Abstract
The process of transition from laminar to turbulent flow on a flat plate in the presence of drag-reducing polymer additives has been investigated. In particular, the effect of polymer concentration and plate inclination on the formation of turbulent spots and their subsequent growth has been studied. It is observed that polymer addition causes a delay in both onset of turbulence and complete transition. The turbulent spots are seen to move at a lower velocity in the presence of the polymer additives. Further, the pressure gradient affects the transition in polymer solutions in the same way that it does in pure water.
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