ALL libraries (COBIB.SI union bibliographic/catalogue database)
  • Wall-temperature distributions on thin metal foils in saturated and subcooled pool boiling [Elektronski vir]
    Golobič, Iztok ; Voglar, Jure ; Zupančič, Matevž, 1990-
    Boiling on thin Joule heated metal foils is one of the few approaches that allow studying transient temperature fields underneath the growing vapor bubbles. In our experiments, we use synchronized ... high-speed video and high-speed infrared cameras to visualize the departing bubbles with the corresponding local wall-temperature measurements. In terms of boiling performance evaluation, recent study [1] showed that wall-temperature distributions are good alternative to classical boiling curves. These distributions are calculated form spatio-temporal thermographs and provide spectra of information, such as the maximum, minimum and mean wall superheat and the standard deviation of the wall temperature (see Fig. 1). Main objective of the lecture is to present the effect of fluid type and subcooling on pool boiling performance. Differences in boiling behavior will be explained through wall-temperature probability density distributions, nucleation frequencies and density of active nucleation sites over al large span of heat fluxes. The results should provide a better insight into the complex phenomena of nucleate pool boiling for high-surface-tension fluids (water) and low surface-tension fluids (FC-72) at different subcooling rates, which could be in future compared with the data obtained in microgravity conditions. Among that, wall-temperature distributions are also useful for comparing the experimental data with numerical simulation results.
    Source: Book of abstracts [Elektronski vir] (F. [7])
    Type of material - conference contribution
    Publish date - 2016
    Language - english
    COBISS.SI-ID - 14909723

    Link(s):

    http://www.ittw2016.fr/files/7914/7740/3064/Golobic_Keynote_ITTW2016.pdf

Shelf entry