A micropillar-based microfluidic viscometer for Newtonian and non-Newtonian fluids

Mustafa, Adil; Eser, Aysenur; Aksu, Ali Cenk; Kiraz, Alper; Tanyeri, Melikhan; Erten, Ahmet; Yalçın, Özlem

doi:10.1016/j.aca.2020.07.039

Cited by 30 publications

(23 citation statements)

References 40 publications

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“…By using a numerical model developed by the authors, they linked the post deflection to the fluid viscosity, demonstrating good agreement with conventional bulk techniques for sucrose and Karo solutions. A similar device was also reported by Mustafa et al [26], who made the pillars fully flexible and tracked their deflection during the flow inside the microchannel and linked the deflection to the viscosity of the flowing liquid. They applied their device to the viscosity measurement of decanol, aqueous glycerol solutions and whole blood.…”

Section: Micro-electro-mechanical Systems (Mems)mentioning

confidence: 68%

A Review of Microfluidic Devices for Rheological Characterisation

Giudice

2022

Micromachines

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The rheological characterisation of liquids finds application in several fields ranging from industrial production to the medical practice. Conventional rheometers are the gold standard for the rheological characterisation; however, they are affected by several limitations, including high costs, large volumes required and difficult integration to other systems. By contrast, microfluidic devices emerged as inexpensive platforms, requiring a little sample to operate and fashioning a very easy integration into other systems. Such advantages have prompted the development of microfluidic devices to measure rheological properties such as viscosity and longest relaxation time, using a finger-prick of volumes. This review highlights some of the microfluidic platforms introduced so far, describing their advantages and limitations, while also offering some prospective for future works.

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Section: Micro-electro-mechanical Systems (Mems)mentioning

confidence: 68%

A Review of Microfluidic Devices for Rheological Characterisation

Giudice

2022

Micromachines

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“…Rotational viscometers based on measuring the torque required to rotate a spindle in the sample fluids can respond to a wide range of viscosities, but suffer from the drawbacks of being bulky, being expensive, and requiring large volumes of fluid. Various advanced approaches, such as droplet-based microfluidic approaches with microchannels [6][7][8][9] , suspended microchannel resonators [10][11][12] , vibrating cantilevers, and piezoelectric resonators [13][14][15][16] , have been proposed to boost the sensitivity to fluid viscosity at specific viscosity ranges. Therefore, the development of miniature, low-cost viscometers capable of wide-range, real-time measurement has remained challenging.…”

Section: Dear Editormentioning

confidence: 99%

Miniature viscometer incorporating GaN optical devices with an ultrawide measurement range

Luo¹,

Lu²,

Wang³

et al. 2023

gxjzz

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“…The R 2 values over different concentrations and temperatures are 0.99701 and 0.99914, respectively, 47 and the average normalized difference is less than 5%, which shows that the new Stokes viscometer achieves good accuracy. 48,49 Therefore, the liquid viscosity can be obtained by measuring the fluctuation of EWCWs over a wide range of viscosities. The experimental results are comparable with the actual values, and the measurement accuracy is guaranteed over a range of temperatures.…”

Section: ■ Experimental Setupmentioning

confidence: 99%

Effects of Liquid Viscosity on the Formation and Attenuation of Capillary Waves Induced by AC Electrowetting-on-Dielectric

et al. 2022

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The capillary waves induced by electrowetting-ondielectric have great potential in terms of capillary propulsion and other applications. At present, these applications are limited by a lack of research on the effects of liquid viscosity, which is an important parameter in controlling this phenomenon. This paper examines the formation, propagation, and attenuation of electrowetting-on-dielectric-induced capillary waves (EWCWs) on a liquid-free surface with different levels of liquid viscosity. The formation and propagation of the capillary waves are visualized using a high-speed camera and a free-surface synthetic Schlieren method. A theoretical model is established to describe the wave amplitude and wave propagation of EWCWs. The results show that the liquid viscosity, as well as the surface tension, significantly affects the formation and propagation of EWCWs. Using the results presented in this paper, a new type of Stokes viscometer based on EWCWs is proposed, enabling accurate measurements of liquid viscosity over a wide range of viscosity and temperature conditions.

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A micropillar-based microfluidic viscometer for Newtonian and non-Newtonian fluids

Cited by 30 publications

References 40 publications

A Review of Microfluidic Devices for Rheological Characterisation

A Review of Microfluidic Devices for Rheological Characterisation

Miniature viscometer incorporating GaN optical devices with an ultrawide measurement range

Effects of Liquid Viscosity on the Formation and Attenuation of Capillary Waves Induced by AC Electrowetting-on-Dielectric

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