Simulation of solid particle erosion in WC-Ni coated wall using CFD

• Published in: Journal of materials processing technology 2015-10, Vol.224, p.240-245
• Main Authors: Kim, Jae Hyung, Joo, Hyung Goun, Lee, Kang Yong
• Format: Article
• Language: English
• Subjects: Accuracy; Coating; Computational fluid dynamics; Computational fluid dynamics (CFD); Computer simulation; Durability prediction; Erosion; Mathematical models; Shear stress; Solid particle; Transport
• ISSN: 0924-0136
• DOI: 10.1016/j.jmatprotec.2015.01.022

•The CFD analysis is conducted and compared with erosion test results.•WC-Ni coated specimens with and without boron element are tested.•The k–ɛ model and the SST model based on the Finnie erosion model are analyzed.•The SST model is closer to the experimental result than k–ɛ model.•The erosion rate is increased due to hardness increase when the boron element added. The computational fluid dynamics (CFD) simulation was conducted and compared with the erosion results tested by impacting solid particles under air jet on the WC-Ni coated specimens with and without boron element. The coating thickness and air jet velocity were 1mm and 30±2m/s, respectively. The simulation is done with the two turbulence models, namely the k–ɛ (k–epsilon) model and the shear stress transport (SST) model based on the Finnie erosion model. The simulation result from the SST model gives better accuracy than that from the k–ɛ model, comparing with the experimental results. It was considered that the transport of turbulent shear stress affects accuracy.