Instability and fragmentation of expanding liquid systems

摘要: This analysis pursues the underlying physics governing expansion, dispersal and breakup of a thin walled steel right circular cylinder filled with liquid after being impacted by high velocity aluminum sphere. The impact generates radially expanding coherent shell which stays together to at least diameter 8 times that original cylinder. An instability criterion is proposed developed based on opposing forces stabilizing inertial pressures destabilizing viscous resistance. compared test data where possible in order ascertain its ability predict shell. theory here predicts extensive expansion unthickened prior fragmentation as observed experiments. result lends some credence pursued onset fragmentation.