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Present study explores the discussion on combined effects of Joule heating and viscous dissipation on a three-dimensional flow of Oldroyd B nanofluid. The model describes that flow is generated by bidirectional stretching sheet with thermophoresis and Brownian motion effects and also energy equation contain radiation term. Converted self similar equations are solved via shooting algorithm with RKF 45 method. The influences of Joule heating and viscous dissipation are discussed through graphs. It is noticed that combination of Joule and viscous heating, the temperature of Oldroyd B nanofluid profile increases. Keywords: Three-dimensional flow, Oldroyd B nanofluid, Joule heating, Viscous dissipation, Thermal radiation

The combined effects of nonlinear thermal convection and radiation in 3D boundary layer flow of non-Newtonian nanofluid are scrutinized numerically. The flow is induced by the stretching of a flat plate in two lateral directions. The mechanism of heat and mass transport under thermophoretic and Brownian motion is elaborated via implementation of the thermal convective condition. The prevailing two-point nonlinear boundary value problem is reduced to a two-point ordinary differential problem by employing suitable similarity transformations. The solutions are computed by the implementation of homotopic scheme. At the end, a comprehensive parametric study has been conducted to analyze the typical trend of the solutions. It is found that the nanoparticle volume fraction and temperature profiles are stronger for the case of solar radiation in comparison with problem without radiation. Keywords: Non-linear convection, Nonlinear density temperature (NDT), Nonlinear thermal radiation, Three dimensional flow, Maxwell fluid, Nanoparticles