Akademik Veri Yönetim Sistemi
1st International Conference on Scientific and Academic Research, Konya, Türkiye, 10 - 13 Aralık 2022, ss.146
Pool boiling is encountered in many industrial
sectors varying from power plants to chemical reactors. Even though the bubble
formations as well as departures from the heating surface are known or can be
estimated for the water, there are no detailed data on how bubbles form and
departure if the working fluid is nanofluid, which is the colloidal suspension
that has been widely used in recent times. There are lots of studies
illustrating that nanofluids can enhance heat transfer performance via their
enhanced thermophysical properties like density, specificity heat, thermal
conductivity, and so forth. It is a well-known fact that the heating surface
has also affected the process aforementioned. In this study, the effect of
cavities on both bubble formations and departures for alumina nanofluid (1.0%
vol.) was studied. A set of numerical analyses was conducted for the distilled
water and alumina nanofluid, respectively. Vapor volume fractions and velocity
distributions were investigated around the heater area. As a geometer of the cavity,
triangle and semicircle-shaped cavities were taken into account. The obtained
results showed that bubble nucleation, and thereby bubble formations increased
when a cavitied surface was utilized. While the cavities caused the overall
heating areas to increase, the departure of the bubbles from the surfaces took
a long time.