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Lookup NU author(s): Dr Sadaf MaramizonouzORCiD,
Dr Sadegh NadimiORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
The process of applying sand particles to increase the traction between wheel and rail is reported to be less than 20% efficient. To better understand entrainment efficiency, the process is simulated using the Discrete Element Method. The simulation results are validated against full-scale experimental observations in terms of entrainment efficiency and particle velocity for ten case studies with different positioning of the sand nozzle. The numerical simulations confirm the experimental observations wherein the highest efficiency can be achieved when the sander is aimed at the wheel/rail nip. When aiming the sander at the wheel, the values of entrainment efficiency from simulations and experiments show some discrepancy which can be related to the numerical assumptions. Calculating coefficients of traction between the rail and wheel from the simulation data for the four cases of an un-sanded contact, and with the sander aimed at the rail, the nip, and the wheel (all with the same angle) show an increase in the coefficient of traction for all sanded cases compared to the un-sanded case.
Author(s): Maramizonouz S, Nadimi S, Skipper W, Lewis S, Lewis R
Publication type: Article
Publication status: Published
Journal: Computational Particle Mechanics
Pages: epub ahead of print
Online publication date: 17/05/2023
Acceptance date: 20/04/2023
Date deposited: 17/05/2023
ISSN (print): 2196-4378
ISSN (electronic): 2196-4386
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