The hydro- and thermodynamical processes near and within a thermoacous
tic couple are simulated and analyzed by numerical solution of the com
pressible Navier-Stokes, continuity, and energy equations for an ideal
gas, concentrating on the time-averaged energy flux density in the ga
s. The numerical results show details of the heat sink at one end of t
he plates in the thermoacoustic couple. (C) 1996 Acoustical Society of
America.