Burgers velocity fields and dynamical transport processes

TL;DR

This paper investigates the relationship between Burgers velocity fields and diffusive transport processes, establishing conditions under which passive contaminant dispersion can be modeled as a Markovian diffusion within Burgers flows.

Contribution

It provides a comprehensive characterization of diffusive matter transport governed by Burgers velocity fields, extending to incompressible and infinitely compressible media.

Findings

Derived conditions for interpreting Burgers flow as a diffusion process

Characterized diffusive transport in compressible and incompressible flows

Extended the framework to a broad class of media

Abstract

We explore a connection of the forced Burgers equation with the Schr\"{o}dinger (diffusive) interpolating dynamics in the presence of deterministic external forces. This entails an exploration of the consistency conditions that allow to interpret dispersion of passive contaminants in the Burgers flow as a Markovian diffusion process. In general, the usage of a continuity equation $\partial_t\rho =-\nabla (\vec{v}\rho)$, where $\vec{v}=\vec{v}(\vec{x},t)$ stands for the Burgers field and $\rho $ is the density of transported matter, is at variance with the explicit diffusion scenario. Under these circumstances, we give a complete characterisation of the diffusive matter transport that is governed by Burgers velocity fields. The result extends both to the approximate description of the transport driven by an incompressible fluid and to motions in an infinitely compressible medium.