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Борисевич, Валентин Дмитриевич

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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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Борисевич

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Валентин Дмитриевич

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Только метаданные
Three-Dimensional Flows in a Rotating Cylinder in the Presence of Turbulent Boundary Layers on End Disks
(2019) Borisevich, V. D.; Potanin, E. P.; Борисевич, Валентин Дмитриевич
© 2019, Pleiades Publishing, Ltd.An analytical model for calculating a viscous incompressible fluid flow in a rotating cylinder with a braking lid and the formation of turbulent boundary layers on the end surfaces is presented. The analysis is made with account for all nonlinear inertial terms in the equations of motion, within the framework of Loitsyanskii's integral relations. The approximate velocity profiles in the boundary layers are preassigned in accordance with the empirical 1/7 law. The main flow is subdivided into an inviscid quasisolid core and a lateral layer, where almost the entire upward part of a circulatory flow is concentrated. The unknown angular velocity of the core and its radial boundary are evaluated from the balance between the moments of the friction forces acting on the main rotating flow and the continuity condition for the circulatory flow.
Только метаданные
Thermally driven countercurrent plasma centrifuge
(2021) Whichello, J. V.; Borisevich, V. D.; Potanin, E. P.; Борисевич, Валентин Дмитриевич
© 2020 Taylor & Francis.Renewed interest in plasma isotope separation stems from the need to produce certain isotopes more inexpensively. These include isotopes of groups I and II, rare earth and some other elements of the periodic table. While gas centrifuge cascades, developed for uranium enrichment, are capable of a wider range of separation applications, they are limited to elements that can form volatile gaseous compounds at room temperature. In the absence of a suitable compound, more expensive separation techniques are used, consuming considerable electrical power for relatively low throughputs. We believe that a new type of plasma centrifuge can be a viable alternative.
Только метаданные
Classification of model cascades for separation of multicomponent isotope mixtures
(2021) Zeng, S.; Jiang, D.; Sulaberidze, G. A.; Smirnov, A. Y.; Borisevich, V. D.; Сулаберидзе, Георгий Анатольевич; Смирнов, Андрей Юрьевич; Борисевич, Валентин Дмитриевич
© 2020, © 2020 Taylor & Francis.As far as we know, it is the first attempt to build the classification of the currently existing models of molecular-selective mass transfer in cascades for isotope separation in the stationary mode of their operation. In papers devoted to this subject, such cascades are often called as “model” ones. It is shown that for the case of symmetric separation any of such a “model” cascade can be represented as a special case of a cascade with constant separation factors. There are established interrelationships of the “model” cascades, both with each other and with the symmetrical countercurrent cascades feasible in practice.
Только метаданные
Application of the Dorodnitsyn Transformation for Analysis of Heat and Mass Transfer in Rotating Flows
(2021) Borisevich, V. D.; Potanin, E. P.; Борисевич, Валентин Дмитриевич
A method based on the use of the Dorodnitsyn transformation is proposed for calculating the nonisothermal laminar boundary layers on a disk rotating in a gaseous medium. An approximate account for the nonlinear inertial terms is performed by the Slezkin-Targ method. It is demonstrated that, upon cooling the surface of the disk-end rotating slower than the external flow, it is possible not only to weaken the radial flow of a viscous heat-conducting gas, but also to change the direction of the flow velocity in the boundary layer to the opposite one. The possibilities of using the results to reduce the masking effect of the end elements in the experimental study of the stability of rotational flows as well as to control the circulation flows in closed systems are discussed.
Только метаданные
Influence of Radial Change in Gas Density on Nonlinear Hydrodynamic Effects in Its Flow Over a Rotating Disk
(2022) Potanin, E. P.; Borisevich, V. D.; Борисевич, Валентин Дмитриевич
© 2022, Springer Science+Business Media, LLC, part of Springer Nature.A laminar boundary layer in a gas flow near a disk rotating at a constant angular velocity under the conditions of a significant radial redistribution of the gas density is investigated. The analysis is performed on the basis of a self-similar transformation for the gas density varying according to a power law in the radial direction. Calculation of the boundary layer characteristics in the gas flow was made by the Slezkin–Targ method. The dependence of the resistance forces acting on the disk on the gas compressibility is investigated. It is shown that an increase in the radial gradient of the gas density leads to a noticeable increase in azimuthal friction forces in the boundary layer near the disk. The results obtained for an extended disk are used to estimate the intensity of the circulation flow in a rotating cylinder of finite dimensions at a small ratio of the height of the cylinder to its radius. As follows from the calculation results, an increase in the gas compressibility parameter leads to an increase in its circulation rate.
Только метаданные
Solution of the simplified fluid dynamic equation for transient processes in a gas centrifuge
(2022) Zeng, S.; Borisevich, V. D.; Smirnov, A. Yu.; Sulaberidze, G. A.; Борисевич, Валентин Дмитриевич; Смирнов, Андрей Юрьевич; Сулаберидзе, Георгий Анатольевич
© 2022 Institute of Physics Publishing. All rights reserved.The equation describing a transient process in a gas centrifuge is a partial differential equation and has to be solved by using a numerical method. The Crank-Nicolson scheme and a central difference scheme are employed, respectively, for time discretization and space discretization. Under the condition of full circulation flow, the solution of the equation coincides with the result of the linear theory, verifying the correctness of numerical solution. The transient processes of a centrifuge are simulated with two withdrawal models to reveal the variations of the axial velocity with time in the processes. The results shows that for a given rotor peripheral speed, the radial distribution of the axial velocity depends mainly on the wall pressure and the withdrawal strength, but the influence of the withdrawals is much weaker than the wall pressure. The results also demonstrate that the partial differential equations describing the fluid dynamics in a transient process does exhibit the dynamic variations, and can be further applied to the analysis of separation performance.
Только метаданные
Magnetohydrodynamics and Heat Transfer in Rotating Flows
(2019) Borisevich, V. D.; Potanin, E. P.; Борисевич, Валентин Дмитриевич
© 2019, Springer Science+Business Media, LLC, part of Springer Nature. The motion of a viscous conducting medium caused by the rotation of an extended dielectric disk in an axial magnetic field in the presence of an axial temperature gradient is considered. For the case of a strong magnetic field, the values of the Nusselt number on the disk surface are estimated. A comparison of the obtained results with the well-known data of numerical calculation is made. Based on the calculated profile of the azimuthal velocity of the medium in the boundary layer on the disk, the motion of liquid is investigated in the space between two dielectric disks rotating in the same direction with different angular velocities in the presence of suction and blowing through their solid porous surfaces. The results of calculation of the angular rotational velocities of an inviscid core depending on the suction and magnetic field parameters are given.
Только метаданные
Gas-Dynamic Processes in a Rotating Cylinder in the Presence of Axial Temperature Gradients
(2023) Borisevich, V. D.; Potanin, E. P.; Борисевич, Валентин Дмитриевич
Только метаданные
Development of schemes from a single cascade to multi-cascades for separation of regenerated uranium
(2023) Zeng, S.; Smirnov, A. Yu.; Borisevich, V. D.; Sulaberidze, G. A.; Gusev, V. E.; Смирнов, Андрей Юрьевич; Борисевич, Валентин Дмитриевич; Сулаберидзе, Георгий Анатольевич; Гусев, Владислав Евгеньевич
Только метаданные
Large-scale production by centrifugation of isotopically modified molybdenum for nuclear reactors and its cost evaluation
(2021) Zeng, S.; Zhao, K.; Jiang, D. J.; Borisevich, V. D.; Smirnov, A. Y.; Sulaberidze, G. A.; Борисевич, Валентин Дмитриевич; Смирнов, Андрей Юрьевич; Сулаберидзе, Георгий Анатольевич
© 2021 Elsevier LtdMolybdenum is considered as one of the substitutes for zirconium in making fuel cladding for safe reactor designs. The isotopically modified molybdenum (IMM) should be used instead of natural molybdenum to achieve higher energy efficiency, reduce uranium consumption, and mitigate the impact on the nuclear fuel cycle. This task can be fulfilled by using the same technology of gas centrifugation for uranium enrichment to remove the isotopes in natural molybdenum with larger thermal neutron absorption cross sections. Optimized double-cascade separation schemes consisting of the Q-cascade model are employed for studying massive production of IMM and evaluating the economic feasibility of production. A simple formula is derived to be able to assess the cost per kilogram of IMM, taking into account various cost-affecting factors. The results demonstrate that it is feasible to produce massively the IMM with a total thermal neutron absorption cross section equivalent to that of zirconium.