In this research, numerical simulation is examined for nanofluid hydrothermal treatment during solidification. Time dependent mesh has been utilized. Various shapes of CuO nanoparticles are dispersed in water. Solid fraction and isotherm contours are shown for several values of fin length, radiation parameter and shape factor. Results demonstrate that minimum solidification time has been obtained for Platelet shape. Solid faction improves with increase of radiation parameter. (C) 2018 Elsevier Ltd. All rights reserved.