Embedded microneedle fin chip heat dissipation design and simulation Zhiyuan Wu, Guo Ye, Jinsong Peng, Zhenzhi He and Xiangning Lu Eur. Phys. J. Plus, 140 7 (2025) 685 Published online: 22 July 2025 DOI: 10.1140/epjp/s13360-025-06637-x