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Received: 4 June 2020 Accepted: 17 August 2020 In the current work boundary layer flow of Casson fluid over a stretched sheet is considered to analyze the heat transfer analysis in presence of viscous dissipation. The study of Casson fluid is the best study to analyze the nature of non-Newtonian fluid. The set ordinary equations are derived from the governing equations of the flow along with boundary conditions. The transformed coupled ordinary differential equations are solved numerically by using the spectral relaxation method. Later the numerical solutions are compared with exact solutions. The consequences of governing parameters on dimensionless quantities like velocity, temperature, friction factor and local Nusselt numbers are shown and discussed. Here the result shows that the Casson fluid has a propensity to decrease the velocity of the fluid due to its higher viscidness. And the fluid of relatively small Prandtl number has high temperature in the occurrence of viscous dissipation. Applications of such type of problems are obtained in the control of complex fluid materials significant to energy and biomedical systems.

Steady Boundary Layer Flow of Casson Fluid over a Nonlinear Stretched Sheet in Presence of Viscous Dissipation Using the Spectral Relaxation Method