RAYLEIGH-BÉNARD CONVECTION INSTABILITY IN THE PRESENCE OF TEMPERATURE VARIATION AT THE LOWER WALL

Abstract

This paper analyzes the two-dimensional viscous fluid flow between two parallel lates, where the lower plate is heated and the upper one is cooled. The emperature difference between the plates is gradually increased during a certain ime period, and afterwards it is temporarily constant. The temperature istribution on the lower plate is not constant in x-direction, and there is ongitudinal sinusoidal temperature variation imposed on the mean temperature. e investigate the wave number and amplitude influence of this variation on the tability of Rayleigh-Benard convective cells, by direct numerical simulation of 2- Navier-Stokes and energy equation.

Keywords

Dates

  • Submission Date2012-05-05
  • Revision Date2012-09-20
  • Acceptance Date2012-09-25

DOI Reference

10.2298/TSCI120505169J

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