Boulder Fluid and Thermal Sciences Seminar Series

Tuesday, October 16, 2018

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3:30pm-4:30pm (refreshments at 3:15pm)
Mechanical Engineering Conference Rooms
Engineering Center
University of Colorado at Boulder

Add to Calendar 10/16/2018 3:30:00 PM 10/16/2018 4:30:00 PM 9 Boulder Fluid and Thermal Sciences Seminar Mechanical Engineering Conference Rooms, Engineering Center, University of Colorado, Boulder MM/DD/YYYY

Jets, shocks, and light emission from collapsing cavitation bubbles

Outi Supponen University of Colorado, Boulder

The impulsive motion of oscillating and collapsing bubbles generate fast flows able to cause erosion in hydraulic machinery but, when controlled, can be beneficial in a wide range of applications such as in biomedicine (e.g., drug delivery, kidney stone reduction, intraocular surgery), cleaning, microfluidics, and food processing. The powerful properties of these bubbles are attributed to the strong acoustic transients, high-speed jetting, and intense thermal effects associated with their violent collapse. In the aim of controlling these phenomena and thereby helping to design the bubbles’ collapse configuration to suit a given application, we have developed semi-empirical models to quantify and predict the strength of the micro-jets, shock waves, and light emission from the collapse of single cavitation bubbles. In this talk, I will present the different experimental techniques we use to capture the dynamics of laser-induced bubbles and our adventures on the European Space Agency parabolic flights, and discuss how gravity and other sources of bubble deformation affect their various collapse events. I will also discuss how the impulsive motion of bubbles open future avenues in numerous biomedical and engineering applications.

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Acknowledgment

Support from Herbert and Karen Vogel is gratefully acknowledged through a Vogel Faculty Fellowship at the University of Colorado, Boulder.

Schedule

Location

The seminar is held at the Discovery Learning Center (DLC) at the University of Colorado. Parking is free with a permit, which is provided at the seminar. The location for parking is shown in the map below.

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