On a Variational Inequality Formulation of an Electrochemical Machining Moving Boundary Problem and its Approximation by the Finite Element Method

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Abstract
An electrochemical machining moving boundary problem is formulated, after a change of variable, as an elliptic variational inequality. The unknown anode surface may now be found by solving just one elliptic free boundary problem. The variational inequality is approximated by the finite element method and numerical results are presented.