Articles | Volume 23, issue 4
https://doi.org/10.5194/npg-23-319-2016
https://doi.org/10.5194/npg-23-319-2016
Research article
 | 
30 Aug 2016
Research article |  | 30 Aug 2016

Intermittent heat instabilities in an air plume

Jean-Louis Le Mouël, Vladimir G. Kossobokov, Frederic Perrier, and Pierre Morat

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Short summary
Heating experiments carried out in a limestone quarry close to Paris have shown a classical shape of temperature distribution in steady-state plumes in averages over 24 h, along with rich dynamics of heat flow with intermittent trains of oscillations, spatially coherent, of large amplitudes and a ~ 400 s period, separated by relative quiescence whose duration can reach several hours. The observed behavior could be a universal feature of some turbulent plumes in real geophysical environments.