Turbulent convection with time-dependent forcing

J. J. Niemela, K. R. Sreenivasan

Research output: Contribution to journalArticle

Abstract

A new technique is used to explore the structure of turbulent convecting flows. A sinusoidal temperature perturbation is superimposed on the bottom plate of a cylindrical convection cell filled with cryogenic helium gas and its decay is measured at the cell mid-height. The measurements allow the first dynamic estimate of the core part of the flow which conducts fluid effectively without any thermal resistance. The estimate is quantitatively consistent with recent numerical simulations.

Original languageEnglish (US)
Article number032072
JournalJournal of Physics: Conference Series
Volume150
Issue number3
DOIs
StatePublished - 2009

Fingerprint

convection
convection cells
thermal resistance
estimates
turbulent flow
cryogenics
helium
perturbation
fluids
decay
cells
gases
simulation
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Turbulent convection with time-dependent forcing. / Niemela, J. J.; Sreenivasan, K. R.

In: Journal of Physics: Conference Series, Vol. 150, No. 3, 032072, 2009.

Research output: Contribution to journalArticle

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