Open Access
A model for the investigation of two-phase erosion-corrosion in complex geometries
Reads0
Chats0
TLDR
In this paper, a combination of PHOENICS CFD code and the particletracking code predictions of erosion, corrosion and erosion-corrosion in a two-dimensional 180 degree bend and a three-dimensional square-sectioned U-bend are presented.Abstract:
Erosion-corrosion is accelerated corrosion following the removal of protective films. In the past, the majority of erosion-corrosion research has been undertaken using experimental methods. Today, numerical methods provide researchers with an addition tool for investigation. The commercial computational fluid dynamics (CFD) code PHOENICS has been used to predict hydrodynamic flow fields and mass transfer rates at high Schmidt numbers (Sc = 520 and Sc = 1460) characteristic for corrosion. The ktwo-equation eddy-viscosity model for turbulence has been used. To allow for integration through the viscous sub-layer, LamBremhorst low Reynolds number damping functions were used. Hydrodynamic flow fields and mass transfer rates have been verified against experimental results. Mass transfer rates were directly converted into corrosion rates assuming limiting mass transfer control. A numerical particle-tracking code has been developed independently. The effect of turbulence on particle motion has been accounted for by the use of an eddy interaction model. Particle dispersion and tracking tests have been performed on the particle-tracking code to validate the Eulerian statistics. Two erosion models have been integrated into the code and verified against experimental data. Using a combination of the PHOENICS CFD code and the particletracking code predictions of erosion, corrosion and erosion-corrosion in a two-dimensional 180 degree bend and a three-dimensional squaresectioned U-bend are presented (Re = 5.67 × 104, Rc/D = 3.35). The effect of particle inertia (hollow glass, sand and copper particles), Reynolds number (Re = 2.1×104, Re = 5.67×104, Re = 1.0×105) and bend orientation (upwards-facing and downwards-facing) on erosion rates, and the effect of diffusivity (Schmidt number) on mass transfer were investigated.read more
Citations
More filters
Journal ArticleDOI
Numerical Prediction of Erosion-Corrosion in Bends
Anthony Keating,Srdjan Nesic +1 more
TL;DR: A combination of computational fluid dynamics (CFD) and Lagrangian particle tracking has been used to predict two-phase erosion-corrosion in a three-dimensional, square-sectioned U-bend as mentioned in this paper.
Journal ArticleDOI
Modelling of erosion–corrosion in practical geometries
Cian Davis,Patrick J. Frawley +1 more
TL;DR: In this paper, the authors used the Sherwood number independent grids to predict erosion-corrosion wear in a contracting-expanding geometry and validated the predicted wear profile with experimental results.
Journal ArticleDOI
Three-dimensional multispecies current density simulation of molten-salt electrorefining
Sungyeol Choi,Jaeyeong Park,Kwang-Rag Kim,HyoSook Jung,Il-Soon Hwang,Byung-Gi Park,Kyung-Woo Yi,Han-Soo Lee,Do-Hee Ahn,Seungwoo Paek +9 more
TL;DR: In this paper, the results of local fluid dynamics are coupled with one-dimensional electrochemical reaction analysis code in order to predict local current density distribution, and the results show a good agreement with general principle of mass transfer observations.
Prediction of two-phase erosion-corrosion in bends
Anthony Keating,Srdjan Nesic +1 more
TL;DR: In this article, a numerical particle tracking code has been developed independently in order to predict erosion, corrosion and erosioncorrosion in a three-dimensional square-sectioned U-bend.
Proceedings ArticleDOI
Prediction of erosion in a solid rocket motor by alumina particles
Hod Wirzberger,Sara Yaniv +1 more
TL;DR: In this article, the authors developed a model for mechanical and thermal erosion to obtain an improved prediction of the standard ablation prediction models, which can be used to replace the empirical correction factors by more accurate predictions based on the real physical process of erosion leading to increased observed ablation rates.
References
More filters
Book
Computational methods for fluid dynamics
Joel H. Ferziger,Milovan Perić +1 more
TL;DR: This text develops and applies the techniques used to solve problems in fluid mechanics on computers and describes in detail those most often used in practice, including advanced techniques in computational fluid dynamics.
Computational geometry. an introduction
TL;DR: This book offers a coherent treatment, at the graduate textbook level, of the field that has come to be known in the last decade or so as computational geometry.
Journal ArticleDOI
A calculation procedure for heat, mass and momentum transfer in three-dimensional parabolic flows
S.V. Patankar,D. B. Spalding +1 more
TL;DR: In this article, a general, numerical, marching procedure is presented for the calculation of the transport processes in three-dimensional flows characterised by the presence of one coordinate in which physical influences are exerted in only one direction.
Book
Convective Heat and Mass Transfer
W. M. Kays,J. H. Whitelaw +1 more
TL;DR: In this article, the echangeurs de : chaleur, couche de : limite, modeles de : turbulence, transfert de masse reference record created on 2005-11-18, modified on 2016-08-08
Book
Computational Geometry: An Introduction
TL;DR: In this article, the authors present a coherent treatment of computational geometry in the plane, at the graduate textbook level, and point out the way to the solution of the more challenging problems in dimensions higher than two.