  We investigate the process of cloud cavitation collapse through large-scale
simulation of a cloud composed of 12500 gas bubbles. A finite volume scheme is
used on a structured Cartesian grid to solve the Euler equations, and the
bubbles are discretized by a diffuse interface method. We investigate the
propagation of the collapse wave front through the cloud and provide
comparisons to simplified models. We analyze the flow field to identify each
bubble of the cloud and its associated microjet. We find that the oscillation
frequency of the bubbles and the velocity magnitude of the microjets depend on
the local strength of the collapse wave and hence on the radial position of the
bubbles in the cloud. At the same time, the direction of the microjets is
influenced by the distribution of the bubbles in its vicinity. Finally, an
analysis of the pressure pulse spectrum shows that the pressure pulse rate is
well captured by an exponential law.
