Modeling cavitation flow of cryogenic fluids with thermodynamic phase-change theory

Abstract

Cavitation is the formation of vapor bubbles within a liquid where the flow dynamics causes the local static pressure to drop below the vapor pressure. The so-called full cavitation model (FCM) developed by Singhal has been widely used in numerical modeling of the cavitation flow for thermosensible and non-thermosensible fluids. Within the FCM, the bubble size is taken to be equivalent to the maximum possible value to forego the calculation of bubble number density. We developed a new cavitation model by re-calculating the bubble radius in FCM to account for the effects of local pressure.

Calculation and verification of dynamical cavitation model for quasi-steady cavitating flow

“…Combing the two equations finally leads to the following expressions relating the local pressure and the bubble radius. Details regarding the details of the derivation can be found elsewhere [25,26].…”

Numerical investigation of cavitation-vortex interaction in a mixed-flow waterjet pump

“…Thus, numerous studies have been conducted to predict cavitating flows accurately by focusing on various research objects such as Francis turbines [7], hydrofoils [8], centrifugal pumps [9,10], cryogenic fluids [11], marine propellers [12,13], and waterjet propulsors [14][15][16][17]. Rhee et al [18] found that cavitation inception and cavity shape in a marine propeller could be predicted well using an unstructured grid, which demonstrated the feasibility of cavitation simulation based on Reynoldsaveraged Navier-Stokes (RANS) method.…”

Cavitation shedding dynamics around a hydrofoil simulated using a filter-based density corrected model

“…The simulation of cavitating flows is a challenging problem as it is quite complicated, involving fully developed turbulent flow [9][10][11][12]. The interaction between cavitation and turbulence is not completely understood yet.…”