A computational method to predict the reflected and transmitted ultrasonic fields with interfaces of complex geometry

This paper presents a computational method to calculate the reflected and transmitted ultrasonic fields with interfaces of complex geometry. The method is divided into two steps. In a first step, the velocity potential impulse response is determined at the interface using the Rayleigh integral and considering the reflection and transmission coefficients. In a second step, the simulated fields are calculated by applying the Huygens´ principle to the whole-extended interface. In order to validate the method, the simulated fields were compared to some experimental cases as, for instance, a cylindrical concave surface between two media (water-acrylic). The experimental ultrasonic fields are in good agreement with those provided by the model.