Boundary conditions for a fluid-saturated porous solid
نویسنده
چکیده
Using Biot's theory, a set of boundary conditions is presented for wave transmission and reflection at the contact surface between an elastic medium (fluid or solid) and a fluid-saturated porous solid (Biot medium). The analysis shows the continuity of the normal component of the density energy flux vectors across the contact surfaces, so that total energy is preserved. Energy reflection and transmission coefficients are computed for each kind of Biot wave. The continuity of the normal component of the density energy flux vectors is maintained in applying these boundary conditions, so that the total energy is preserved. Finally, the density energy flux vectors are used to compute the energy transmission and reflection coefficients for the three cases mentioned above. The expressions derived for these coefficients, which are useful for quantitative estimations, generalize those obtained by Dutta and Ode (1983) for a gas-water contact. STRESS-STRAIN RELATIONS OF A BlOT MEDIUM
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