Scaling of acceleration in locally isotropic turbulence

Preprint

24 November 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.physics/0111171

Abstract

The variances of the fluid-particle acceleration and of the pressure-gradient and viscous force are given. The scaling parameters for these variances are velocity statistics measureable with a single-wire anemometer. For both high and low Reynolds numbers, asymptotic scaling formulas are given; these agree quantitatively with DNS data. Thus, the scaling can be presumed known for all Reynolds numbers. Fluid-particle acceleration variance does not obey K41 scaling at any Reynolds number; this is consistent with recent experimental data. The non-dimensional pressure-gradient variance named lambda-sub{T} /lambda-sub{P} is shown to be obsolete.

Keywords

PARTICLE ACCELERATION
ISOTROPIC TURBULENCE
SCALING PARAMETERS
LOCALLY ISOTROPIC
REYNOLDS NUMBERS
FLUID PARTICLE
TURBULENCE
VARIANCES

All Related Versions

Version 1, 2001-11-24, ArXiv

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