Modeling and computation of the cavitating flow in injection nozzle holes

Abstract

Cavitating flows inside a diesel injection nozzle hole were simulated using a mixture model. A two-dimensional (2D) numerical model is proposed in this paper to simulate steady cavitating flows. The Reynolds-averaged Navier–Stokes equations are solved for the liquid and vapor mixture, which is considered as a single fluid with variable density and expressed as a function of the vapor volume fraction. The closure of this variable is provided by the transport equation with a source term Transport-equation based methods (TEM). The processes of evaporation and condensation are governed by changes in pressure within the flow. The source term is implanted in the CFD code ANSYS CFX. The influence of numerical and physical parameters is presented in detail. The numerical simulations are in good agreement with the experimental data for steady flow.

3D Analyze of the Cavitation Mechanism in Turbulent Flow using Partially-Average Navier Stokes Model around the Clark-y Hydrofoil

“…where m + and mare the mass transfer rate for the production and the destruction of the liquid. In this study, the (Kanfoudi, 2011, Kanfoudi, 2015, Kanfoudi and Zgolli, 2014 model is employed. The mass transfer of the TEM are :…”

“…In this paper, we are interested to investigate numerically in 3D the unsteady cavitating flow based on the transport equation model (TEM) with source term (Kanfoudi, 2015). For turbulence modeling, we used the SST-PANS model.…”

Numerical Analysis of the Turbulent Flow Structure Induced by the Cavitation Shedding using LES

“…with : This cavitation model, which is based on the modified model of Rayleigh Plesset, has been validated in many cases, such as cavitating flow around a 2D hydrofoil (Kanfoudi 2012;Kanfoudi 2011;Kanfoudi 2015) and 3D hydrofoil (Kanfoudi 2014).…”

“…Based on (ITTC 1999) , four technique has been employed, Interface-tracking methods ( (Hutton, R.A.;Furness 1975), Heister 1994) , (Deshpande, M.;Feng, J.;Merkle 1998) (Koop 2008;Kozubková, Rautová, and Bojko 2012), (Zwart, P.J. ;Gerber, A.G.;Belamri 2004) and (Kanfoudi 2011(Kanfoudi , 2012(Kanfoudi , 2014(Kanfoudi , 2015 For (Kunz et al 2003) . Owing to their success in capturing the features of cavitation flows, the (Kanfoudi 2011) cavitation model is used in the present paper.…”

“…The present study investigates cavitating flows around a three-dimension NACA0009 hydrofoil using the (Kanfoudi 2011) (Kanfoudi 2015) cavitation model coupling with LES. The interactions between the cavitation and the vortex formation.…”