Microbubbles and Microparticles are Not Faithful Tracers of Turbulent Acceleration

Mathai, Varghese; Calzavarini, Enrico; Brons, Jon; Sun, Chao; Lohse, Detlef

doi:10.1103/physrevlett.117.024501

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Microbubbles and Microparticles are Not Faithful Tracers of Turbulent Acceleration

Published in Physical Review Letters • Jul 8, 2016

Authors:

Varghese Mathai

Enrico Calzavarini

Jon Brons

Abstract

We report on the Lagrangian statistics of acceleration of small (sub-Kolmogorov) bubbles and tracer particles with Stokes number St≪1 in turbulent flow. At a decreasing Reynolds number, the bubble accelerations show deviations from that of tracer particles; i.e., they deviate from the Heisenberg-Yag...

Subject

Turbulence

Intermittency

Froude number

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