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Details for article 1 of 5 found articles
| Title: |
DYNAMICS OF BOILING FROM A SHORT CAPILLARY TUBE |
| Author: |
Ramos, Eduardo Parmananda, P. Hernandez-Cruz, Guillermo Sen, Mihir |
| Appeared in: |
Experimental heat transfer |
| Paging: | Volume 10 (1997) nr. 4 pages 273-290 |
| Year: |
1997-10-01 |
| Contents: |
The phenomenon of boiling from a short capillary tube is studied experimentally, with the objective of better understanding the dynamics of phase change at nucleation sites. Boiling is achieved by electrical heating of a resistor in a short, water-filled capillary tube immersed in a pool of hot water. Bubble departure is detected by a phototransistor when a bubble passes through a laser beam. Two qualitatively different behaviors are observed. At low heat rates, bubbles depart with two possible periods. There are packages of a small number of bubbles departing with an almost constant period, separated by sets of two bubbles emitted at a shorter period. The behavior at large heat rates is singly periodic. In both cases, a small, apparently stochastic perturbation is superposed on the regular pattern, A statistical analysis of the experimental data is also carried out. For the low heating case, the output signal of the detector has been used as a time series to reconstruct the system attractor in phase space. The largest Lyapunov exponent obtained from the time-series information is positive, indicating that the phenomenon can be considered as chaotic. A physical model has been developed to interpret the various physical mechanisms that yield the observed qualitative behavior. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 1 of 5 found articles
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