Numerical study of thermoacoustic detection of composite materials

Abstract

Abstract. In this paper, to study the applicability of thermoacoustic detection of composite materials, the distribution of thermoacoustic waves was numerically calculated when there was a nickel domain inside the silicon domain by applying a sinusoidally varying heat source on the surface of solid silicon domain. By changing the width, thickness and position of the internal nickel domain, the applicable conditions of detecting whether there is another material inside the silicon domain by the distribution of the thermoacoustic waves were studied. In addition, a method of judging the width of the inner nickel domain was given. And the corresponding error was studied.