Euler-Lagrange Simulations of Shock-Particle Cloud Interaction*

Euler-Lagrange (EL) simulations of a shockwave interacting with a cloud of fixed and a cloud of movable particles at various volume fractions (10%-30%) and shock Mach numbers (1.22-3.0) are performed. Results from the particle-resolved simulations of fixed particles and experiments performed at the Multiphase Shock Tube (MST) facility at Sandia National Laboratories (SNL) are used to validate the fixed cloud and the moving cloud EL simulations respectively. In the fixed cloud simulations, the effect of the wave drag at supersonic flow Mach numbers is modeled as an inviscid drag. The mean thermodynamic and kinematic gas quantities and the forces experienced by the particles at very short time-scales are compared against the particle-resolved simulations. In case of the movable particle simulations, the effects of initial particle curtain profile on the particle cloud trajectory is studied. For this, results from a top-hat profile and a curve fit (obtained from the experimental data) are compared against the experimental results.