Confined shocks inside isolated liquid volumes: A new path of erosion?
Abstract
The unique confinement of shock waves inside isolated liquid volumes amplifies the density of shock-liquid interactions. We investigate this universal principle through an interdisciplinary study of shock-induced cavitation inside liquid volumes, isolated in 2 and 3 dimensions. By combining high-speed visualizations of ideal water drops realized in microgravity with smoothed particle simulations, we evidence strong shock-induced cavitation at the focus of the confined shocks. We extend this analysis to ground-observations of jets and drops using an analytic model and argue that cavitation caused by trapped shocks offers a distinct mechanism of erosion in high-speed impacts (>rsim100ms-1).
- Publication:
-
Physics of Fluids
- Pub Date:
- October 2011
- DOI:
- 10.1063/1.3647583
- arXiv:
- arXiv:1109.3175
- Bibcode:
- 2011PhFl...23j1702O
- Keywords:
-
- cavitation;
- confined flow;
- drops;
- flow simulation;
- flow visualisation;
- jets;
- shock wave effects;
- two-phase flow;
- 47.55.dp;
- 47.80.Jk;
- 47.60.Kz;
- 47.11.-j;
- 47.40.Nm;
- Cavitation and boiling;
- Flow visualization and imaging;
- Flows and jets through nozzles;
- Computational methods in fluid dynamics;
- Shock wave interactions and shock effects;
- Physics - Fluid Dynamics;
- Astrophysics - Solar and Stellar Astrophysics;
- Physics - Space Physics
- E-Print:
- 4 page letter, 4 figures