Krauklis wave propagation within a complex fracture system: Modeling via a two-dimensional time-harmonic boundary element method

Abstract

Fluid-filled fractures involving kinks and branches result in complex interactions between Krauklis waves—highly dispersive and attenuating pressure waves within the fracture—and the body waves in the surrounding medium. For studying these interactions, we introduce an efficient 2D time-harmonic elastodynamic boundary element method. Instead of modeling the domain within a fracture as a finite-thickness fluid layer, this method employs zero-thickness, poroelastic Linear-Slip Interfaces to model the low-frequency, local fluid–solid interaction. Using this method, the scattering of Krauklis waves by a single kink along a straight fracture and the radiation of body waves generated by Krauklis waves within complex fracture systems are examined.