Abstract
By applying torque, turning effects are produced on the flow of the fluids flowing between the two concentric cylinders, which have different radii and are moving in the same or opposite directions with similar or variable velocities. This kind of flow is called torsional flow. In this article, different cases are taken into account to study the variation in heat transfer for the flow of nanofluid between the two concentric cylinders. The influence of magnetic fields and nonlinear thermal radiation is also examined. After non-dimensionalizing the formulated equations, the bvp4c (boundary value problem of 4(th) order) MATLAB function is utilized to determine the impact of different parameters on flow rate and fluid temperature. The graphical interpretation helps to show the behavior of emerging parameters.