Numerical investigation of the fullerene and doped fullerene effects on thermal performance of water base-fluid

In this study, the fullerenes have inserted into water base-fluid to investigate the atomic and thermal behavior of nanofluid and hybridnanofluid as heat transfer fluid. This choice derives from low cast and high thermal stability of this nanostructure. Our computational results from Molecular Dynamics (MD) simulations indicate that the addition of nanoparticles with ۴% atomic ratio produced an appreciable effect on the nanofluid. The maximum value of density, velocity, and temperature profile have reached to ۰.۰۲۹ atom/Å۳, ۰.۰۰۵ Å/ps, and ۳۲۱ ̊C. Its thermal conductivity would increase to ۰.۸۲ W/m.K. Heat flux reache to ۲۰۱۹ KW/m۲ after t=۱۰ ns. Also, the aggregation phenomenon detected after t= ۵.۸۴ ns. This hybridnanofluid has used to enhance the energy efficiency of the heat exchangers at high temperature for the nuclear industry applications for the first time. Numericaly, by the temperature increase of nanofluid structure to ۶۲۵.۱۵ K, thermal power of nanofluid reache to ۳۸۸۱ MW. The thermal Performance of hybridnanofluid can be improved by more than ۳۰% by adding concentration of fullerene and doped fullerene at ۴ vol%.