Journal
MICROFLUIDICS AND NANOFLUIDICS
Volume 17, Issue 3, Pages 605-611Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10404-013-1329-z
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Funding
- Aquitaine Region
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In this work, we present a way to make rheological measurements on a microfluidic chip. The originality of our approach relies on the determination of the flow curve of a fluid using the Rabinowitsch-Mooney equation. For this purpose, we use a parallel flow between a reference fluid and a studied fluid to measure the pressure drop inside the channel. Using a Newtonian fluid of known viscosity, knowing the flow rates of the two liquids and measuring the geometrical features of the two-phase flow allows determining the pressure drop in the channel. The Rabinowitsch-Mooney equation is used to calculate the local shear rate and shear stress at the wall for the studied sample. We validate our method for several complex fluids.
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