), a low Grashof number implies weak convection. Apparently, since the characteristic length, L (diameter or length of the nanoparticle) is in the order of nanometer, the Grashof number is very low and the contribution of convection to heat transfer can be deemed negligible. However, the motion of the fluid around the nanoparticle is an important aspect to investigate. Thus, in the present study, the energy equation with the convective terms is implemented, which can be written as follows: