ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
EFFECT OF MASS TRANSFER ON THE RATE OF HEAT TRANSFER TO STATIONARY SPHERES IN HIGH TEMPERATURE SURROUNDINGS
Abstract
An experimental study was conducted to
elucidate the effect of mass transfer on the rate
of heat transfer to stationary spheres exposed
to an argon plasma tail flame (temperature up to
4 300 K). Argon, helium and neon were injected
through porous graphite spheres (diameters 6-mm,
8-mm and 9-mm) to simulate mass transfer on the
surface of the particles. Heat transfer rates
from the laminar plasma jet to the spheres were
determined with and without mass transfer. The
particle Reynolds number ranged from 40 to 110
and the temperature ratio (between the particle
and the bulk flow) from 0.38 to 0.56. The
results indicated a decrease of 15% on the
average in the value of the heat transfer
coefficient in the presence of mass transfer.