Jet formation from bubbles near a solid boundary in a compressible liquid: Numerical study of distance dependence

Bubble expansion and collapse in a Newtonian liquid is studied numerically for a range of dimensionless initial distances from a solid boundary. Bubbles farther from the solid develop the well-known microjet during collapse. However, for bubbles very close to the solid, a different jet mechanism leads to the formation of very fast, thin jets. The results are relevant for a better understanding of cavitational erosion.