Skip to Main content Skip to Navigation
Journal articles

Buoyant-thermocapillary instabilities in extended liquid layers subjected to a horizontal temperature gradient

J. Burguete 1, 2 N. Mukolobwiez 2 F. Daviaud 3, 2 N. Garnier 2 A. Chiffaudel 2 
3 SPHYNX - Systèmes Physiques Hors-équilibre, hYdrodynamique, éNergie et compleXes
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
Abstract : We report experiments on buoyant-thermocapillary instabilities in differentially heated liquid layers. The results are obtained for a fluid of Prandtl number 10 in a rectangular geometry with different aspect ratios. Depending on the height of liquid and on the aspect ratios, the two-dimensional basic flow destabilizes into oblique traveling waves or longitudinal stationary rolls, respectively, for small and large fluid heights. Temperature measurements and space–time recordings reveal the waves to correspond to the hydrothermal waves predicted by the linear stability analysis of Smith and Davis ͓J. Fluid Mech. 132, 119 ͑1983͔͒. Moreover, the transition between traveling and stationary modes agrees with the work by Mercier and Normand ͓Phys. Fluids 8, 1433 ͑1996͔͒ even if the exact characteristics of longitudinal rolls differ from theoretical predictions. A discussion about the relevant nondimensional parameters is included. In the stability domain of the waves, two types of sources have been evidenced. For larger heights, the source is a line and generally evolves towards one end of the container leaving a single wave whereas for smaller heights, the source looks like a point and emits a circular wave which becomes almost planar farther from the source in both directions.
Document type :
Journal articles
Complete list of metadata

Cited literature [42 references]  Display  Hide  Download
Contributor : Dominique GIRARD Connect in order to contact the contributor
Submitted on : Thursday, September 29, 2016 - 12:24:54 PM
Last modification on : Thursday, March 10, 2022 - 3:58:07 PM
Long-term archiving on: : Friday, December 30, 2016 - 1:15:10 PM


Files produced by the author(s)




J. Burguete, N. Mukolobwiez, F. Daviaud, N. Garnier, A. Chiffaudel. Buoyant-thermocapillary instabilities in extended liquid layers subjected to a horizontal temperature gradient. Physics of Fluids, American Institute of Physics, 2001, 13, pp.2773-2787. ⟨10.1063/1.1398536͔⟩. ⟨cea-01373880⟩



Record views


Files downloads