STATISTICS OF BOILING IN A CAPILLARY U-TUBE

摘要

This is an experimental study of boiling in a capillary U-tube immersed in water with heating through an electrical wire at the center of the tube. Visual observation and study of video recordings formed the raw data for analysis. Average frequencies and power spectral densities of bubble emission were determined for different heat fluxes. The average frequency of bubble emission without regard to U-tube branch was found to increase with heat flux. However, the distribution of emission between the two branches was more complicated. At low heat fluxes one of the branches predominated and bubble emission from there was periodic; at intermediate heat fluxes both branches emitted at similar frequencies, largely in an alternate manner; at large fluxes the two branches seemed decoupled and the probability of emission from one branch being followed by the other was about one-half. [References: 7]