Simultaneous melting and solidification of a columnar dendritic microstructure in a temperature gradient: Numerical modeling and experiments⋆Chongchen Xiang, Qingyu Zhang, Dongke Sun, Shunhu Zhang, Mingfang Zhu and Markus RettenmayrEur. Phys. J. E, 43 1 (2020) 5DOI: https://doi.org/10.1140/epje/i2020-11930-7