Cavitation inception on microparticles: a self-propelled particle accelerator.
Corrugated, hydrophilic particles with diameters between 30 and 150 microm are found to cause cavitation inception at their surfaces when they are exposed to a short, intensive tensile stress wave. The growing cavity accelerates the particle into translatory motion until the tensile stress decreases, and subsequently the particle separates from the cavity. The cavity growth and particle detachment are modeled by considering the momentum of the particle and the displaced liquid. The analysis suggests that all particles which cause cavitation are accelerated into translatory motion, and separate from the cavities they themselves nucleate. Thus, in the research of cavitation nuclei the link is established between developed cavitation bubbles and their origin.
Arora
Manish
M
Department of Applied Physics, Physics of Fluids, University of Twente, Postbus 217, 7500 AE Enschede, The Netherlands.
Ohl
Claus-Dieter
CD
Mørch
Knud Aage
KA