Theoretical Study o f Steady Three Dim ensional Stagnation Point Flow o f Micropolar Nanofluid Past a Cylinder.

Abstract

A fluid which consists of (1–100 nm) sized particles is called Nano-fluid. Nanofluids are engineered colloids made of a (1–100 nm) nanoparticles and base fluid (water). This is proved by the experiments which the thermal conductivity of nanofluids are greater as compare to the base fluids. Choi [1] was the first person who addressed about nanoparticle. Buongiorno [2] studied about the convective transport in nanofluids and gave a theoretical model. Main topic of studies which focus on the natural convection in inclusions having magnetic depicts have pondered an electrically conducting fluid with less thermal conductivity. Various interests of recent specialists are achieved by the nanofluids. In the real life, the common use of nanoparticles in nanofluids made of metals, carbon nanotubes oxides or carbides. Nanofluid is the combination of nanoparticles (including metals e.g. gold and copper, metal oxides e.g. alumina, zirconia, silica and titania, oxide ceramics e.g. 𝐴𝑙2𝑂3 and 𝐶𝑢𝑂, metal carbides e.g. 𝑆𝑖𝐶, metal nitrides e.g. 𝑆𝑖𝑁, 𝐴𝐼𝑁, carbon e.g. graphite) and base fluids (including water, oils, biofluids, polymeric solutions, organic liquids e.g. ethylene, triethylene-glycols, refrigerants etc.). Actually, fluid is used in various engineering and industrial processes. The several applications of the nanofluids are used very common in the fields of communication, electronics, high-power x-rays, optical devices, material processing, laser etc. Some recent researches on the flow of nanofluids are experimented [3−4]. Nadeem and Lee [5] have been enlarged the idea of nanofluid over an exponentially stretching sheet. A subclass of microfluidic is called micropolar fluid, the idea was addressed by Eringe [6,7]. The natural convective flow model of micropolar nanofluid was presented by Bourantas et al. [8]. Buongiorno [9] was worked on convective transport in nanofluids. Most