Shock Induced Nanobubble Collapse Near Silica Surface: A Billion-Atom Molecular Dynamics Study

Shock-induced nanobubble collapse generates extreme pressures and temperatures that can cause cavitation erosion near solid interfaces. Building on prior single-bubble billion-atom reactive molecular dynamics simulations [1], we study empty nanobubbles in water near an amorphous silica slab for three configurations: collinear, triangular, and 3-on-1 cluster geometries that probe multi-bubble interactions during collapse. From the simulations, we examine water velocity fields to track jet formation and interactions between neighboring bubbles, relating these flow patterns to local pressure buildup and surface deformation. These results will connect the fluid motion observed during collapse to the onset of mechanical and chemical changes at the silica interface.