Fredagskollokvium:  Shock interactions with inert and reactive particles

The talk will present work in progress and preliminary results from experimental and numerical studies of shock propagation through particle-laden gas columns. Published experimental data on shock interaction with inert and reactive particles is rather sparse, and often not sufficiently documented. The experimental work therefore aims at providing quantitative data that can be used for the verification of the physical and chemical parameters and models to be used in the numerical simulations.The experiments are conducted in a  shock tube facility which has been built up at Østøya, Horten. In order to simulate short duration blast waves, the length of the driver section is very short. A specially designed window section is used together with high-speed video cameras to allow shock–particle interaction in directions perpendicular to each other to be captured. Numerical simulations are performed with Regularized Smoothed Particle Hydrodynamics (RSPH), an extension to the original Smoothed Particle Hydrodynamics method (SPH). RSPH allows a piecewise variable spatial resolution and particle regularization at regular time intervals. RSPH has recently been further extended to include multi-phase situations (gas and dust).  Numerical and experimental results are compared, and  the effect of the different parameters and models are illustrated.