RT Journal Article
ID 4a43dda54366f636
A1 Duwairi, Hamzeh Mustafa
T1 SOUND WAVES PROPAGATION WITHIN POROUS LAYERS USING FORCHHEIMER'S MODEL
JF Journal of Porous Media
JO JPM
YR 2014
FD 2014-08-26
VO 17
IS 8
SP 723
OP 730
K1 sound waves
K1 Forchheimer's model
K1 porous medium
AB A fully nonlinear wave analysis is performed for an acoustic wave which propagates through an isentropic porous medium under the boundary layer approximations. It is found that the main three parameters that govern the propagation process are reduced frequency parameter, Re = ρKω/µ; Forchheimer's number, Fr = a/√Kω; and porosity, ε. The propagation process takes place under isentropic conditions and the sound disturbance is under monofrequency and harmonic conditions. It is found that as porosity e is increased, the attenuations and phase shift for both forward and backward sound waves is decreased; this is due to unfavorable acoustic wave propagation in plain medium. The effect of increasing the reduced frequency number, Re, is found to decrease attenuation and increase phase shift velocities; this is also due to the movement of porous medium to the plain medium limit and due to low viscous damping effects. The effect of increasing Forchheimer's number is found to decrease attenuation and increase phase shift for both forward and backward sound waves.
PB Begell House
LK https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,0e3c88265a3d2582,4a43dda54366f636.html