Author(s)

C. Karra, M. Ben Tahar, G. Marquette & M.T. Chau

Abstract

A new variational formulation using integral equations of sound acoustic propagation problems including viscous and thermal effects of the fluid is considered. This formulation is implemented numerically for the problems with revolution geometry by using the boundary element method. The numerical results are in good agreement with analytic ones in the case of a cylindrical cavity filled with air and submitted to a pressure excitation. It is shown that in the case of micro cavities, the viscous and thermal effects of air becomes important : the acoustic pressure is different to those obtained when the effects of viscosity and thermal conductiv

Keywords