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Nonlinear Marangoni convection in bounded layers. Part 1. Circular cylindrical containers

Published online by Cambridge University Press:  20 April 2006

S. Rosenblat ,
S. H. Davis  and
G. M. Homsy
S. Rosenblat
Affiliation:
SHD Associates, Inc., 2735 Simpson St, Evanston, IL 60201, U.S.A.
S. H. Davis
Affiliation:
SHD Associates, Inc., 2735 Simpson St, Evanston, IL 60201, U.S.A.
G. M. Homsy
Affiliation:
SHD Associates, Inc., 2735 Simpson St, Evanston, IL 60201, U.S.A.
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Abstract

We consider liquid in a circular cylinder that undergoes nonlinear Marangoni insta- bility. The upper free surface of the liquid is taken to have large-enough surface tension that surface deflections are neglected. The side walls are adiabatic and impenetrable, and for mathematical simplicity the liquid is allowed to slip on the side walls. The linearized stability theory for heating from below gives the critical Marangoni number Mc as a function of cylinder dimensions, surface-cooling condition and Rayleigh number. The steady nonlinear convective states near Mc are calculated using an asymptotic theory, and the stability of these states is examined. At simple eigenvalues Mc the finite-amplitude states are determined. We find th at the Prandtl number of the liquid influences the stability of axisymmetric states, distinguishing upflow at the centre from downflow. Near those aspect ratios corresponding to double eigenvalues Me, where two convective states of linear theory are equally likely, the nonlinear theory predicts sequences of transitions from one steady convective state to another as the Marangoni number is increased. These transitions are determined and discussed in detail. Time-periodic convection is possible in certain cases.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 120 , July 1982 , pp. 91 - 122
Copyright
© 1982 Cambridge University Press

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