Abstract
Effect of nanoparticles on solidification within a duct with multi air layer was scrutinized in current research. Impose of wavy canal and nanoparticles can augment the solidification rate and these factor were checked in current unsteady modeling. Exergy drop and solid fraction distributions were analyzed. As mass of liquid reduces, exergy drop declines and impose of sinusoidal wall can augment the exergy drop. Cold air make the liquid PCM convert to solid and its temperature augments. With use of sinusoidal wall, better exchange of heat occurs and solidification occurs in lower time. Air temperature reduces as mass of liquid decreases and same behavior was reported for temperature of NEPCM. At t = 1.4hr, Tair of two cases were the same and after this time, temperature of flat plate is greater than another case. After full solidification, temperatures of air for two cases become equal. Solidification time reduces about 26.6% with utilizing wavy surface.