Abstract
We have presented an experiment in which the wavelength selection of parallel rolls pattern is studied for a large range of Rayleigh number. Far from the threshold, the domain of allowed wavenumbers, in our experiment, can be interpreted, to a certain extent, as being a simple distortion of the 2-D rolls linear stability domain /8/. However, when we approach the convection threshold, we must use a selection mechanism which takes into account the sidewalls, in order to interpret our results. Furthermore, our results present, at the vicinity of the threshold, a good quantitative agreement with Cross et al. predictions. The selected domain is reduced in regard to the stability region analysed by Busse and Clever.
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Martinet, B., Haldenwang, P., Labrosse, G., Payan, J.C., Payan, R. (1984). Rayleigh-Benard instability : Experimental study of the wavenumber selection. In: Wesfreid, J.E., Zaleski, S. (eds) Cellular Structures in Instabilities. Lecture Notes in Physics, vol 210. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-13879-X_68
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DOI: https://doi.org/10.1007/3-540-13879-X_68
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