EFFECT OF MODULATION ON THE ONSET OF THERMAL CONVECTION.

Abstract

The stability of a horizontal layer of fluid heated from below is examined when, in addition to a steady temperature difference between the walls of the layer, a time-dependent sinusoidal perturbation is applied to the wall temperatures. Only infinitesimal disturbances are considered. The effects of the oscillating temperature field are treated by a perturbation expansion in powers of the amplitude of the applied field. The shift in the critical Rayleigh number is calculated as a function of frequency, and it is found that it is possible to advance or delay the onset of convection by time modulation of the wall temperatures. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1968
Accession Number
AD0667476

Entities

People

  • Giulio Venezian

Organizations

  • California Institute of Technology

Tags

DTIC Thesaurus Topics

  • Amplitude
  • Convection
  • Frequency
  • Intensity
  • Mathematical Analysis
  • Modulation
  • Perturbations

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Dynamics.