scholarly journals Fabrication of a 3D Teflon microdevice for energy free homogeneous liquid flow inside a long microchannel and its application to continuous-flow PCR

RSC Advances ◽  
2017 ◽  
Vol 7 (18) ◽  
pp. 10624-10630 ◽  
Author(s):  
Kieu The Loan Trinh ◽  
Wenming Wu ◽  
Nae Yoon Lee
Keyword(s):  
Liquid Flow ◽  
Continuous Flow ◽  
Homogeneous Liquid ◽  
Injection Method ◽  
Sample Injection ◽  
Single Heater

The 3D spiral PTFE microdevice was fabricated for performing continuous-flow PCR using a single heater and via semi-automated sample injection method.

CFD Modelling for Gas-Liquid and Liquid-Liquid Taylor Flows in the Entrance Region of Microchannels

2021 ◽  
Author(s):  
Amin Etminan ◽  
Yuri S. Muzychka ◽  
Kevin Pope
Keyword(s):  
Liquid Flow ◽  
Continuous Flow ◽  
Velocity Ratio ◽  
Time History ◽  
Simulation Method ◽  
Cfd Modelling ◽  
Cross Sectional ◽  
Systematic Analysis ◽  
Gas Liquid Flow ◽  
The Moment

Abstract This paper presents a CFD-based simulation method for air/water and water/dodecane Taylor flows through an axisymmetric microchannel with a circular cross-sectional area. A systematic analysis is conducted by exploring the effects of different superficial velocities and apparent viscosities on the hydrodynamics of a slug flow regime. A concentric junction is employed to make bubbles of air in a continuous flow of water and slugs of water in a continuous flow of dodecane oil. A time-history study is conducted to predict the air-bubble and water-slug evolution processes, in particular at the moment of slug breakup. The results show that the larger apparent viscosity ratio of phases involved in the liquid-liquid flow generates a more stable interface. However, the liquid slug length is less and film thickness is slightly larger in liquid-liquid compared to gas-liquid flow. Furthermore, variations in gas and liquid holdups are correlated by the superficial velocity ratio. The numerical analysis developed in this paper is in good agreement with the correlations and data in the literature.

Flow stabilizer on a syringe tip for hand-powered microfluidic sample injection

Lab on a Chip ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 214-222 ◽  
Author(s):  
Nan Xiang ◽  
Yu Han ◽  
Yuan Jia ◽  
Zhiguo Shi ◽  
Hong Yi ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Sample Injection ◽  
Resource Poor ◽  
Flow Stabilizer

We proposed a novel syringe flow-stabilizer for hand-powered, precise, continuous-flow microfluidic sample injection in resource-poor settings.

Simultaneous separation and sensitive detection of four β2-agonists in biological specimens by CE-UV using a field-enhanced sample injection method

2015 ◽  
Vol 7 (1) ◽  
pp. 175-180 ◽  
Author(s):  
Cheng Chen ◽  
Lingchen Meng ◽  
Meixian Li ◽  
Zhiwei Zhu
Keyword(s):  
Cost Effective ◽  
Sensitive Detection ◽  
Injection Method ◽  
Sample Injection ◽  
Simultaneous Separation ◽  
Sensitive Determination ◽  
Β2 Agonists

A rapid, sensitive and cost-effective CE-UV method has been developed for the simultaneous separation and sensitive determination of four beta2-agonists.

scholarly journals High-performance monoliths in heterogeneous catalysis with single-phase liquid flow

2017 ◽  
Vol 2 (4) ◽  
pp. 498-511 ◽  
Author(s):  
Christian P. Haas ◽  
Tibor Müllner ◽  
Richard Kohns ◽  
Dirk Enke ◽  
Ulrich Tallarek
Keyword(s):  
Heterogeneous Catalysis ◽  
Liquid Flow ◽  
Continuous Flow ◽  
High Performance ◽  
Single Phase ◽  
Rapid Screening ◽  
Flow Mode ◽  
Reaction Parameters ◽  
On Line ◽  
Phase Liquid

On-line control and monitoring in heterogeneous catalysis utilizing high-performance supports allows rapid screening of intrinsic reaction parameters in continuous-flow mode.

Nanoturf Surfaces for Reduction of Liquid Flow Drag in Microchannels

2004 ◽  
Author(s):  
Chang-Hwan Choi ◽  
Joonwon Kim ◽  
Chang-Jin Kim
Keyword(s):  
Drag Reduction ◽  
Liquid Flow ◽  
Continuous Flow ◽  
Good Control ◽  
Black Silicon ◽  
Parallel Plates ◽  
Fluidic Devices ◽  
Engineered Surfaces ◽  
Flow Drag ◽  
Liquid Flows

We report nano-engineered surfaces (NanoTurf), designed to make various micro- and nano-fluidic devices and systems less frictional for liquid flows, and describe microchannels made with such a surface. While our group has reported a dramatic (> 95%) drag reduction of discrete droplets flowing in a space between two parallel-plates covered with “random” nano-posts created by the “black silicon method” [1], this paper describes various nanofabrication techniques, including those capable of “designing” nanostructures with not only a good control of pattern sizes and periods but also practical manufacturability to be embedded in various micro- and nano-fluidic devices and systems. Microchannels are developed using the designed nanostructure surfaces and used for continuous flow tests.

Homogeneous Liquid-Phase Oxidation of Ethylbenzene to Acetophenone in Continuous Flow Mode

ACS Catalysis ◽  
2013 ◽  
Vol 3 (12) ◽  
pp. 2669-2676 ◽  
Author(s):  
Bernhard Gutmann ◽  
Petteri Elsner ◽  
Dominique Roberge ◽  
C. Oliver Kappe
Keyword(s):  
Liquid Phase ◽  
Continuous Flow ◽  
Liquid Phase Oxidation ◽  
Flow Mode ◽  
Homogeneous Liquid ◽  
Phase Oxidation ◽  
Oxidation Of Ethylbenzene
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