Publications in Scientific Journals:
Ch. Lechner, M. Koch, W. Lauterborn, R. Mettin:
"Pressure and tension waves from bubble collapse near a solid boundary: a numerical approach";
Journal of the Acoustical Society of America,
142
(2017),
6;
3649
- 3659.
English abstract:
The acoustic waves being generated during the motion of a bubble in water
near a solid boundary are calculated numerically.
The open source package OpenFOAM is used for solving the Navier-Stokes equation and extended
to include nonlinear acoustic wave effects via the Tait equation for water.
A bubble model with a small amount of gas is chosen, the gas obeying an adiabatic law.
A bubble starting from a small size with high internal pressure
near a flat, solid boundary is studied.
The sequence of events from bubble growth via axial microjet formation, jet impact,
annular nanojet formation, torus-bubble collapse, and bubble rebound
to second collapse is described.
The different pressure and tension waves with their propagation properties are demonstrated.
Keywords:
bubble dynamics, jet formation, annular jet, torus shock waves
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1121/1.5017619
Created from the Publication Database of the Vienna University of Technology.