Hydrodynamics of disturbed flow and erosion–corrosion. Part II — Two‐phase flow study

Abstract

AbstractErosion–Corrosion in turbulent, two‐phase liquid/particle flow with recirculation, after a sudden pipe expansion is studied by the application of a numerical flow model along with two different erosion models. The flow model, which is based on a two‐phase flow version of a standard two‐equation model of turbulence and a stochastic simulation of particle‐fluid turbulence interactions, is capable of successfully predicting local values of time averaged fluid velocities and turbulent fluctuations, as well as predicting particle dispersion and particle‐wall interaction. The erosion models used are that of Finnie (1960) and a modified version suggested by Bergevin (1984).The agreement of the predicted and measured hydrodynamic parameters, for flow through a sudden expansion, was satisfactory. Predictions of erosion rates using Bergevin's modified model were in good agreement with the stainless steel erosion measurements for a 2% water/sand slurry flow. The erosion–corrosion model was successful in predicting the overall pattern and rates of metal loss for carbon steel.