Filtering of Singularities in a Marangoni Convection Problem

Henar Herrero (), Ana M. Mancho () and Sergio Hoyas ()
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Henar Herrero: Universidad de Castilla-La Mancha, Departamento de Matemáticas, Facultad de Ciencias Químicas
Ana M. Mancho: CSIC, Instituto de Matemáticas y Física Fundamental
Sergio Hoyas: Universidad Politécnica de Madrid

A chapter in Numerical Mathematics and Advanced Applications, 2006, pp 889-896 from Springer

Abstract: Abstract The problem considered consists of a fluid within a cylindrical annulus heated laterally. As soon as a horizontal temperature gradient is applied a convective state appears. This state becomes unstable through stationary or oscillatory bifurcations as control parameters involved in the problem reach critical values. The problem is modelled with the incompressible Boussinesq Navier-Stokes equations and appropriate boundary conditions. In particular we consider lateral conducting walls and surface tension effects. This choice presents singularities at the point where free and solid surfaces meet, which consist on discontinuities on the temperature and its derivatives. These singularities are smoothed using a polynomial filtering. The main goal of this work is the study of the effect of this filtering in the stability problem. The filter improves the convergence of the numerical method. Convergence with the filtering scale depends on the Marangoni parameter.

Keywords: Rayleigh Number; Biot Number; Marangoni Number; Order Expansion; Thermocapillary Convection (search for similar items in EconPapers)
Date: 2006
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-540-34288-5_88

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DOI: 10.1007/978-3-540-34288-5_88

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