Grid generated turbulence in helium II

J. J. Niemela; K. R. Sreenivasan; R. J. Donnelly

doi:10.1007/s10909-005-2253-8

Grid generated turbulence in helium II

J. J. Niemela, K. R. Sreenivasan, R. J. Donnelly

Research output: Contribution to journal › Article › peer-review

Abstract

We present experimental data on decaying turbulence generated by towing a grid of crossed tines through a stationary sample of He II. The present data were obtained using a grid of substantially improved design from that used in previous investigations of grid generated superfluid turbulence. An important preliminary observation is that both the magnitude and temperature dependence of the effective kinematic viscosity of the turbulence - deduced from measurements of the attenuation of second sound as a function of time - are not substantially altered by details of the grid used to generate the turbulent flow.

Original language	English (US)
Pages (from-to)	537-542
Number of pages	6
Journal	Journal of Low Temperature Physics
Volume	138
Issue number	3-4
DOIs	https://doi.org/10.1007/s10909-005-2253-8
State	Published - Feb 2005

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

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abstract = "We present experimental data on decaying turbulence generated by towing a grid of crossed tines through a stationary sample of He II. The present data were obtained using a grid of substantially improved design from that used in previous investigations of grid generated superfluid turbulence. An important preliminary observation is that both the magnitude and temperature dependence of the effective kinematic viscosity of the turbulence - deduced from measurements of the attenuation of second sound as a function of time - are not substantially altered by details of the grid used to generate the turbulent flow.",

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AU - Sreenivasan, K. R.

AU - Donnelly, R. J.

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AB - We present experimental data on decaying turbulence generated by towing a grid of crossed tines through a stationary sample of He II. The present data were obtained using a grid of substantially improved design from that used in previous investigations of grid generated superfluid turbulence. An important preliminary observation is that both the magnitude and temperature dependence of the effective kinematic viscosity of the turbulence - deduced from measurements of the attenuation of second sound as a function of time - are not substantially altered by details of the grid used to generate the turbulent flow.

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ER -

Grid generated turbulence in helium II

Abstract

ASJC Scopus subject areas

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