Article
Mechanics
M. Majhi, A. K. Nayak, Subhajyoti Sahoo
Summary: This study investigates the mixing efficiency and the enhancement of electro-osmotic flow over a hydrophobic structured microchannel with a nozzle-diffuser under an external electric field. By varying the interfacial surface zeta potential, a strong convection effect is induced between two injecting fluids for different Reynolds numbers. The numerical simulation incorporates the Poisson-Nernst-Plank model to handle the thick and thin diffuse layers formed by a non-Newtonian electrolyte solution. The results showed that hydrodynamic slip increased flow velocity, while heterogeneous zeta potential generated a backflow that improved mixing efficiency. Moreover, the study discussed the mixing performance of different types of fluids and explored the effect of various physio-chemical parameters on mixing efficiency.
Review
Biochemical Research Methods
Tannaz Tavari, Mohsen Nazari, Saber Meamardoost, Ali Tamayol, Mohamadmahdi Samandari
Summary: This review provides a comprehensive understanding of electric-driven fluid manipulation in microchannels and their use as micropumps in microfluidic devices. Different electrokinetic mechanisms and electrode configurations are discussed, offering conclusive information for the selection of efficient and affordable fluid transport strategies. Recent theoretical, numerical, and experimental investigations are covered to provide insights for lab-on-chip applications.
Article
Thermodynamics
Thota Siva, Srinivas Jangili, Bidyasagar Kumbhakar
Summary: This study theoretically investigates the electroosmotic and electromagnetohydrodynamic (EMHD) transport of couple stress fluid in a microchannel under simultaneous magnetic and electric field. The flow dynamics, thermal transport, and entropy generation in a thermofluidic system with slip-dependent (SD) zeta potential are predicted. Key parameters such as couple stress, slip length, Hartmann number, pressure gradient, and transverse electric field are considered, and their effects are shown graphically. The results highlight the significant influence of flow velocity and thermal energy distribution on entropy generated in the channel under SD zeta potential.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Morteza Dallakenejad, Seyyed Mostafa Seyyedi, Hamid Hassanzadeh Afrouzi, Fatemeh Salehi, Abbasali Abouei Mehrizi
Summary: This paper numerically simulates the electroosmotic flow inside a microchannel with non-uniform Zeta potential (ZP), showing that the flow rate can be controlled by modifying the distribution of surface charge. Results demonstrate that the flow rate changes through ascending, descending, and parabolic modifications of the wall Zeta potential at the midlength of the microchannel.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Mechanics
C. Sasmal
Summary: In a microfluidic device with two fluids of different electrical conductivities transported side by side under the influence of an electric field, an electrokinetic instability (EKI) can be generated, leading to chaotic flow fields and enhancing mixing if the fluids are Newtonian. However, this chaotic convection can be suppressed in viscoelastic fluids due to the formation of high elastic stress chains at the fluid interface. This suppression inhibits mixing of the viscoelastic fluids, cautioning against the use of EKI for such fluids.
Article
Mathematics, Applied
Zhaodong Ding, Kai Tian, Yongjun Jian
Summary: In this study, the pressure-driven electrokinetic flow and energy conversion in a curved microtube in a microfluidic system were investigated. The results showed that the curvature of the microtube led to a skewed distribution of the electrical double layer potential. The curvature also had an inhibitory effect on the magnitude of the streaming potential field induced by the pressure-driven flow. Furthermore, it was found that the flow rate in a curved microtube could be larger than that in a straight one with the same pressure gradient and shape of cross section. The study also suggested that the curved geometry could be beneficial to improving the electrokinetic energy conversion efficiency.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2022)
Article
Mathematics, Applied
Sameh A. Hussein, Sameh E. Ahmed, Anas A. M. Arafa
Summary: This paper presents a comprehensive study on the non-linear peristaltic transport in a vertical uniform/non-uniform channel filled with a Jeffery non-Newtonian nanofluid in the presence of oxytactic microorganisms. The effects of electrical and magnetic fields, linear radiation, and viscous dissipation on flow and heat transfer are analyzed. Numerical solutions for the governing system are introduced and the variations of parameters are discussed. The results show that maximizing the Brinkman number leads to higher features of the extra stress tensor. The velocity, microorganism density, and NP distributions are affected by me${m_e}$, while the temperature distributions are maximized as me${m_e}$ increases.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Mechanics
F. Hamid, C. Sasmal
Summary: When two fluids of different electrical conductivities are transported under the influence of an electric field, the electrokinetic instability (EKI) phenomenon often triggers in a microfluidic device once the electric field strength and conductivity gradient exceed some critical values. This study presents a detailed numerical investigation of how the rheological behavior of a fluid obeyed by the non-Newtonian power-law constitutive relation could influence this EKI phenomenon in a microfluidic T-junction. The analysis shows that the EKI phenomenon is significantly influenced by the fluid rheological behavior, with shear-thinning fluids exhibiting higher intensity and mixing compared to Newtonian and shear-thickening fluids.
Article
Mechanics
P. Kaushik, Sudip Shyam, Pranab Kumar Mondal
Summary: This paper discusses the enhancement strategy of important fluidic functionality, mixing, in an on-chip device embedded in a rotating disk. The analysis considers the effect of rotation and uses classical fluid dynamic equations to comprehensively describe the mixing process. Experiments performed in the case of pure diffusion verify the numerical results effectively. The results show that molecular diffusion and rotation-induced forcing modulate the mixing process in the portable fluidic device, and strong advective transport of species resulting from higher rotational effect can enhance mixing even at short distances.
Article
Thermodynamics
R. Deepak Selvakumar, Daeyoung Kong, Hyeon Kyun Lee, Chirag R. Kharangate, Jaiyoung Ryu, Hyoungsoon Lee
Summary: A three-dimensional numerical analysis was performed to investigate the flow and conjugate heat transfer in a microchannel with the electric-field-induced Onsager-Wien effect. A novel design was proposed to enhance the heat transfer by inducing a pseudo-roughness effect in the microchannel. The results showed that the pseudo-roughness produced by the Onsager-Wien effect significantly improved the heat transfer in the microchannel with a trivial amount of additional power consumption.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Rafael Granda, Jevon Plog, Gen Li, Vitaliy Yurkiv, Farzad Mashayek, Alexander L. Yarin
Summary: The theory developed describes the evolution and steady-state shape of two-dimensional ionic-conductor drops under the action of surface tension and a subcritical electric field on the substrate. Experimental data confirms the theory's accuracy in describing drop shapes on non-wettable substrates.
Article
Nanoscience & Nanotechnology
Qinjian Zhan, Shuyan Deng
Summary: This study investigates the hydrodynamic behaviors and thermal characteristics of pressure-driven electrokinetic slip flow through a microannulus. The slip phenomenon at walls is incorporated for a more reliable prediction. The coupling effect of slip hydrodynamics, annular geometry, viscous dissipation, and Joule heating on thermal behaviors is explored.
Article
Biochemical Research Methods
Tingting Chen, Licong Cui, Wang He, Renxing Liu, Chengqiang Feng, Lei Wu, Yang Wang, Huiyun Liu, Linmao Qian, Bingjun Yu
Summary: As important components in microfluidic chip analysis systems, micromixers have shown wide applications. However, due to fabrication limitations, it is still challenging to achieve high-quality micromixers with both well-designed structures and efficient mixing. This study proposes a method based on the theory of chaotic mixing to design and fabricate sinusoidal structures with variable phases. The results demonstrate that the scratched traces with phase differences can resist etching, leading to the generation of misaligned sine channels with alternating 3D shapes. Further analysis shows that reducing the line spacing in scratching can result in a thicker a-Si layer. With the proposed method, a misaligned sine micromixer with higher mixing efficiency is achieved. The study also investigates the duplicating process for high-precision production of micromixers. Overall, this research provides strategies for miniaturizing high-performance microfluidic chips.
Article
Physics, Applied
Jacob L. Binsley, Stefano Pagliara, Feodor Y. Ogrin
Summary: Integrating miniature pumps within microfluidic devices is crucial for advancing point-of-care diagnostics. This study simulates and evaluates the performance of an elastic-magnetic integrated microfluidic pump, revealing the correlation between the emergence of flow behavior and variables such as frequency and proximity, and providing important insights for the design and optimization of the pump.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Chemical
Haozhe Yi, Taotao Fu, Chunying Zhu, Youguang Ma
Summary: The study investigates the effects of hydrodynamics on droplet adsorption at the parallel flow interface in a microchannel. A stable moving liquid-liquid interface is generated to easily form uniform droplets in each phase of parallel flow. The Laplace pressure on the parallel flow interface leads to different droplet volume distribution when droplets adsorb from different phases. The shape of droplets at the interface deviates from the theoretical Neumann triangle and becomes asymmetric under shear force. Increasing interfacial velocity enhances lubrication force and prevents film rupture, but changes the distribution of lubrication force and tends to cause film rupture downstream. This paper provides a reference for studying droplet adsorption on the parallel flow interface.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Biochemical Research Methods
Cheng Cheng, Jayne Wu, Jiangang Chen
Article
Engineering, Electrical & Electronic
Chunyang Wei, Chengzhuang Yu, Jie Jayne Wu, Junwei Li, Shanshan Li, Shijie Dai, Tiejun Li
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2019)
Article
Engineering, Electrical & Electronic
Shanshan Li, Yu Jiang, Shigetoshi Eda, Jie Jayne Wu
IEEE SENSORS JOURNAL
(2019)
Review
Biochemical Research Methods
Yu Jiang, Jayne Wu
Article
Biochemical Research Methods
Haochen Qi, Meiqi Zhao, Huaguo Liang, Jayne Wu, Zhengfeng Huang, Anming Hu, Jian Wang, Yingchun Lu, Jian Zhang
Article
Environmental Sciences
Jie Wu, Songbai Xue, Denzel Bridges, Yongchao Yu, Linyue Zhang, Joshi Pooran, Curtis Hill, Jayne Wu, Anming Hu
Article
Biophysics
Jian Zhang, Xiaobo Fang, Jayne Wu, Zhiwen Hu, Yu Jiang, Haochen Qi, Lei Zheng, Xiaofeng Xuan
BIOSENSORS & BIOELECTRONICS
(2020)
Article
Chemistry, Analytical
Quan Yuan, Hadi Mirzajani, Barbara Evans, Elias Greenbaum, Jayne Wu
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Biophysics
Jian Zhang, Yu Jiang, Xin Xia, Jayne Wu, Raul Almeida, Shigetoshi Eda, Haochen Qi
BIOSENSORS & BIOELECTRONICS
(2020)
Article
Chemistry, Analytical
Jiamei Huang, Jayne Wu
Article
Engineering, Electrical & Electronic
Haochen Qi, Bo Wang, Huaguo Liang, Jie Jayne Wu, Tianming Ni, Zhengfeng Huang, Yingchun Lu, Jian Zhang
Summary: A sensor for ultra-trace nano CP detection in cleaning fluids has been developed using a gold interdigitated electrode, with a detection limit of 10(2) particles/mL and a response time of 30 s. The sensor can detect CPs of different material and size in solutions with different conductivity, and is portable and cost-effective for industrial-scale on-line application.
IEEE SENSORS JOURNAL
(2021)
Article
Electrochemistry
Jiyu Meng, Jiamei Huang, Rania Oueslati, Yu Jiang, Jiangang Chen, Shanshan Li, Shijie Dai, Qiang He, Jayne Wu
Summary: This study presents a label-free DNAzyme sensor for rapid, highly sensitive, and specific detection of Pb2+ in water samples. The sensor utilizes gold-plated interdigitated electrodes and an optimized AC signal to achieve rapid quantification of Pb2+ levels with a detection limit of 1.26 fM. The sensor demonstrates high promise for on-site detection of Pb2+ in practical samples.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Rania Oueslati, Yu Jiang, Jiangang Chen, Jayne Wu
Summary: The development of an AC electrokinetics-based capacitive (ABC) biosensor for detecting genomic DNA of MRSA shows rapid, sensitive, and specific detection potential, making it suitable for point-of-care diagnosis and adaption for the detection of other infectious agents.
Proceedings Paper
Engineering, Biomedical
Jia Liang, Fanqi Wang, Xiaogang Lin, Hairong Qi, Jayne Wu
2019 41ST ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY (EMBC)
(2019)
Review
Chemistry, Multidisciplinary
Jian Zhang, Xuan Sun, Jayne Wu
APPLIED SCIENCES-BASEL
(2019)
