2009
DOI: 10.1016/j.mechrescom.2008.08.009
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Microfluidic rheometry

Abstract: The development and growth of microfluidics has stimulated interest in the behaviour of complex liquids in microscale geometries and provided a rich platform for rheometric investigations of non-Newtonian phenomena at small scales. Microfluidic techniques present the rheologist with new opportunities for material property measurement and this review discusses the use of microfluidic devices to measure bulk rheology in both shear and extensional flows. Capillary, stagnation and contraction flows are presented i… Show more

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Cited by 230 publications
(170 citation statements)
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“…Superhydrophobic surfaces created by elastic instability can contribute to the recent advances in microfluidics which allowed the development of rheometers on a chip [15][16][17], where microfluidics is a competitive platform for performing rheometry. Therefore, the control of wall adherence and degree of slipping become central topics for this sort of applications application of microfluidics [18][19][20].…”
Section: Introductionmentioning
confidence: 99%
“…Superhydrophobic surfaces created by elastic instability can contribute to the recent advances in microfluidics which allowed the development of rheometers on a chip [15][16][17], where microfluidics is a competitive platform for performing rheometry. Therefore, the control of wall adherence and degree of slipping become central topics for this sort of applications application of microfluidics [18][19][20].…”
Section: Introductionmentioning
confidence: 99%
“…An overview of several canonical flow types and the challenges associated with quantitative microfluidic rheometry can be found in [8]. In the present work, we focus on two different T-shaped microchannels that are specially constructed to enable an investigation of viscoelastic effects on the stability of planar elongation flows.…”
Section: Introductionmentioning
confidence: 99%
“…7 A different class of instruments for probing elongational properties of dilute solutions is based on steady flow of viscoelastic fluids through a contraction or a contraction/expansion. 18,30,44 Imposing a sudden contraction on a fully developed channel flow induces streamwise extensional kinematics that can cause significant stretching in the microstructure of the fluid, which then results in an extra pressure drop across the contraction/expansion. Essentially, this is the microfluidic analog of the "orifice plate" widely used for inline measurement of the flow rate of the Newtonian fluids (with constant rheology).…”
Section: Introductionmentioning
confidence: 99%
“…Considering the recent developments in microfluidic devices/flows for biological applications and the fact that many of the relevant liquids are of a weakly viscoelastic nature 30,44,[58][59][60][61][62] it is important for the rheologist to develop a comprehensive understanding of the relative merits of different devices available for measuring the elongational rheology of dilute solutions. This situation is complicated by the knowledge that the extensional viscosity of a microstructured material is typically a time-varying function of both the strain rate _ ðtÞ and the total strain ¼ Ð t 0 _ ðt 0 Þdt 0 imposed on a material element.…”
Section: Introductionmentioning
confidence: 99%