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Thermocapillar and thermogravitatory waves in a convection problem

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Abstract

We study, from a numerical point of view, a thermal convection problem in a cylindrical annulus where a dynamic flow is imposed through a non-zero temperature gradient at the bottom. Experimentally, many interesting dynamical behaviours have been discovered in this system, which are controlled by heat related parameters and buoyant and thermocapillary instability mechanisms. By setting the Marangoni or the Rayleigh numbers equal to zero we explore the origin of different stationary, oscillatory, and codimension two stationary-oscillatory structures and their connection to either thermocapillary or thermogravitatory effects. We find that waves are possible in both cases if heat related parameters are conveniently tuned.

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Correspondence to H. Herrero.

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H.J.S. Fernando

PACS

47.27.Te, 02.60.Cb, 47.20.y

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Hoyas, S., Herrero, H. & Mancho, A. Thermocapillar and thermogravitatory waves in a convection problem. Theor. Comput. Fluid Dyn. 18, 309–321 (2004). https://doi.org/10.1007/s00162-004-0143-3

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  • DOI: https://doi.org/10.1007/s00162-004-0143-3

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