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Scaling of acceleration in locally isotropic turbulence | | Reginald J. Hill
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24 Nov 2001 | | Subject: | Fluid Dynamics | physics.flu-dyn | | 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. | | Source: | arXiv, physics/0111171 | | Services: | Forum | Review | PDF | Favorites | |
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