Carbon nanotubes (CNTs)-based flow between two spinning discs with porous medium, Cattaneo–Christov (non-Fourier) model and convective thermal condition

Inspired by various applications (ocean’s renewable power technologies, spinning disc reactor, engineering systems, etc.) of fluid flow between rotating disc, we have investigated magnetohydrodynamic flow of multi-wall and single-wall carbon nanotubes (MWCNTs and SWCNTs)-based fluid between two rotating, coaxial and parallel stretching discs with porous medium and convective thermal condition. The non-vanishing relaxation time in the dissipative process is assumed. The energy equation is developed by using Cattaneo–Christov heat flux model. ND-Solve command of MATHEMATICA software is used for the numerical solution of the governing equations. The physical behaviour of axial, radial and tangential velocity along with temperature of nanofluid is discussed in detail. When porous permeability parameter is small, then tangential velocity of MWCNTs-based fluid is higher than that of the SWCNTs-based fluid. Moreover, when porous permeability parameter is small, the Reynolds number retards the tangential velocity but when porous permeability parameter is large, Reynolds number boots the tangential velocity up.