Heat and mass transfer study of hydrocarbon based magnetic nanofluid (C1-20B) with geothermal viscosity.

The prime concern of the present investigation includes a numerical approach targeting the study of heat and mass transfer for the flow of magnetic nanofluid based on hydrocarbon (C1-20B) past a rotating porous disk taking into cognizance the various parameters present. The modelled system of equations for the unsteady flow is rendered into the dimensionless non-linear system of differential equations, via suitable transformations. The modelled system of dimensionless equations is numerically solved by MATLAB bvp4c solver. The influence of involved emerging parameters, namely permeability, viscosity variation, rotation, radiation, ferrohydrodynamic interaction, thermophoresis, and Brownian motion parameters on flow regimes has been studied and shown graphically. Moreover, numerical data of the rate of heat and mass transfer and coefficients of skin friction are also mentioned in tabular form. It is found that the tangential velocity is reduced for increasing the value of viscosity variation parameters. The fluid temperature profile shows an increment when we increase the rotation of the disk. [ABSTRACT FROM AUTHOR]