Chemiluminescence images were observed directly through the
Fig. 2. (a) Comparison of temperature profiles measured at the same distances below the porous surface (1.5 mm) for Toil = 150, 160, 170, and 180 °C. (b) Influence of gravity level on temperature profiles, T, 0.5 mm below the porous surface. The blue dots on the curves designate the beginning of the boiling regime. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 3. Propagation of the P 005091 front, δef, (designated as the Tp = 100 ± 0.5 °C zone) for various: (a) initial oil temperatures and (b) gravity levels.Figure optionsDownload full-size imageDownload as PowerPoint slide
3.2. Optical recordings
Fig. 4a presents the bubble size distribution corresponding to the summation of all the bubbles generated during a single experiment for Toil = 150 °C. It must be noted severe combined immunodeficiency (SCID) the y-axis stands for the real number of bubbles counted. The bubble size distribution roughly follows a normal distribution. The average bubble diameter, Db, is approximately 0.5 mm. Fig. 4b presents the average bubble diameter, Db plotted against the boiling time for all the gravity levels tested. Average values at different time instants are computed from optical recordings lasting 1 s.