Statistics of particle concentration in free-surface turbulence

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Particles on the surface of an incompressible fluid maintained in a turbulent steady-state cluster into spatio-temporally complex flow structures. We experimentally study the statistics of particle concentration n(r, t) over various coarse-grained scales r' in the inertial range. Another control parameter is the Taylor Microscale Reynolds number Re{sub {lambda}}. The focus is on the steady state probability density function {Pi}(n{sub r}). Attention is also given to the variance {sigma}{sup 2}(r, t) of this PDF, since it yields information about the topology of the coagulated structures. Where possible, the results are compared and contrasted with those obtained in a recent analytical ... continued below

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Bandi, Mahesh M; Larkin, J & Goldburg, W January 1, 2009.

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Particles on the surface of an incompressible fluid maintained in a turbulent steady-state cluster into spatio-temporally complex flow structures. We experimentally study the statistics of particle concentration n(r, t) over various coarse-grained scales r' in the inertial range. Another control parameter is the Taylor Microscale Reynolds number Re{sub {lambda}}. The focus is on the steady state probability density function {Pi}(n{sub r}). Attention is also given to the variance {sigma}{sup 2}(r, t) of this PDF, since it yields information about the topology of the coagulated structures. Where possible, the results are compared and contrasted with those obtained in a recent analytical and numerical study of two-dimensional synthetic turbulence by Ducasse and Pumir. There, but not here, the dimensionless compressibility C is an important control parameter.

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  • Journal Name: Pjys. Rev E

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  • Report No.: LA-UR-09-00423
  • Report No.: LA-UR-09-423
  • Grant Number: AC52-06NA25396
  • Office of Scientific & Technical Information Report Number: 956549
  • Archival Resource Key: ark:/67531/metadc926791

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  • January 1, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 5:07 p.m.

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Bandi, Mahesh M; Larkin, J & Goldburg, W. Statistics of particle concentration in free-surface turbulence, article, January 1, 2009; [New Mexico]. (digital.library.unt.edu/ark:/67531/metadc926791/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.