718 PIV Measurement of Drag Reducing Micro Turbulent Channel Flow
Details
The dilute solution of chain polymers or surfactants in water brings about a drastic drag reduction of wall-bounded turbulent shear flows. Some previous studies have shown that the rate of drag reduction is enhanced with decreasing pipe diameter for the same Reynolds number, indicating that the size of flow geometry can be an important parameter for describing this effect. In the preset study, flow visualization and PIV measurement of velocity distributions in a micro channel flow of dilute solution of chain polymers or surfactants have been performed to clarify the relation between drag reduction and characteristic of micro channel flows.
