Heat generation by impulse ultrasound.
An original method allowing to get a system of nonlinear evolution equations for the interacting modes applies to a problem of the heat generation by non-periodic ultrasound, including impulse one. The basic idea and final equations for the thermoviscous plane flow are presented. The limit of periodic source is traced. The numerical calculations were based on the pulse solution of the Burgers equation as an ultrasound source. Some illustrations on temporal behavior of the medium expansion caused by the pulse ultrasound are presented.
Perelomova
Anna
A
Faculty of Applied Physics and Mathematics, Department of Theoretical Physics, Technical University of Gdańsk, ul. G. Narutowicza 11/12, 80-952 Gdansk, Poland. anpe@mifgate.mif.pg.gda.pl