Investigation of cavitation noise using Eulerian-Lagrangian multiscale modeling

Numerical investigation of effect of geometric parameters on performance of rotational hydrodynamic cavitation reactor

“…Hydrodynamic cavitation (HC) is a rapid phase-change phenomenon with inception, growth, and subsequent collapse caused by local pressure drop [1] , [2] , [3] . During the process of bubbles collapse, an enormous energy consisting of mechanical effect, thermal effect, and chemical effect is released into the surrounding fluids [4] , [5] , [6] , which usually has undesirable and unavoidable effects on hydraulic machinery, e.g., increased vibration, increased noise, and deterioration of efficiency [7] , [8] , [9] , [10] , therefore, extensive research has focused on preventing cavitation or reducing its destruction [11] , [12] , [13] . However, with the in-depth research and understanding of cavitation phenomena, it has been found that the high turbulence and high energy associated with the collapse of bubbles also offer wide applications.…”

Numerical investigation of partial cavitation in a Venturi tube by Eulerian-Lagrangian multiscale modelling

“…Ganesh et al [12] employed high-speed visualization method and time-average X-ray density measurement to investigate the local cavitation phenomenon, and determined the mechanism of bubbly shock wave. By combining the volume of fluid (VOF) with the discrete bubble model (DBM), Li et al [13,14] established a multi-scale model to predict the partial cavitation in a convergent-divergent tube.…”

LES investigation of the wavy leading edge effect on cavitation noise

“…Hydrodynamic cavitation is common in fluid machinery, such as hydrofoils [3] , [4] , [5] , [6] , [7] , marine propellers [8] , venturi tubes [9] , [10] , [11] , water treatment reactor [12] , [13] , [14] . It can lead to various issues, including vibration [15] , noise [16] , [17] , [18] , [19] , [20] , [21] , pressure fluctuations [22] , [23] , and cavitation erosion [24] . In contrast, hydrodynamic cavitation can be employed to improve the reaction efficiency for various chemical and environmental applications, such as water disinfection [25] , [26] , [27] , delignification [28] , dye degradation [29] , preparation of supercapacitors [30] .…”