Non-linear shallow water dynamics with odd viscosity
| Autor: | Gustavo M. Monteiro, Sriram Ganeshan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Quantum fluid Mesoscopic physics Integrable system Computational Mechanics Fluid Dynamics (physics.flu-dyn) FOS: Physical sciences Electron Pattern Formation and Solitons (nlin.PS) Physics - Fluid Dynamics Condensed Matter - Soft Condensed Matter Nonlinear Sciences - Pattern Formation and Solitons Physics::Fluid Dynamics Gravitation Surface tension Nonlinear system Viscosity Classical mechanics Modeling and Simulation Soft Condensed Matter (cond-mat.soft) |
| Popis: | In this letter, we derive the Korteweg-de Vries (KdV) equation corresponding to the surface dynamics of a shallow depth ($h$) two-dimensional fluid with odd viscosity ($��_o$) subject to gravity ($g$) in the long wavelength weakly nonlinear limit. In the long wavelength limit, the odd viscosity term plays the role of surface tension albeit with opposite signs for the right and left movers. We show that there exists two regimes with a sharp transition point within the applicability of the KdV dynamics, which we refer to as weak $(|��_o|< \sqrt{gh^3}/6)$ and strong $(|��_o|> \sqrt{gh^3}/6)$ parity-breaking regimes. While the `weak' parity breaking regime results in minor qualitative differences in the soliton amplitude and velocity between the right and left movers, the `strong' parity breaking regime on the contrary results in solitons of depression (negative amplitude) in one of the chiral sectors. 6 pages, 4 figures, video abstract: https://www.youtube.com/watch?v=DgFZxyNmllQ&feature=youtu.be |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|