Surface tension models for a multi-material ALE code with AMR

Abstract

a b s t r a c tA number of surface tension models have been implemented in a 3D multi-physics multi-material code, ALE-AMR, which combines Arbitrary Lagrangian Eulerian (ALE) hydrodynamics with Adaptive Mesh Refinement (AMR). ALE-AMR is unique in its ability to model hot radiating plasmas, cold fragmenting solids, and most recently, the deformation of molten material. The surface tension models implemented include a diffuse interface approach with special numerical techniques to remove parasitic flow and a height function approach in conjunction with a volume-fraction interface reconstruction package. These surface tension models are benchmarked with a variety of test problems. Based on the results, the height function approach using volume fractions was chosen to simulate droplet dynamics associated with extreme ultraviolet (EUV) lithography.

Rarefaction waves in van der Waals fluids with an arbitrary number of degrees of freedom

“…However, because it is an equilibrium the-ory, the Maxwell construction cannot model droplets and bubbles created in the two-phase regime. The numerically challenging problem of resolving droplets and bubbles in a simulation [27] could yield a more accurate description of the rarefaction waves.…”

Irradiation of materials with short, intense ion pulses at NDCX-II

“…This degree of damage is consistent with the (relatively low) melting point of tin (505 K), the latent heat of fusion (melting) of 58.5 J/g and the energy deposited by the ion pulse of about 0.4 mJ/cm 2 . We are presently exploring the dynamics of the disruptions due to rapid heating using a 3D multi-physics multi-material code including the effect of surface tension (Liu et al, 2017).…”