ISSN Online: 2377-424X
ISBN Print: 0-85295-345-3
International Heat Transfer Conference 10
HEAT TRANSFER IN LIQUID IN A CYLINDRICAL CONTAINER WITH A ROTATING DISC AT THE LIQUID SURFACE
Résumé
Measurements were made on the heat transfer
coefficients on the cooled rotating disc, on the heated
side wall of the container and on the heated bottom
wall of the container. The ratios of the height of liquid
and radius of the container to the radius of the disc
were fixed at 2.86 and 1.43, respectively. The value of
Prandtl number was about 4 and the temperature of
the bottom wall was nearly equal to that of the side
wall. The experimental result indicates that the
measured values of all Nusselt numbers on the disc ,
on the side wall and on the bottom wall decrease with
increasing rotational Reynolds number, take minimum
values at a value of Reynolds number, and then
increase with increasing value of Reynolds number.
The critical rotational Reynolds number at which the
Nusselt numbers take minimum values varies with the
Rayleigh number to the power of 0.84. The Nusselt
number on the disc as well as those on the side and
bottom walls increase with increasing Rayleigh
number at smaller Reynolds number. The Nusselt
number on the disc decreases with increasing Rayleigh
number at larger Reynolds number, whereas those on
the side wall and on the bottom wall increase with
increasing Rayleigh number.