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Completing Biot theory

机译:完成毕奥理论

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摘要

Biot theory is completed by redeveloping the equations of motion for a multi-phase medium with no restrictive assumptions, obtaining equations explicitly coupling diffusion and inertial terms. Major improvements upon the classical Biot-Gassmann formalism include recognizing that the porosity is a state variable and treating it as such, incorporating diffusion terms with the standard inertial wave equation terms in a fully coupled manner based on first-order thermodynamics, and satisfying the physical continuity and conservation conditions rigorously for all boundary conditions. The complete set of linear equations describes motion at all time scales, ranging from quasi-static Darcy flow (ω < 10~(-4) Hz) to high frequency vibrations (ω>10~(-6) Hz). Of particular interest is the prediction of the existence of a long wavelength displacement wave that arises because of the coupling of the solid matrix motions and the inc ompressible behavior of the pore fluid.
机译:通过重新开发无限制假设的多相介质的运动方程,获得明确地将扩散项和惯性项耦合的方程,从而完成了毕奥特理论的完善。对经典Biot-Gassmann形式主义的主要改进包括:认识到孔隙率是状态变量并将其视为状态变量;基于一阶热力学以完全耦合的方式将扩散项与标准惯性波方程项合并在一起,并满足物理条件。严格针对所有边界条件的连续性和保护条件。完整的线性方程组描述了所有时间范围内的运动,范围从准静态达西流(ω<10〜(-4)Hz)到高频振动(ω> 10〜(-6)Hz)。特别令人感兴趣的是对长波长位移波的存在的预测,该波长位移波是由于固体基质运动和孔隙流体不可压缩的行为耦合而产生的。

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