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This article is cited in 1 scientific paper (total in 1 paper)
A new class of exact solutions in the planar nonstationary problem of motion of a fluid with a free boundary
E. N. Zhuravlevaab, N. M. Zubarevcd, O. V. Zubarevac, E. A. Karabutab a Lavrentiev Institute for Hydrodynamics, Siberian Branch of
RAS, Novosibirsk, Russia
b Novosibirsk State University, Novosibirsk, Russia
c Institute for Electrophysics, Ural Branch of RAS,
Yekaterinburg, Russia
d Lebedev Physical Institute, RAS, Moscow, Russia
Abstract:
We consider the classical problem of potential unsteady flow of an ideal incompressible fluid with a free boundary. It was previously discovered that in the absence of external forces and capillarity, a wide class of exact solutions of the problem can be described by the Hopf equation for a complex velocity. We here obtain a new class of solutions described by the Hopf equation for a quantity that is the inverse of the complex velocity. These solutions describe the evolution of two-dimensional perturbations of the free boundary in compression or expansion of a circular cavity (in the unperturbed state) in the fluid.
Keywords:
ideal incompressible fluid, unsteady planar flow with a free boundary, exact solution, complex velocity, Hopf equation.
Received: 26.07.2019 Revised: 26.07.2019
Citation:
E. N. Zhuravleva, N. M. Zubarev, O. V. Zubareva, E. A. Karabut, “A new class of exact solutions in the planar nonstationary problem of motion of a fluid with a free boundary”, TMF, 202:3 (2020), 393–402; Theoret. and Math. Phys., 202:3 (2020), 344–351
Linking options:
https://www.mathnet.ru/eng/tmf9783https://doi.org/10.4213/tmf9783 https://www.mathnet.ru/eng/tmf/v202/i3/p393
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