Experimental study of the motion and shape of a taylor vapor bubble arising in a channel at saturation pressure
R.A. Dekhtyar
S.S. Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Keywords: Taylor vapor bubble, boiling, superheated liquid
Abstract
The ascent dynamics of a Taylor vapor bubble in a circular (cross-section diameter of 16 mm) and annular (cross-section diameters of 25 and 16 mm) channels at saturation pressure was experimentally studied. The bubble was formed by boiling a superheated degassed liquid. It was found that the velocities of its front and rear surfaces are variable and depend on the ascent mode, its position in the channel, and the previous ascent dynamics. It is shown that this behavior is determined by the spatiotemporal distribution of liquid temperature near the bubble boundary. Based on the obtained results, a map of ascent modes was constructed, linking the nature of the motion with the degree of liquid superheating near the vapor bubble surface.
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