Numerical simulation of shock-induced motion of a cuboidal solid body using the overset grid functionality of OpenFOAM

Numerical simulation of the motion of a cuboidal solid body induced by a propagating shock wave was conducted by using the overset grid functionality of OpenFOAM (v1712). A body-fitted grid associated with the moving body was overlapped with a background Cartesian grid fixed in space, and transient, three-dimensional, inviscid flows around the moving body were simulated coupled with the six-degrees-of-freedom motion of the solid body. The results from the present simulation were compared with those from shock tube experiments, in which the shock-induced motion of a cuboidal solid body floating in air and the flow field around the solid body were visualized using the shadowgraph technique and recorded by a high-speed video camera with a frame rate of 20,000 frames per second. The good agreement found between the numerical and experimental results for the translational and angular displacements of the shocked solid body indicates the capability of OpenFOAM to predict the shock-induced motion of a solid body.