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Viscosity measurement using hydrodynamic divergencing chamber and digital counting in microfluidic channels

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3 Author(s)
Yang Jun Kang ; Sch. of Inf. & Mech., GIST, Gwangju, South Korea ; Sang Youl Yoon ; Sung Yang

This paper reports an efficient method to measure fluid viscosity in microchannels using hydrodynamic diverging chamber and digital counting. A proposed microfluidic viscometer is designed to have two inlets for sample as well as reference fluids, and a divergencing channel with 89 channels for digital counting. DI water and SDS solutions are used as a reference fluid and a sample fluid, respectively. The viscosities measured by the proposed microfluidic viscometer are compared with the ones measured by a commercially available viscometer (HAAKE MARS). The averaged deviation for four different viscosities measured by both viscometers is only about 2.5 %. Additionally, the microfluidic viscometer gives more consistent value, especially in low shear rate regime.

Published in:

Micro Electro Mechanical Systems (MEMS), 2010 IEEE 23rd International Conference on

Date of Conference:

24-28 Jan. 2010