The performance evolution of hybrid nanofluid flow over a rotating disk using Cattaneo–Christov double diffusion and Yamada–Ota model

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The article addresses the problem related to Darcy–Forchheimer flow past a rotating disk with radial stretching and shrinking. The effects of viscous dissipation, convective heating and heating due to porous medium are considered; the heat and mass transfer expressions are modeled according to Cattaneo–Christov double diffusion theory. Additionally, a carbon nanotubes-based hybrid nanofluid is taken as working fluid. The mathematical model for existing problem is quite complex which is reduced to a simpler form (non-dimensional) by utilizing Von-Kármán similarity transformation. Then, these non-dimensional expressions are solved using Runge–Kutta–Fehlberg technique via shooting method. The impact of the sundry variables is illustrated via both graphs and tabular data, and the same is explained in detail. The result elucidates that the thermal boundary layer width of stretching rotating and shrinking rotating disks increase by rising the porosity parameter, Eckert number and thermal relaxation parameter. Moreover, a hike in the value of thermal relaxation parameter from 0.1 to 0.4 causes a reduction of 22.36% in heat transfer rate in stretching rotation, whereas a boost in the value of solutal relaxation parameter from 0.2 to 0.8 is responsible for 4.24% and 0.54% increment in mass transfer rate in stretching rotation and shrinking rotation, respectively.