Numerical calculation of gravity-capillary interfacial waves of finite amplitude

Abstract
Gravity-capillary progressive interfacial waves on the interface between two semi-infinite fluids of different densities are considered. An integro-differential equation for the unknown shape of the interface is derived. By introducing a mesh and finite difference, this equation is converted into a finite set of nonlinear algebraic equations. These equations are solved by Newton’s method. In the limiting case of pure gravity waves, the results obtained are in good agreement with previous calculations. Two continuous families of capillary-gravity waves are studied. A generalization of Wilton’s ripples for interfacial waves is presented.

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