Single-particle dispersion in stably stratified turbulence

Abstract

We present models for single-particle dispersion in vertical and horizontal directions of stably stratified flows. The model in the vertical direction is based on the observed Lagrangian spectrum of the vertical velocity, while the model in the horizontal direction is a combination of a continuous-time eddy-constrained random walk process with a contribution to transport from horizontal winds. Transport at times larger than the Lagrangian turnover time is not universal and dependent on these winds. The models yield results in good agreement with direct numerical simulations of stratified turbulence, for which single-particle dispersion differs from the well studied case of homogeneous and isotropic turbulence.

References in corpus (5)

• Coherent structures and extreme events in rotating multiphase turbulent flows
• Evidence for Bolgiano-Obukhov scaling in rotating stratified turbulence using high-resolution direct numerical simulations
• Large-scale anisotropy in stably stratified rotating flows
• Turbulent pair dispersion as a continuous-time random walk
• Absorption of waves by large scale winds in stratified turbulence

Cited by in corpus (4)

• Single-particle Lagrangian statistics from direct numerical simulations of rotating-stratified turbulence
• Velocity and acceleration statistics in particle-laden turbulent swirling flows
• Statistics of single and multiple floaters in experiments of surface wave turbulence
• Vertical dispersion of Lagrangian tracers in fully developed stably stratified turbulence