Abstract：
:This paper deals with 2-D simulation of finite-amplitude standing waves behavior in rectangular acoustic resonators. Set of three partial differential equations in third approximation formulated in conservative form is derived from fundamental equations of gas dynamics. These equations form a closed set for two components of acoustic velocity vector and density, the equations account for external driving force, gas dynamic nonlinearities and thermoviscous dissipation. Pressure is obtained from solution of the set by means of an analytical formula. The equations are formulated in the Cartesian coordinate system. The model equations set is solved numerically in time domain using a central semi-discrete difference scheme developed for integration of sets of convection-diffusion equations with two or more spatial coordinates. Numerical results show various patterns of acoustic field in resonators driven using vibrating piston with spatial distribution of velocity. Excitation of lateral shock-wave mode is observed when resonant conditions are fulfilled for longitudinal as well as for transversal direction along the resonator cavity.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Cervenka M,Bednarik Mdoi
10.1016/j.ultras.2006.05.008subject
Has Abstractpub_date
2006-12-22 00:00:00pages
e773-6eissn
0041-624Xissn
1874-9968pii
S0041-624X(06)00035-7journal_volume
44 Suppl 1pub_type
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