Numerical validation of various mixing rules used for up-scaled geo-physical properties

Johannes Bruining, Evert Slob, Willem-Jan Plug & Willem-Jan Plug
Our objective is to interpret laboratory measurements of effective dielectric permittivities as a function of water saturation during drainage and imbibition processes in a porous medium. Mixing rules are widely used to express effective properties of coefficients, e.g. diffusion coefficient, Darcy permeability, electric conductivity and the dielectric permittivity, appearing in heterogeneous diffusion like processes. Here we confine our interest to the electrostatic behaviour of a mixture because most of the mixing rules were derived to...
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