PREPRINT
4996A5BE-C5CF-4859-B2B3-0DCCF53DDB56

Nonlinear Mixing driven by Internal Gravity Waves

Adam S. Jermyn

Submitted on 17 September 2022

Abstract

Hydrodynamic waves propagate through stellar interiors, transporting energy and angular momentum. They can also advect fluid elements to produce mixing, but this effect has not been quantified from first principles. We derive the leading order non-linear wave mixing due to internal gravity waves in a thermally and compositionally-stratified fluid. We find that this scales as the fourth power of wave velocity, that it is suppressed by compositional stratification, and that it depends on the thermal and compositional diffusivities.

Preprint

Comment: 11 pages, 0 figures

Subjects: Astrophysics - Solar and Stellar Astrophysics; Physics - Fluid Dynamics

URL: https://arxiv.org/abs/2209.08344