Burgers velocity fields and dynamical transport processes

Details Burgers velocity fields and dynamical transport processes Burgers velocity fields and dynamical transport processes

1998-02-05

arxiv.org/abs/cond-mat/9802060v1

Phys. Rev. Lett. 77, 2608-2611, (1996)

Physics

Condensed Matter

Latex file

Scientific paper

10.1103/PhysRevLett.77.2608

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.

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