"Clusterization" and intermittency of temperature fluctuations in turbulent convection

A. Bershadskii, J. J. Niemela, A. Praskovsky, K. R. Sreenivasan

Research output: Contribution to journalArticle

Abstract

The clusterization and amplitude intermittency of temperature fluctuations in turbulent convection were investigated. The temperature time traces were obtained in turbulent thermal convection at high Rayleigh numbers. A telegraph approximation for temperature traces were generated by setting the fluctuation amplitudes to 1 or 0, which allowed to distinguish the tendency of events to cluster from their large-scale variability in amplitude. The telegraphic approximation is useful because of the specific process of heat transfer, which was determined in large measures by the random motion of temperature plumes.

Original languageEnglish (US)
Article number056314
JournalPhysical Review E
Volume69
Issue number5 1
StatePublished - May 2004

Fingerprint

Intermittency
intermittency
Convection
convection
Fluctuations
Trace
Thermal Convection
temperature
Rayleigh number
Approximation
approximation
free convection
plumes
Heat Transfer
tendencies
heat transfer
Motion

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Mathematical Physics

Cite this

"Clusterization" and intermittency of temperature fluctuations in turbulent convection. / Bershadskii, A.; Niemela, J. J.; Praskovsky, A.; Sreenivasan, K. R.

In: Physical Review E, Vol. 69, No. 5 1, 056314, 05.2004.

Research output: Contribution to journalArticle

Bershadskii, A. ; Niemela, J. J. ; Praskovsky, A. ; Sreenivasan, K. R. / "Clusterization" and intermittency of temperature fluctuations in turbulent convection. In: Physical Review E. 2004 ; Vol. 69, No. 5 1.
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