Simultaneous influences of mixed convection and nonlinear thermal radiation in stagnation point flow of Oldroyd-B fluid towards an unsteady convectively heated stretched surface

Here stagnation point flow of an Oldroyd-B fluid towards unsteady stretched sheet is addressed. Mixed convection is present. Heat transfer is examined by considering nonlinear version of thermal radiation and Robin type boundary condition. Implementation of appropriate transformations yields nonlinear ordinary differential systems. Resulting systems have been solved for the convergent solutions. Impacts of different sundry variables on the non-dimensional velocity, temperature and local Nusselt number are scrutinized. It is anticipated that behaviors of thermal relaxation and retardation times on velocity distribution is reverse. Moreover, it is also seen that temperature ratio and radiation parameters enhance the temperature distribution.