Gyrotactic bioconvection flow of a nanofluid past a vertical wavy surface

In this paper bioconvection flow with heat and mass transfer of a water-based nanofluid containing gyrotactic microorganisms over a vertical wavy surface is investigated. The coupled nonlinear set of equations comprised of velocity, temperature, nanoparticle concentration and density of microorganisms is solved numerically by using implicit finite difference method. Flow characteristics are obtained in terms of skin friction coefficient, Nusselt number, Sherwood number and density number of microorganisms coefficient and are presented graphically by varying several controlling parameters. Interesting observations are recorded for the parameters: a, Nr, Lb and Rb. It is observed that the amplitude of the wavy surface has pronounced influence on the rates of heat and mass transfer, skin friction coefficient and density number of the microorganisms coefficient and all these quantities get augmented as the amplitude increases. (C) 2016 Elsevier Masson SAS. All rights reserved.