A SIMPLE METHOD TO COMPUTE THE RESPONSE OF NONHOMOGENEOUS AND IRREGULAR INTERFACES - ELECTRODES AND MEMBRANES

We present a detailed numerical test of the coarse-graining method pro posed by Sapoval to compute the flux through an irregular interface in the case where the local response is inhomogeneously distributed. It is shown, through comparison with detailed finite elements simulations , that this method permits to deduce the flux across an irregular inte rface from its topography only, as for example in the case of non-unif orm polarizability in electrochemistry. The interest of the method lie s in its computational simplicity. It then constitutes an essential st ep towards the understanding of the flux across irregular interfaces i n non-linear regimes.