ISSN Online: 2377-424X
International Heat Transfer Conference 3
TRANSIENT NATURAL CONVECTION IN A NARROW VERTICAL CELL
Sinopsis
Transient and steady state natural convection was studied in a long vertical rectangular cell
with mixed constant heat flux-constant wall temperature boundary conditions. Air, water and silicone
were used over a Rayleigh number range from 900 to 2 × 106. Both temperature and velocity profiles were
obtained.
The starting transient begins with almost pure conduction prior to the establishment of the convective pattern. In water this shift is associated with a complicated set of travelling waves. At high Rayleigh numbers air and water exhibit steady state oscillations suggesting incipient turbulence. Cell inversion transients were also studied.
Overall steady state heat transfer data agree with the correlations of previous investigators for the isothermal vertical-wall cell.
The starting transient begins with almost pure conduction prior to the establishment of the convective pattern. In water this shift is associated with a complicated set of travelling waves. At high Rayleigh numbers air and water exhibit steady state oscillations suggesting incipient turbulence. Cell inversion transients were also studied.
Overall steady state heat transfer data agree with the correlations of previous investigators for the isothermal vertical-wall cell.