Modelling approaches to acoustic cavitation in transmission pipelines

摘要: Abstract A general treatment of acoustic cavitation was presented, including both fluid dynamics instabilities that can occur at inception as well non-equilibrium thermal and mechanical effects during bubble dynamics. Different approaches to modelling were considered compared. novel barotropic model has been developed, based on the partial differential equations governing mass-conservation momentum balance. The taken a homogenous mixture pure liquid, its vapor quantity gas, dissolved undissolved. analytical expression for source term driving carried out by means energy conservation equation formula sound speed in homogeneous bubbly flows derived. recently developed conservative, implicit, high-resolution, second-order accurate numerical scheme applied solve pipe flow. resultant computational algorithm assessed through comparison with experimental data referring system made up connecting two constant-pressure reservoirs water. predictions examined discussed order underline most interesting fluid-dynamic phenomena, such shock waves arising collapse. influence frequency-dependent friction simulation pressure wave presence also analyzed discussed.