【GIR Open Seminar】 Dr. Claus-Dieter Ohl / Otto-von-Guericke University (Germany)

Date	2023.10.18 (15：00 - 16：00)
Venue	Room 201, 2F., Building 6, Koganei Campus, TUAT Zoom Meeting ID:828 7674 7984 Passcode:69703
Google Classroom Code	5e2tszl
Speaker	Dr. Claus-Dieter Ohl
Affiliation	Otto-von-Guericke University (Germany)
Title	"Cavitaton Bubbles interaction with hard and soft matter: from erosion to nucleation" ＜Abstract＞　Non-spherical cavitation bubble dynamics in liquids are known to create enormous shear stresses which may be even enhanced when the bubbles are entrained in a flow. Yet the mechanism by which cavitation creates erosion is through shock wave focusing and not related to the jet impact or a spherical energy focusing. It is actually the opposite; erosion results from the loss of axisymmety. 　Non-spherical cavitation in elastic solids generate shear waves that transport deformation energy to distances much larger than the local strain field. We will show that two shear waves with different orientation are generated near a boundary and their individual amplitude is a function of the stand-off distance. These waves can be recorded with acoustic plane wave imaging at very high frame rates. I’ll end the presentation with a mechanism through which cavitation is nucleated from shock-wave gas-bubble interaction in tissue.
Language	English
Intended for	Everyone is welcome to join.
Co-Organized by	Institute of Global Innovation Research, “LIFE SCIENCE” Tagawa Team Excellent Leader Development for Super Smart Society by New Industry Creation and Diversity
Contact	Institute of Global Innovation Research, Institute of Engineering Prof. Yoshiyuki Tagawa Email: tagawayo(at)cc.tuat.ac.jp
Remarks	This seminar will be held both face-to-face and online concurrently. (Video streaming through Google Classroom later.) Professor Claus-Dieter Ohl ＜Short biography＞ Professor Claus-Dieter Ohl has started his education into bubbles in Göttingen with the late Professor Werner Lauterborn. In 1999 he joined as a postdoc with Professor Andrea Prosperetti at Johns Hopkins University followed by Professor Detlef Lohse at the University of Twente. In 2005 he become VIDI fellow in Twente and started the research group “Jetting into cells”. In 2007 Prof. Ohl become Assistant Professor and in 2012 Associate Professor at the Nanyang Technological University. His research interest includes high-speed fluid mechanics, acoustics, nanobubbles, nucleation phenomena, boiling, and medical applications of cavitation. Since 2017 he joined as full Professor the Otto-von-Guericke University in Magdeburg where research into large empty bubbles started many centuries ago.

Event

【GIR Open Seminar】 Dr. Claus-Dieter Ohl / Otto-von-Guericke University (Germany)