Modeling of dendrite arm fragmentation and dendrite arm coarsening⋆ Hui Fang, Hua Xue, Qingyu Zhang, Shiyan Pan, Mengdan Hu and Mingfang Zhu Eur. Phys. J. E, 43 7 (2020) 44 Published online: 08 July 2020 DOI: 10.1140/epje/i2020-11968-5