Abstract
In this article, flow and heat transfer effects of both single and multiple wall carbon nanotubes within the base fluid (water) are analyzed between two rotating plates. Moreover, we have considered that the upper wall of the channel is permeable while the lower wall is moving with variable velocity to produce the forced convection along with the Coriolis and centripetal forces with the rotation of fluid. The compatible transformations have been used to construct the non-dimensional system of governing equations. Numerical simulation is performed to obtain the solutions structure. Thermophysical properties of each base fluid and nano particle are incorporated in the form of thermal conductivity, viscosity, density, specific heat, nanoparticle volume fraction and Prandtl number to attain the solution of the model. It is found that water based single wall carbon nanotubes (SWCNTs) produce less drag and high heat transfer rate as compared to the water based multiple wall carbon nanotubes (MWCNTs). Influence of rotation causes the drag increase and decreases the Nusselt number irrespective of the other pertinent parameters. Moreover suction/injection plays an important role in determining the peak position of velocity. The effect of suction/injection is shown through plotting streamlines. (C) 2015 Elsevier B.V. All rights reserved.