Creeping flow analysis of an integrated microfluidic device for rheometry

Bandalusena, H C Hemaka; Zimmerman, William B.; Rees, Julia M.

doi:10.1016/j.jnnfm.2010.06.013

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…They found that for these fluids the dominant contribution to the Bagley correction came from the flow in contraction and expansion regions upstream and downstream of the channel, rather than from the development region in the straight channel itself. Experiments with xanthan gum flowing in a T-channel have also been studied by Bandalusena et al (2009) and corresponding computational studies have been preformed by Bandalusena et al (2010). Microfluidic analogues of the four-roll mill have been studied for imposing mixed extensional and shear flows (Hudson et al (2004); Lee et al (2007)).…”

Section: Introductionmentioning

confidence: 99%

Microfluidic extensional rheometry using a hyperbolic contraction geometry

et al. 2013

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Microfluidic devices are ideally suited for the study of complex fluids undergoing large deformation rates in the absence of inertial complications. In particular, a microfluidic contraction geometry can be utilized to characterize the material response of complex fluids in an extensionally-dominated flow, but the mixed nature of the flow kinematics makes quantitative measurements of material functions such as the true extensional viscosity challenging. In this paper, we introduce the 'extensional viscometer-rheometer-on-a-chip' (EVROC), which is a hyperbolically-shaped contractionexpansion geometry fabricated using microfluidic technology for characterizing the importance of viscoelastic effects in an extensionally-dominated flow at large extension rates (λε a 1, where λ is the characteristic relaxation time, or for many industrial processesε a 1 s −1 ). We combine measurements of the flow kinematics, the mechanical pressure drop across the contraction and spatially-resolved flow-induced birefringence, to study a number of model rheological fluids as well as several representative liquid consumer products in

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Section: Introductionmentioning

confidence: 99%

Microfluidic extensional rheometry using a hyperbolic contraction geometry

et al. 2013

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“…However, it was not until 2007 that the basic terms for paper-based microfluidics were coined by proposing a paper-based protein-glucose assay patterned using lithography ( Martinez et al., 2007 ). Since then, paper-based microfluidics have attracted much interest for the many advantages paper offers compared to traditional microfluidic tests such as creeping flow ( Bandalusena et al., 2010 ), inertial microfluidics ( Di Carlo, 2009 ), and droplet microfluidics ( Sohrabi et al., 2020 ). The advantageous unique properties of paper emerge from its porous and fibrous structure, allowing capillary action that enables sample flow without the need for any external pumping force ( Noh and Phillips, 2010 ; Yetisen et al., 2013 ; Lu et al., 2010 ).…”

Section: Methodsmentioning

confidence: 99%

Disposable paper-based microfluidics for fertility testing

et al. 2022

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“…An overview of development in microfluidic rheometry up to 2009 was given by Pipe and McKinley (2009). More recent work in this field was done, for example, by Zimmerman and co-workers: Bandalusena et al (2010) and Craven et al (2010).…”

Section: Introductionmentioning

confidence: 99%

Hele-Shaw rheometry

Drost¹,

Westerweel²

2013

Journal of Rheology

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SynopsisIn this paper, we describe a novel approach to determine the flow behavior index of a power-law fluid by means of a microfluidic device. The concept of this method is based on a mathematical analysis by Aronsson and Janfalk [Eur. J. Appl. Math. 3, 343-366 (1992)] of Hele-Shaw flow of power-law liquids. We implement this approach by driving a non-Newtonian fluid through a glass microfluidic chip with a 100:1 contraction. The flow in this chip satisfies the Hele-Shaw flow conditions in most of the device. Two conjugate p-Laplace equations describe the pressure and stream function in such flows. These equations depend on the flow behavior index, n. Therefore, by fitting the p-Laplace equation to the velocity field obtained from a micro particle image velocimetry measurement of the flow, the flow behavior index of the fluid in the chip can be determined. Because in practice, fluids rarely show perfectly inelastic power-law behavior, conditions under which the assumption of inelastic flow is valid were derived by analyzing Hele-Shaw flow of an Oldroyd-B fluid. The concept was tested using three different classes of model fluids, a Newtonian fluid, an inelastic power-law fluid, and a Boger fluid. In all three cases, satisfactory results were obtained, with values of n deviating at most 4% from values measured using conventional rheometry. The method presented here is expected to be potentially useful in online quality control in, for example, polymer or food processing. V C 2013 The Society of Rheology. [http://dx

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Creeping flow analysis of an integrated microfluidic device for rheometry

Cited by 7 publications

References 17 publications

Microfluidic extensional rheometry using a hyperbolic contraction geometry

Microfluidic extensional rheometry using a hyperbolic contraction geometry

Disposable paper-based microfluidics for fertility testing

Hele-Shaw rheometry

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