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A platform for research: civil engineering, architecture and urbanism
Observation of the Diffuse Biot Slow Wave via its Electrokinetic Coupling : A Numerical Perspective
In this paper, we present numerical results suggesting that the Biot slow wave predicted by poroelastic theory could indirectly be observed in the diffuse regime, thanks to its electric field signature generated through electrokinetic coupling. This seismo-electromagnetic coupling phenomenon was theoretically described in terms of dynamic equations which coupled seismic wave propagation theory in saturated porous media with Maxwell electromagnetic equations via transport equations of electrical charges and fluid's. A numerical code was developed ten years ago using a generalized reflectivity approach in the frequency-wavenumber domains to model the coupled seismo-electromagnetic waves in saturated stratified porous media. Based on this code, we present here new synthetic studies clearly suggesting that electrokinetic wave conversions could make it possible to record and study the Biot slow wave in real conditions and at low frequencies (diffuse regime), a goal that has never been achieved until now due to its low seismic signature. These synthetic observations are then theoretically explained after deriving electric/seismic transfer functions for a wide frequency range.
Observation of the Diffuse Biot Slow Wave via its Electrokinetic Coupling : A Numerical Perspective
In this paper, we present numerical results suggesting that the Biot slow wave predicted by poroelastic theory could indirectly be observed in the diffuse regime, thanks to its electric field signature generated through electrokinetic coupling. This seismo-electromagnetic coupling phenomenon was theoretically described in terms of dynamic equations which coupled seismic wave propagation theory in saturated porous media with Maxwell electromagnetic equations via transport equations of electrical charges and fluid's. A numerical code was developed ten years ago using a generalized reflectivity approach in the frequency-wavenumber domains to model the coupled seismo-electromagnetic waves in saturated stratified porous media. Based on this code, we present here new synthetic studies clearly suggesting that electrokinetic wave conversions could make it possible to record and study the Biot slow wave in real conditions and at low frequencies (diffuse regime), a goal that has never been achieved until now due to its low seismic signature. These synthetic observations are then theoretically explained after deriving electric/seismic transfer functions for a wide frequency range.
Observation of the Diffuse Biot Slow Wave via its Electrokinetic Coupling : A Numerical Perspective
Garambois, S. (author) / Dietrich, M. (author)
Fifth Biot Conference on Poromechanics ; 2013 ; Vienna, Austria
Poromechanics V ; 282-291
2013-06-18
Conference paper
Electronic Resource
English
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