scholarly journals Tunable Particle Focusing in a Straight Channel with Symmetric Semicircle Obstacle Arrays Using Electrophoresis-Modified Inertial Effects

Micromachines ◽  
2016 ◽  
Vol 7 (11) ◽  
pp. 195 ◽  
Author(s):  
Dan Yuan ◽  
Chao Pan ◽  
Jun Zhang ◽  
Sheng Yan ◽  
Qianbin Zhao ◽  
...  
Keyword(s):  
Inertial Effects ◽  
Straight Channel ◽  
Particle Focusing

Inertial focusing and zeta potential measurements of single-nanoparticles using octet-nanochannels

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Shohei Kishimoto ◽  
Makusu Tsutsui ◽  
Kazumichi Yokota ◽  
Masateru Taniguchi
Keyword(s):  
Zeta Potential ◽  
Inertial Effects ◽  
Inertial Focusing ◽  
Particle Focusing ◽  
Single Nanoparticle

Electrokinetics in octet nanochannels was demonstrated to enable particle focusing via inertial effects to accurate single-nanoparticle zeta-potential measurements.

scholarly journals Sheathless Dean-flow-coupled elasto-inertial particle focusing and separation in viscoelastic fluid

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3461-3469 ◽  
Author(s):  
Dan Yuan ◽  
Say Hwa Tan ◽  
Qianbin Zhao ◽  
Sheng Yan ◽  
Ronald Sluyter ◽  
...  
Keyword(s):  
Viscoelastic Fluid ◽  
Straight Channel ◽  
Inertial Particle ◽  
Channel Section ◽  
Dean Flow ◽  
Particle Focusing

Sheathless particle focusing and separation in viscoelastic fluid is demonstrated using an integrated ECCA (straight channel section with asymmetrical expansion–contraction cavity arrays) straight channel.

Continuous plasma extraction under viscoelastic fluid in a straight channel with asymmetrical expansion–contraction cavity arrays

Lab on a Chip ◽  
2016 ◽  
Vol 16 (20) ◽  
pp. 3919-3928 ◽  
Author(s):  
Dan Yuan ◽  
Jun Zhang ◽  
Ronald Sluyter ◽  
Qianbin Zhao ◽  
Sheng Yan ◽  
...  
Keyword(s):  
Viscoelastic Fluid ◽  
High Purity ◽  
Inertial Effects ◽  
Straight Channel ◽  
Dean Flow ◽  
Plasma Extraction

By exploiting the Dean-flow-coupled elasto-inertial effects, continuous, sheathless, and high purity plasma extraction under viscoelastic fluid in a straight channel with asymmetrical expansion–contraction cavity arrays (ECCA channel) is demonstrated.

High-throughput particle focusing and separation in split-recombination channel

2022 ◽  
Vol 32 (2) ◽  
pp. 025007
Author(s):  
Shuang Chen ◽  
Zongqian Shi ◽  
Jiajia Sun ◽  
Shenli Jia ◽  
Mingjie Zhong ◽  
...  
Keyword(s):  
High Throughput ◽  
Lift Force ◽  
Curvature Radius ◽  
Straight Channel ◽  
Geometrical Structures ◽  
Inertial Focusing ◽  
Particle Focusing ◽  
Drag Forces ◽  
Recombination Channel ◽  
Flow Drag

Abstract Inertial microfluidic has been widely applied to manipulate particles or bio-sample based on the inertial lift force and Dean Vortices. This technology provides significant advantages over conventional technologies, including simple structure, high throughput and freedom from an external field. Among many inertial microfluidic systems, the straight microchannel is commonly used to produce inertial focusing, which is a phenomenon that particles or cells are aligned and separated based on their size under the influence of inertial lift force. Besides the inertial lift force, flow drag forces induced by the geometrical structures of microchannel can also affect particle focusing. Herein, a split-recombination microchannel, consisting of curved and straight channels, is proposed to focus and separate particles at high flow rate. As compared with the straight channel, the particle focusing in the split-recombination channel is greatly improved, which results from the combined effects of the inertial lift force, the curvature-induced Dean drag force and the structure of split and recombination. Moreover, the distribution of different-sized particles in designed microchannel is investigated. The results indicate that the proposed microchannel not only enhances the particle focusing but also enables the separation of different-sized particles with high throughput. Finally, it is discovered that the larger length of straight channel and curvature radius of curved channel can result in a more efficient particle separation. Another important feature of designed split-recombination microchannel is that it can be arranged in parallel to handle large-volume samples, holding great potential in lab-on-a-chip applications.

scholarly journals Dynamics of particle migration in channel flow of viscoelastic fluids

2015 ◽  
Vol 785 ◽  
pp. 486-505 ◽  
Author(s):  
Gaojin Li ◽  
Gareth H. McKinley ◽  
Arezoo M. Ardekani
Keyword(s):  
Channel Flow ◽  
Fluid Transport ◽  
Shear Thinning ◽  
Secondary Flows ◽  
Particle Migration ◽  
Scaling Analysis ◽  
Inertial Effects ◽  
Particle Focusing ◽  
Start Up ◽  
Wide Range

The migration of a sphere in the pressure-driven channel flow of a viscoelastic fluid is studied numerically. The effects of inertia, elasticity, shear-thinning viscosity, secondary flows and the blockage ratio are considered by conducting fully resolved direct numerical simulations over a wide range of parameters. In a Newtonian fluid in the presence of inertial effects, the particle moves away from the channel centreline. The elastic effects, however, drive the particle towards the channel centreline. The equilibrium position depends on the interplay between the elastic and inertial effects. Particle focusing at the centreline occurs in flows with strong elasticity and weak inertia. Both shear-thinning effects and secondary flows tend to move the particle away from the channel centreline. The effect is more pronounced as inertia and elasticity effects increase. A scaling analysis is used to explain these different effects. Besides the particle migration, particle-induced fluid transport and particle migration during flow start-up are also considered. Inertial effects, shear-thinning behaviour, and secondary flows are all found to enhance the effective fluid transport normal to the flow direction. Due to the oscillation in fluid velocity and strong normal stress differences that develop during flow start-up, the particle has a larger transient migration velocity, which may be potentially used to accelerate the particle focusing.

Approximate Calculation of Pressure Drop in Laminar Flow of Generalized Newtonian Liquid Through Channel of Noncircular Cross Section

1994 ◽  
Vol 59 (3) ◽  
pp. 603-615 ◽  
Author(s):  
Václav Dolejš ◽  
Ivan Machač ◽  
Petr Doleček
Keyword(s):  
Pressure Drop ◽  
Laminar Flow ◽  
Numerical Solution ◽  
Cross Section ◽  
Approximate Calculation ◽  
Newtonian Liquid ◽  
Straight Channel ◽  
Suggested Procedure ◽  
Noncircular Cross Section ◽  
Calculation Results

The paper presents a modification of the equations of Rabinowitsch-Mooney type for an approximate calculation of pressure drop in laminar flow of generalized Newtonian liquid through a straight channel whose cross section forms a simple continuous area. The suitability of the suggested procedure of calculation of pressure drop is demonstrated by the comparison of calculation results with both the published and original results of numerical solution and experiments.

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