Effect of Local Fluid Flow on Rayleigh Waves in a Double Porosity Solid

2014 ◽  
Vol 104 (6) ◽  
pp. 2633-2643 ◽  
Author(s):  
M. D. Sharma
Keyword(s):  
Fluid Flow ◽  
Rayleigh Waves ◽  
Double Porosity ◽  
Local Fluid Flow

Velocity field of wave-induced local fluid flow in double-porosity media

2014 ◽  
Vol 57 (6) ◽  
pp. 1020-1030 ◽  
Author(s):  
Jing Ba ◽  
Lin Zhang ◽  
WeiTao Sun ◽  
ZhaoBing Hao
Keyword(s):  
Fluid Flow ◽  
Velocity Field ◽  
Double Porosity ◽  
Wave Induced ◽  
Local Fluid Flow

Effect of local fluid flow on the reflection and transmission of elastic waves at an interface between an elastic solid and a double-porosity medium

Geophysics ◽  
2020 ◽  
Vol 85 (4) ◽  
pp. T237-T256
Author(s):  
Enjiang Wang ◽  
Jing Ba ◽  
José M. Carcione ◽  
Yang Liu ◽  
Hongchao Dong
Keyword(s):  
Fluid Flow ◽  
Elastic Waves ◽  
Vertical Direction ◽  
Elastic Solid ◽  
Double Porosity ◽  
Reflection And Transmission Coefficients ◽  
Reflection And Transmission ◽  
Transmission Coefficients ◽  
Slowness Vector ◽  
Local Fluid Flow

We have studied the reflection and transmission of elastic waves incident on an interface separating an elastic solid and a double-porosity medium described by the Biot-Rayleigh model that considers the effect of local fluid flow (LFF). The P1- and SV-wave incidence generates two reflected elastic waves in the elastic solid and four transmitted inhomogeneous waves in the double-porosity medium, represented by Helmholtz potential functions. The reflection and transmission coefficients are derived in closed form based on the boundary conditions at the interface. Energy ratios are then derived, and energy conservation at the interface is verified. The contribution of fluid flow to the three transmitted longitudinal waves in the double-porosity medium is expressed as a function of frequency, the transmission coefficient, and the corresponding slowness vector. Numerical examples indicate that LFF predicts significant compressional-wave velocity dispersion in the seismic band, and frequency-dependent reflection and transmission coefficients. For the case in which the incidence angle is larger than the critical angle, the transmitted P1-wave shows a nonzero energy flux in the vertical direction, whereas it does not if LFF is absent.

Simulator for adjusting optical meters of local fluid flow velocities

1971 ◽  
Vol 14 (7) ◽  
pp. 1129-1130
Author(s):  
E. M. Aristov ◽  
B. A. Pavlovskii ◽  
S. F. Yuras
Keyword(s):  
Fluid Flow ◽  
Local Fluid Flow ◽  
Flow Velocities
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