Experimental Study on the Effects of Phase Change During a Bubble Collapse
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A planar shock front produced in a shock tube provides an instantaneous pressure rise within a water-like gelatin mixture that contains bubbles filled with two different gases. Air represents a gas that reacts non-condensable under the experimental conditions, while refrigerant vapor R1233zd-E is a gas with a vapor pressure slightly above atmospheric pressure under the experimental conditions. We compare both types of bubbles during an aspherical collapse and highlight similarities and differences in order to analyze the effect of the gas content on collapse dynamics. The experimental set-up is presented and preliminary results are discussed. An image sequence of a recorded video and normalized radius data show the dynamic response of both investigated bubble types positioned next to each other close to a solid wall. A difference in the rebound behavior is indicated with the R1233zd-E bubble expanding more omnidirectional and to a lower relative radius.