A finite difference method for a coupled model of wave propagation in poroelastic materials
作者： Yang Zhang , Limin Song , Max Deffenbaugh , M. Nafi Toksöz
DOI: 10.1121/1.3372640
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摘要: A computational method for time-domain multi-physics simulation of wave propagation in a poroelastic medium is presented. The composed an elastic matrix saturated with Newtonian fluid, and the operates on digital representation where distinct material phase properties are specified at each volume cell. dynamic response to acoustic excitation modeled mathematically coupled system equations: equation solid linearized Navier–Stokes fluid. Implementation solution simplified by introducing common numerical form both fluid cells using rotated-staggered-grid which allows stable solutions without explicitly handling fluid-solid boundary conditions. stability analysis presented can be used select gridding time step size as function properties. results shown agree analytical idealized porous periodically alternating layers.
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