Abstract

In railway vehicles, snowpack on the bogies and underframe caused by the snow accretion can result in damage and performance degradation. To obtain reliable simulation results about snow accretion for railway vehicle, surface heat transfer should be considered. This paper shows how to predict the snow accretion on a heated surface by applying a model established on the basis of thermodynamic methodology to boundary conditions. The motion of the snow was described by adopting the Eulerian method which consists of continuity and momentum equations for snow concentration. The performance of this methodology was demonstrated by comparing the numerical and experimental results for wind tunnel testing of snow accumulation on heated surfaces. Result shows that it can be applied to various meteorological conditions of flow speed, air temperature as well as snow flux.

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