A Time-Dependent Wave-Thermoelastic Solid Interaction
This work extends existing fluid-structure interaction methods to thermoelastic solids, providing a theoretical foundation and numerical scheme for a specific domain (wave-thermoelastic interaction).
The authors develop a combined field and boundary integral equation method for time-dependent scattering of a thermoelastic solid in a fluid, proving existence, uniqueness, and error estimates, with 2D numerical experiments demonstrating accuracy.
This paper presents a combined field and boundary integral equation method for solving the time-dependent scattering problem of a thermoelastic body immersed in a compressible, inviscid and homogeneous fluid. The approach here is a generalization of the coupling procedure employed by the authors for the treatment of the time-dependent fluid-structure interaction problem. Using an integral representation of the solution in the infinite exterior domain occupied by the fluid, the problem is reduced to one defined only over the finite region occupied by the solid, with nonlocal boundary conditions. The nonlocal boundary problem is analyzed with Lubich's approach for time-dependent boundary integral equations. Existence and uniqueness results are established in terms of time-domain data with the aid of Laplace-domain techniques. Galerkin semi-discretization approximations are derived and error estimates are obtained. A full discretization based on the Convolution Quadrature method is also outlined. Some numerical experiments in 2D are also included in order to demonstrate the accuracy and efficiency of the procedure.