Lagrangian views on turbulent mixing of passive scalars

TL;DR

This paper reviews recent advances in the Lagrangian perspective on passive scalar turbulence, including theoretical, experimental, and simulation approaches, with implications for understanding scalar mixing in Navier-Stokes turbulence.

Contribution

It provides a comprehensive overview of recent developments in Lagrangian turbulence research, highlighting connections to the Kraichnan model and potential insights into scalar mixing.

Findings

Insights into the Kraichnan model for passive scalar advection

Implications for scalar mixing in Navier-Stokes turbulence

Review of recent experimental and simulation results

Abstract

The Lagrangian view of passive scalar turbulence has recently produced interesting results and interpretations. Innovations in theory, experiments, simulations and data analysis of Lagrangian turbulence are reviewed here in brief. Part of the review is closely related to the so-called Kraichnan model for the advection of the passive scalar in synthetic turbulence. Possible implications for a better understanding of the passive scalar mixing in Navier-Stokes turbulence are also discussed.