Abstract
We propose a mathematical model for the propagation of nonlinear long waves in a two-layer shear flow of an inhomogeneous fluid with free boundary taking into account the dispersion and mixing effects. The equations of fluid motion are presented in the form of a hyperbolic system of first-order quasilinear equations. Solutions are constructed in the class of traveling waves that describe damped oscillations of the internal interface. The two-layer flow parameters for which large-amplitude waves can form are found. Unsteady flows that arise when flowing around a local obstacle are numerically modelled. It is shown that, depending on the oncoming flow velocity and the obstacle shape, disturbances propagate upstream in the form of a monotonous or undular bore.
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ACKNOWLEDGMENTS
The author expresses her gratitude to A.A. Chesnokov for his interest in this work.
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Translated by V. Potapchouck
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Ermishina, V.E. A Hyperbolic Model of Strongly Nonlinear Waves in Two-Layer Flows of an Inhomogeneous Fluid. J. Appl. Ind. Math. 16, 659–671 (2022). https://doi.org/10.1134/S199047892204007X
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DOI: https://doi.org/10.1134/S199047892204007X