# Single-particle dispersion in stably stratified turbulence

## TL;DR

This paper develops models for single-particle dispersion in stratified turbulence, capturing vertical and horizontal behaviors, and validates them against numerical simulations, highlighting differences from isotropic turbulence.

## Contribution

The paper introduces new models for vertical and horizontal dispersion in stratified flows, incorporating observed spectra and wind effects, improving understanding of particle transport.

## Key findings

- Models agree well with numerical simulations
- Vertical dispersion based on Lagrangian vertical velocity spectrum
- Horizontal dispersion includes wind contributions

## 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.