Condición de Frontera Absorbente Discreta No-Local (DNL) en el Cálculo del Arrastre de Onda sobre Barcos

Abstract

An implementation of the absorbing boundary conditions (DNL) [1], for the ship wave resistance problem is presented. In contrast to the Dawson-like methods [2], it avoids the use
of numerical viscosities in the discretization, so that a centered scheme can be used for the free surface operator. The absorbing boundary condition is "completely absorbing", in the sense that the solution is independent of the position of the downstream boundary and is derived from straightforward analysis of the resulting constant-coefficients difference equations, assuming that the mesh is ID-structured (in the longitudinal direction), and requires the eigen- decomposition of a matrix one dimension lower than the system matrix.