Two-dimensional model for simulating shock-wave interaction with rigid porous materials

A two-dimensional numerical model for predicting the characteristics of the flowfield during an unsteady interaction between a shock wave moving through air and a rigid saturated porous matrix is developed. The numerical model includes a Lagrangian scheme combined with a remesh and an interface tracking technique. The predictions of the numerical simulations are compared with the predictions of a two-dimensional analytical model for regular reflection from a rigid porous surface in pseudosteady flow. The numerical and the physical model are also validated by comparing the one- and two-dimensional predictions of the model with experimental results. In general the predictions of the numerical simulations reveal very good to excellent agreement with both the experimental results and the predictions of the analytical model.