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EN The wave model of secondary flows and coherent structures in pipes
Holodilʹnaâ Tehnika i Tehnologiâ, 2020 In this article, a theoretical analysis of the flows arising in the cross sections of fluid and gas flows is performed. Such flows are subdivided into secondary flows and coherent structures. From experimental studies it is known that both types of flows
S. Surkov
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AIP Advances, 2022 In this paper, the use of boundary-layer coordinates to compute various unsteady laminar two-dimensional viscous flows is discussed. Three illustrative examples are provided, including flow around a corner, free convective flow from a heated corner, and ...
S. J. D. D’Alessio
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Closed vortex lines in fluid and gas
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2019 Continuous fluid and gas flows with closed vortex tubes are investigated. The circulation along the vortex line of the ratio of the density of the resultant of all forces (applied to the fluid or gas) to the density of the fluid or gas is considered.
Grigory Borisovich Sizykh
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Hydrodynamic structure of laminar flows with oppositely-swirled coaxial layers [PDF]
MATEC Web of Conferences, 2019 The article is devoted to the theoretical study of hydrodynamics of laminar flows with coaxial layers swirled in opposite directions and moving along the pipe. Such flows in a turbulent range have a wide practical application potential in technologies of
Zuikov Andrey, Orekhov Genrikh
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New Lagrangian view of vorticity evolution in two-dimensional flows of liquid and gas [PDF]
Известия высших учебных заведений: Прикладная нелинейная динамика, 2022 Purpose of the study is to obtain formulas for such a speed of imaginary particles that the circulation of the speed of a (real) fluid along any circuit consisting of these imaginary particles changes (in the process of motion of imaginary particles ...
Sizykh, Grigory B.
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Numerical Simulation and Linearized Theory of Vortex Waves in a Viscoelastic, Polymeric Fluid
Fluids, 2021 In a high viscosity, polymeric fluid initially at rest, the release of elastic energy produces vorticity in the form of coherent motions (vortex rings).
Robert A. Handler, Michael J. Buckingham
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Calculation of the force on solid body in the unsteady flow of incompressible fluid
Archives of Mechanics, 2010 In the paper, a special method to compute the aerodynamic force is presented. This method is especially addressed to the calculation while both the velocity and vorticity fields are found as a result of the vortex method application.
M. Poćwierz, A. Styczek
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Numerical Investigation of the Secondary Swirling in Supersonic Flows of Various Nature Gases
Energies, 2021 Despite the application of vortex tubes for cooling, separating gas mixtures, vacuuming, etc., the mechanism of energy separation in vortex tubes remains an object of discussion.
Vyacheslav Volov +2 more
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Engineering Applications of Computational Fluid Mechanics, 2021 Vortex is the dominant flow structure in hydro-energy machinery, and its swirling features are mainly determined by the rigid rotation part of vorticity.
Chaoyue Wang +3 more
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Vortex methods for slightly viscous three dimensional flow [PDF]
SIAM Journal on Scientific and Statistical Computing, 1990 Vortex methods for slightly viscous three-dimensional flow are presented. Vortex methods have been used extensively for two-dimensional problems, though their most efficient extension to three-dimensional problems is still under investigation. A method that evaluates the vorticity by exactly differentiating an approximate velocity field is applied ...
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