The three-dimensional state of stratified shear instability in cold water

被引：0

作者：

Stastna, M. ^{[1
]}

Bhavsar, K. ^{[1
]}

Hartharn-Evans, S. ^{[2
]}

Castro-Folker, N. ^{[1
]}

机构：

[1] Univ Waterloo, Dept Appl Math, Waterloo, ON, Canada

[2] Northumbria Univ, Dept Geog & Environm Sci, Newcastle Upon Tyne, England

来源：

PHYSICS OF FLUIDS | 2025年 / 37卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

MIXING EFFICIENCY; PRANDTL NUMBER; TRANSITION; TURBULENCE; EVOLUTION;

D O I：

10.1063/5.0268302

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Stratified shear instability is one of the most widely studied routes to turbulence that occurs in natural waters. We report on simulations in the cold water regime relevant to late winter/early spring lakes, which is characterized by very small density differences and a nonlinear equation of state. The stratified shear instability in this regime achieves a three-dimensional state but it is not a priori clear that a substantial inertial subrange exists. We quantify the manner in which the three-dimensional state dissipates momentum and mixes scalars, and report on the nature of coherent structures in the flow with a focus on late times.

引用

页数：11

共 31 条

[1] Simulations of buoyant flows driven by variations in solar radiation beneath ice cover [J].