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Pressure drop and velocity profile for a micro tube were investigated on laminar flow of distilled water and dilute polymer solutions. It is the range of 50.2-251.8μmin diameter, and the value of l/d is about 340. By a pressure drop measurement it is shown that the experimental data agree with Hagen-Poiseuille equation in the case of Newtonian fluids. And the flow rate of the dilute polymer solutions increased comparing with that of distilled water at the low Reynolds number range. The increase ratio of the flow rate is about 15% in maximum in the case of d=251.8μm. For the result of micro PIV measurement, there are few differences between the velocity profile of distilled water and Peo 5 ppm solution.

Flow Characteristics of Dilute Polymer Solutions in a Micro Tube