A Bingham snow model for train safety built using the Moving Particle Semi-Implicit method

Abstract

The purpose of this study is to develop a snow model emphasizing the splashing phenomenon and the impact force acting on the train surface to ensure safe driving. Snow is assumed to be a Bingham fluid due to its peculiar shear thinning. A Bingham numerical model is proposed by using the Moving Particle Semi-Implicit (MPS) method and tested for collision between a train and snow. As well, verification of this special non-Newtonian fluid is carried out and good agreement is obtained by comparing the MPS numerical result with a reference solution. Furthermore, a collision simulation between train and snow is implemented in which a natural splashing phenomenon occurs by introducing the present Bingham snow model. Finally, the time history of pressure in the foremost area of the train head is analyzed, which can provide a reference for safe train driving.