Examination of Particle Force Model and its Uncertainty in a Detonation-Driven Multiphase Flow*

Recent work in the compressible, multiphase flow community has shown that the compressible Maxey-Riley-Gatignol (MRG) force model captures the transient forces exerted on a particle by a passing air shock and compressed flow. In this work, the model's predictive capability in the post-detonation flow regime is considered following a rigorous study of the explosive products as the carrier phase. The model parameters of the JWL equation of state are varied to observe their individual sensitivities on the post-detonation flow. Uncertainty quantification with experimental data provides the most influential and likely JWL parameters. With the gas phase in agreement with experiments, the validity of the compressible MRG model under extreme condition is reviewed. Experimental X-ray data provides the trajectory of a few Tungsten particles ejected from an initial explosion. Particle trajectory data from experiments is compared with finite-volume, Euler-Lagrange, point-particle simulations results employing the MRG model.