of the optimized separative power of the hyper-speed Iguassu GCs with a length of 1 to 5 meters and rotational speeds from 1000 to 1500 m/s. The calculations were performed in axisymmetric approximation in frameworks of the source-sink model. It is shown that for the hyper-speed GCs the optimized separative power, pressure at the rotor wall, feed flux and gas friction power linearly grow with the rotor length, while the temperature drop along the rotor does not depend on the rotor length.
- ПубликацияТолько метаданныеOptimized Separative Power of Hyperspeed Iguassu Gas Centrifuge: Dependence on the Rotor Diameter and Velocity(2020) Bogovalov, S. V.; Borman, V. D.; Tronin, I. V.; Tronin, V. N.; Боговалов, Сергей Владимирович; Тронин, Иван ВладимировичThe dependence of the separative power of Iguassu gas centrifuges (GCs) on the rotor diameter and velocity of rotation V above 1000 m/s is investigated. The separative power is calculated exploring numerical modeling of the gas dynamics and diffusion of the binary mixture in a strong centrifugal field. The separative power is optimized on five internal parameters of the GC: pressure at the wall of the rotor, feed flux, temperature drop along the rotor wall, friction power of the waste scoop and radius of the baffle of the product chamber. Enrichment of the product flux does not depend on the velocity and diameter in the optimal regime of exploration. Growth of the separative power withis determined by growth of the feed flux with the velocity.
- ПубликацияТолько метаданные3-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.
- ПубликацияТолько метаданныеImpact of the vacuum core on the upper limit of the separative power of gas centrifuges(2021) Tronin, I. V.; Bogovalov, S. V.; Borman, V. D.; Tronin, V. N.; Тронин, Иван Владимирович; Боговалов, Сергей Владимирович© 2020 Elsevier LtdAccording to Dirac's equation the upper limit of the separative power of a gas centrifuge grows with rotation velocity V of the rotor as V4. This equation has two significant drawbacks. First, it was obtained assuming zero axial fluxes. Secondly, it does not take into account formation of a vacuum core near the axis of rotation. Its volume grows with the speed of rotation. Separation of isotopes does not occur in the vacuum core. In our work, we propose a new formulation of the problem of finding the upper limit of separative power without assumptions about zero axial flows and taking into account the limitation of the volume involved in the separation processes. According to our results, the upper limit of separative power increases with increasing speed much slower than the Dirac estimate, in proportion to V2.
- ПубликацияТолько метаданныеFast Spontaneous Transport of a Non-wetting Fluid in a Disordered Nanoporous Medium(2021) Borman, V.; Belogorlov, A.; Tronin, I.; Белогорлов, Антон Анатольевич; Тронин, Иван Владимирович© 2021, The Author(s), under exclusive licence to Springer Nature B.V.The experimental study of cooperative fast transport of non-wetting fluid in a disordered nanoporous medium is carried out in this work. New experimental data for simultaneous measurement of fluid flow, filled pore volume and pressure have been obtained. Dependencies of critical pressure and flow on porous particle mass and rapid compression energy have also been established. A new transport mechanism is proposed. The dynamics of fluid transport is represented as a process of evolution of two macroscopic growing modes of transport—spontaneous transport that occurs when new critical pressure of dynamic percolation transition and fluid transport caused by a constant critical pressure under impact compression of nanoporous particles suspension. Following the theory of critical dynamics of multiscale phenomena, a condition for the interaction of modes is proposed. Taking into account this interaction, rapid spontaneous transport is adjusted to the slow impact of impact compression, and the experimental dependencies should be described by the slow mode—impact compression. Such transport occurs simultaneously in two different time scales and is determined by the properties of spontaneous transport. The experimental dependencies are quantitatively described in the kinetic model. Under conditions of filled pores, the response of a fluid transport to impact is characterized by positive feedback.
- ПубликацияТолько метаданныеWave Isotope Separation in Super-Intense Centrifugal Fields(2024) Dzhulya, D. N.; Bogovalov, S. V.; Tronin, I. V.; Джуля, Денис Николаевич; Боговалов, Сергей Владимирович; Тронин, Иван Владимирович
- ПубликацияТолько метаданныеThree-dimensional modeling of the flow around the gas scoop under optimal working regime of the Iguassu gas centrifuge at the hyper fast rotation(2022) Bogovalov, S. V.; Borman, V. D.; Vasilyev, A. V.; Tronin, I. V.; Tronin, V. N.; Боговалов, Сергей Владимирович; Васильев, Александр Владиславович; Тронин, Иван Владимирович© 2022 Institute of Physics Publishing. All rights reserved.The problem of the gas withdrawal from an Iguassu gas centrifuge (GC) at the speed of rotation, over 1000 m/s is considered. We focus our attention on the problem of achieving of optimal waste flow and friction power of the gas scoop simultaneously. Calculations were carried out in a three-dimensional approximation for supersonic flow of UF6 around a stationary gas scoop taken as a Pitot tube with a diameter of 2 mm. Attempts to achieve the optimal working regime of GC for the selected particular gas scoop were not successful. On the basis of this results we conclude that the optimal gas withdrawal and creation of the optimal axial circulation can be problematic for the hyper-speed gas centrifuges.
- ПубликацияТолько метаданныеSimulation 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.
- ПубликацияОткрытый доступWaves in gas centrifuges: A review(2020) Bogovalov, S. V.; Kislov, V. A.; Tronin, I. V.; Боговалов, Сергей Владимирович; Кислов, Владимир Александрович; Тронин, Иван Владимирович© 2020 Published under licence by IOP Publishing Ltd.Waves in gas centrifuges are generated by scoops for withdrawal of the gas. The physics of the waves and their role in the gas dynamics are under discussion. Strong centrifugal and Coriolis forces have dramatic impact on the properties and dispersion relation of the waves. The conventional sound, vertex and entropy waves split into 3 families with different dispersion. The entropy wave has zero velocity of propagation but variation of temperature in this wave is accompanied by toroidal motion. Pressure is not perturbed. The rest two families of the waves have nonzero velocities of propagation. Upper family has frequency above doubled frequency of rotation of the rotor with exceptional case of the wave (named acoustic wave) propagating exactly in the axial direction. This wave propagates with the conventional sound velocity and is polarized only in the axial direction. Unique property of this wave is the weakest damping due to the molecular viscosity and heat conductivity. All other waves are damped on distances compared with their wavelength. At the conventional parameters of the IGUASU centrifuge the acoustic waves are damped predominantly due to the viscous interaction and heat exchange with the wall of the rotor. This wave is able to propagate on the distance of ≤ 1 m. Numerical experiments show that the waves can affect the axial circulation and gas content in the centrifuge and produce phenomena of resonances. Possible impact of the waves on the process of separation of the isotopes is also under discussion.