Presence of different shapes of ZrO2 nanoparticles in the melting heat transfer of a Casson flow Md Tausif Sk, Kalidas Das and Prabir Kumar Kundu Eur. Phys. J. Plus, 132 10 (2017) 425 Published online: 16 October 2017 DOI: 10.1140/epjp/i2017-11680-8