- Issue
- Journal of Siberian Federal University. Mathematics & Physics. 2021 14 (4)
- Authors
- Andreev, Victor K.; Sobachkina, Natalya L.
- Contact information
- Andreev, Victor K.: Institute of Computational Modelling SB RAS Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; ; Sobachkina, Natalya L.: Siberian Federal University Krasnoyarsk, Russian Federation; OCRID: 0000-0002-2025-1785
- Keywords
- binary mixture; interface; internal energy; inverse problem; pressure gradient; thermal Marangoni number
- Abstract
The problem of two-dimensional stationary flow of two immiscible incompressible binary mixtures in a cylindrical capillary in the absence of mass forces is investigated. The mixtures are contacted through a common the interface on which the total energy condition is taken into account. The temperature and concentration in the mixtures are distributed according to a quadratic law, which is in good agreement with the velocity field of the type Hiemenz. The resulting conjugate boundary value problem is nonlinear and inverse with respect to the pressure gradients along the axis of the cylindrical capillary. The tau-method (a modification of the Galerkin method) was applied to this problem, which showed the possibility of the existence of two solutions. It is shown that the obtained solutions with a decrease in the Marangoni number converge to the solutions of the problem of the creeping flow of binary mixtures. When solving the model problem for small Marangoni numbers, it is found that the effect of the increments of the internal energy of the interfacial surface significantly affects the dynamics of flows of mixtures in layers
- Pages
- 507–518
- DOI
- 10.17516/1997-1397-2021-14-4-507-518
- Paper at repository of SibFU
- https://elib.sfu-kras.ru/handle/2311/141720
Journal of Siberian Federal University. Mathematics & Physics / Two-layer Stationary Flow in a Cylindrical Capillary Taking into Account Changes in the Internal Energy of the Interface
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