Investigations into the law of sand particle accumulation over railway subgrade with wind-break wall Ning Huang, Kang Gong, Bin Xu, Jian Zhao, Hongchao Dun, Wei He and Guowei Xin Eur. Phys. J. E, 42 11 (2019) 145 Published online: 20 November 2019 DOI: 10.1140/epje/i2019-11910-0