HR: 0800h
AN: NG11A-0179    [Abstracts]
TI: Magnetoacoustic Phenomena in Saturated Porous Media
AU: * Perepechko, Y
EM: perep@online.sinor.ru
AF: IGM SB RAS, 3, ave acad. Koptyuga, Novosibirsk, 630090, Russian Federation
AB: This work deals with dynamic interaction between electromagnetic and hydrodynamic types of motions in a porous medium, saturated with electrolyte. The system of equations is a coupling of equations of the two-velocity continuous filtration theory and Maxwell equations in quasi-stationary approximation. The method of separation by the physical processes is used for numerical solution, and the hyperbolic system is approximated by the explicit expanded Godunov scheme, and the parabolic system is approximated by the inexplicit Crank-Nicolson scheme. Generation of the magnetic field was modeled in the process of 2D electrolyte filtration in a porous medium, which is considered to be conducing because of a double electric layer. An entrainment in the external magnetic field over the electrolyte flow into a porous medium is observed, and the location of magnetic field maximum relative to the inlet boundary is determined by the ratio of kinematic viscosity to magnetic viscosity. A rise of this ratio provides more intensive drag of a filtered liquid and increasing magnetic field, reached in a porous medium. Downward the flow the field decreases because of magnetic field diffusion. The problem with simultaneous excitation of acoustic and electromagnetic perturbations at the boundary of saturated porous medium was also considered, and this allows us to obtain additional knowledge about accompanying effects and phenomena, what is the main scientific and practical goal of geophysics and oil survey. This research was supported by the Russian Foundation for Basic Research grant 06-05-65110, by the President's grants NSh-1573.2003.5, and by the Russian Ministry Science and Education grant RNP.2.1.1.702.
DE: 0545 Modeling (4255)
DE: 0644 Numerical methods
DE: 0689 Wave propagation (2487, 3285, 4275, 4455, 6934)
DE: 3285 Wave propagation (0689, 2487, 4275, 4455, 6934)
DE: 4445 Nonlinear differential equations
SC: Nonlinear Geophysics [NG]
MN: 2007 Fall Meeting