Bubble dynamics in fluids with N-body simulations

Abstract

We present a new approach to studies of bubble dynamics in fluids. Relying on particle-based simulations, this method is general and suitable for cases where the commonly used perfect fluid description fails. We study expanding true vacuum bubbles surrounded by free or self-interacting particles and quantify how self-interactions affect the terminal bubble wall velocity. We find that, for sufficiently strongly self-interacting fluids, local thermal equilibrium is maintained around the bubble wall and the fluid profile is similar to that obtained with the perfect fluid description.

9 pages, 8 figures

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Cited by in corpus (9)

• Cosmological phase transitions: from perturbative particle physics to gravitational waves
• Primordial black holes from strong first-order phase transitions
• Gravitational waves from bubble collisions and fluid motion in strongly supercooled phase transitions
• Model-independent bubble wall velocities in local thermal equilibrium
• Supercool subtleties of cosmological phase transitions
• Hydrodynamical constraints on bubble wall velocity
• Logarithmically divergent friction on ultrarelativistic bubble walls
• Bounds on the bubble wall velocity
• Bubble expansion at strong coupling