Application and experimental validation of a CFD based erosion prediction procedure for jet impingement geometry

Computational Fluid Dynamics (CFD) based erosion prediction procedures are carried out to predict erosion for a submerged liquid jet impingement geometry. 3-D modeling with different near wall treatments are employed to simulate the wall bounded turbulent jet flow. Discrete Phase Model (DPM) is applied to track particles and obtain particle impact characteristics. Erosion is calculated using typical erosion ratio equations in the literature (Zhang et al., 2009) [1]. In this paper, two categories of near wall modeling approaches (wall functions and near wall models) are presented and examined. Particle impact parameters are extracted and compared with measured data to determine the most accurate near wall modeling approaches. A procedure for grid refinement particular for erosion simulations is proposed and followed by uncertainty analysis from the CFD predictions. Experimental data with uncertainty quantified for 300 μm large particles and 25 μm small particles are utilized to validate the proposed procedure. It is shown that following the proposed procedure yields very good erosion prediction from CFD regardless of particle size.