The role of Brinkman viscosity in poroacoustic propagation

Through perturbation analysis, we study the role of Brinkman viscosity in the propagation of finite amplitude harmonic waves. Interplay between various parameters, namely frequency, Reynolds number and beta, is investigated. For systems with physically realizable Reynolds numbers, departure from the Darcy Jordan model (DJM) is noted for high frequency signals. The low and high frequency limiting cases are discussed, and the physical parameters defining the acoustic propagation are obtained.