Magnetic field analysis in a suspension of gyrotactic microorganisms and nanoparticles over a stretching surface

•Two dimensional MHD flow in a suspension of gyrotactic microorganisms and nanoparticles over a stretching surface is discussed first paper in literature.•Governed problem for proposed model solved numerically using fourth-order Runge–Kutta–Fehlberg method.•Good agreement in comparison with previous studies.•Tabulated physical quantities and graphics of all flow profiles.•Graphics of reduced skin friction coefficient, when the different flow parameters vary.

The combine effects of magnetic field bioconvection, Brownian motion and thermophoresis on a free convection nanofluid flow over a stretching sheet containing gyrotactic microorganisms are investigated. The self-similar Buongiorno model is analyzed first time for stretching sheet numerically. The present results are compared with available data and are found in an excellent agreement. Pertinent results are presented graphically and discussed quantitatively with respect to variation in bioconvection parameters.