Searched for: author%3A%22Smeulders%2C+D.M.J.%22
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Wisse, C.J. (author), Smeulders, D.M.J. (author), Chao, G. (author), Van Dongen, M.E.H. (author)
The classical theory of wave propagation in elastic cylinders is extended to poro-elastic mandrel modes. The classical theory predicts the existence of undamped L modes and damped C, I, and Z modes. These waves also appear in poro-elastic mandrels, but all of them become damped because of viscous effects. The presence of the Biot slow bulk wave...
journal article 2007
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Chao, G.E. (author), Smeulders, D.M.J. (author), Van Dongen, M.E.H. (author)
We present an exact theory of attenuation and dispersion of borehole Stoneley waves propagating along porous rocks containing spherical gas bubbles by using the Biot theory. An effective frequency-dependent fluid bulk modulus is introduced to describe the dynamic (oscillatory) behavior of the gas bubbles. The model includes viscous, thermal, and...
journal article 2007
document
Chao, G. (author), Smeulders, D.M.J. (author), Van Dongen, M.E.H. (author)
Acoustic experiments on the propagation of guided waves along water-filled boreholes in water-saturated porous materials are reported. The experiments were conducted using a shock tube technique. An acoustic funnel structure was placed inside the tube just above the sample in order to enhance the excitation of the surface modes. A fast Fourier...
journal article 2006
document
Chao, G. (author), Smeulders, D.M.J. (author), Van Dongen, M.E.H. (author)
Numerical results for the velocity and attenuation of surface wave modes in fully permeable liquid/partially saturated porous solid plane interfaces are reported in a broadband of frequencies (100?Hz–1?MHz). A modified Biot theory of poromechanics is implemented which takes into account the interaction between the gas bubbles and both the liquid...
journal article 2006
Searched for: author%3A%22Smeulders%2C+D.M.J.%22
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