Unsteady MHD flow of heat and mass transfer of nanofluids over stretching sheet with a non-uniform heat/source/sink considering viscous dissipation and chemical reaction

In this paper, unsteady MHD flow of heat and mass transfer of Cu-water and TiO2-water nanofluids over stretching sheet with a non-uniform heat/source/sink considering viscous dissipation and chemical reaction is investigated. The governing partial differential equations with the corresponding boundary conditions are transformed to a system of non-linear ordinary differential equations and solved using Keller box method. The velocity, temperature and concentration profiles are obtained and the influences of various relevant parameters, namely the magnetic parameter, M Prandtl number Pr, Eckert number Ec, Schmidt number Le, chemical reaction parameter K, unsteadiness parameter S and the Soret number Sr on velocity, temperature and concentration profiles are discussed. The skin-friction coefficient- f"(0) , heat transfer coefficient - theta'(0) and mass transfer coefficient -phi'(0) are presented in tables. A comparison with published results is also presented and found in good agreement.