On the motion of gravity-capillary waves with odd viscosity

TL;DR

This paper introduces three new asymptotic models for gravity-capillary waves in fluids with odd viscosity, capturing complex interactions and providing well-posedness proofs and numerical simulations.

Contribution

It develops novel asymptotic wave models incorporating odd viscosity effects, including bidirectional and unidirectional cases, with rigorous mathematical analysis.

Findings

Models accurately describe wave behavior with odd viscosity effects.

Well-posedness established in analytic and Sobolev spaces.

Numerical simulations demonstrate model validity.

Abstract

We develop three asymptotic models of surface waves in a non-newtonian fluid with odd viscosity. This viscosity is also known as Hall viscosity and appears in a number of applications such as quantum Hall fluids or chiral active fluids. Besides the odd viscosity effects, these models capture both gravity and capillary forces up to quadratic interactions and take the form of nonlinear and nonlocal wave equations. Two of these models describe bidirectional waves while the third PDE studies the case of unidirectional propagation. We also prove the well-posedness of these asymptotic models in spaces of analytic functions and in Sobolev spaces. Finally, we present a number of numerical simulations for the unidirectional model.