Pattern Selection in the Bénard-Marangoni Instability
A very regular pattern of hexagonal cells may develop as a consequence of a convective instability. BENARD |1| at the beginning of this century observed what are now known as Bénard cells in shallow layers of spermaceti heated from below. Later on, PEARSON |2| proved theoretically that surface tension variations with temperature on a surface in contact with the atmosphere provide a sufficient instability mechanism to sustain convective motions. Usually, under gravity, this mechanism does not act alone: buoyancy forces due to an adverse density gradient provide a second instability mechanism in Bénard-Marangoni (B-M) convection.
KeywordsEntropy Convection Hexa Hexagonal Nite
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