ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
THE CONDENSATION OF VAPOUR BUBBLE IN AN IMMISCIBLE LIQUID
Abstract
This work is an experimental and theoretical study of the condensation and collapse of single bubbles of either iso-pentane or n-pentane in an immiscible liquid medium consisting of either distilled water or an aqueous glycerol solution. In the experiments single bubbles were injected into the bottom of the immiscible liquid column and were photographed using a Bolex cine-camera as
they rose through the column. The photographs were
analysed to give values of equivalent bubble radius
and distance of bubble travel. These were then
related to the time from bubble departure to give
bubble size and mean bubble velocity. The theoretical
model assumed a liquid condensate film, of
uniform thickness forming and draining into a pool
at the bottom of the bubble. Allowance was made
for the presence of non-condensible gas and for
increase of concentration and gas diffusion towards
the interface as condensation continued. Because
the liquid pool volume was small in all tests the
collapse equations obtained were simplified and the
experimental results compared with these simplified
equations.