The study of heat transfer enhancement due to various nanofluids between rotating stretchable disks

In this paper, the convective flow of various nanofluids (Cu, CuO, Al2O3, TiO2, Fe3O4) across rotating stretchable disks has been investigated theoretically. Stretchable disks are maintained with uniform constant angular velocities. The similarity transformations are used to non-dimensionalize the governing equations and then solved numerically. The computational results are depicted graphically and discussed for various physical parameter. It is worthy to mention the important observation in this investigation that higher temperature is taken place for Al2O3 or TiO2. The influence of Re, Prandtl number, stretching parameter and rotating parameter on radial, tangential and temperature profiles are presented with the assist of graphs. Increasing the values of ϕ leads to enhance Nusselt number (rate of heat transfer) and skin friction coefficient along both the disks. Skin friction coefficient remains constant for increasing values of Prandtl’s number where as Nusselt number increases at both disks. Tangential velocity and temperature profiles increases for increasing values of rotation parameter (Ω). Increasing stretchable disks parameter exhibits reverse trend behaviour on physical quantities at different disks. For higher values of ϕ radial velocity decreases up to η = 0.5 and then increases.