Abstract
To achieve greater productivity of discharging process is storage system, the geometry of container and features of working material have been improved in current work with installing fins and loading nanoparticles, respectively. Three radiuses for alumina nanoparticles with two amounts of concentration have been selected for managing various cases of simulations. The features of NEPCM were estimated with considering single phase approximation and mathematic model was derived with considering theory of overlooking velocity of NEPCM. The grid style was altered for each time periods according to position of solid layer. The good accuracy of utilized code has been reported in validation section. The freezing time changes from 2013.32 s to 1273.41 s with adding nanoparticles with optimized diameter and concentration of 0.04. As radius changes from 15 nm to 20 and 25 nm, the needed time at first declines around 17.07 % and then it increases around 16.43 %. The efficacy of ϕ for radius of 20 nm is much greater other sizes.
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