One of the branches of fluid mechanics is Newtonian fluid in which fluid flow is linear and passes through the origin. Sir Isaac Newton was the first mathematician who defined the flow performance of the fluid. In a Newtonian fluid, shear stress is directly proportional to shear rate and viscosity remain constant. Its twist depends upon a time. Fluids tend to defy the pace of deformation. In other words, Fluids can be determined, If slower or faster respectively. There are so many examples of NF (Newtonian fluid) like water, mineral oil, Gasoline, and Alcohol.