Abstract
This paper numerically studies the Stokes flow for a nano fluid with three different nanoparticle void fractions (2.5%, 5% and 7%) inside a straight and smooth micron size nozzle. Flow inside micron size nozzles is characterized by Reynolds number (Re) that remains less than unity (Stokes or creeping flows). In the literature there exist experimental results that validate the macroscopic flow theory inside micron size flow channels, however in most cases the Reynolds number for these experiments were not less than unity which is the essence of Stokes flow. In this study flow inside a micron size nozzle is numerically investigated at (0.001 ≤ Re ≤ 0.1) in order to verify the macroscopic Stokes theory. The effect of Reynolds number, particle size and particle concentration has been studied. It is found that even at these Reynolds number the flow of nanofluid inside a micron size nozzle follows the macroscopic theory of fluid mechanics.