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POLYMER DYNAMICS, RHEOLOGY AND FLOW

Part III: Effect of Polymer on Inertial and Elastic Turbulence
2pm Fri Sept 26 SUPA VC Rooms

The first part of this talk will discuss how very small concentrations of polymer can drastically reduce drag in wall-bounded turbulence. A simplified model of the structures in wall-bounded turbulence is used to capture the essence of the physical mechanism of drag reduction, which indicates that of key importance is the resistance of polymer molecules to stretching in biaxial kinematics. The second part of the talk will describe experimental work exploring a cascade of transitions leading from simple shear flow to "elastic turbulence" in polymer solutions at low-Reynolds number.

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