Article
Energy & Fuels
Ji-Hyun Oh, Muhammad Tanveer, Kwang-Yong Kim
Summary: A novel double-bridge shape was proposed for a membraneless microfluidic fuel cell, leading to improved electrochemical performance. Parameter studies showed that adjusting different channel parameters could optimize power density and enhance energy conversion efficiency in the fuel cell.
Article
Green & Sustainable Science & Technology
Lanka Tata Rao, Satish Kumar Dubey, Arshad Javed, Sanket Goel
Summary: Laser-induced graphene (LIG) is a three dimensional porous material with excellent properties, and in this study, a low-cost microfluidic fuel cell with LIG electrodes was proposed. By optimizing parameters, the performance of the fuel cell was enhanced.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Review
Energy & Fuels
Muhammad Tanveer, Eun Su Lim, Kwang-Yong Kim
Summary: This review article focuses on the development of membraneless microfluidic fuel cells, highlighting the microchannel geometry and electrode architecture. It discusses the impact of mixing and depletion regions on performance, as well as the enhancement of mass transfer through effective design of channels and electrodes.
Review
Energy & Fuels
Muhammad Tanveer, Kwang-Yong Kim
Summary: Membraneless microfluidic fuel cells (MMFCs) are being extensively studied as an alternative to batteries and conventional membrane fuel cells due to their simple functioning and lower manufacturing cost. This review article summarizes different flow configurations of MMFCs reported between 2002 and 2020, focusing on how they improve power density output by reducing or modifying diffusive mixing and depletion zones. Opportunities for research and challenges in improving MMFC performance are also discussed.
Article
Energy & Fuels
Ji-Hyun Oh, Tien-Dung Vuong, Kwang-Yong Kim
Summary: This work conducted a design optimization study to improve the performance of a membraneless microfluidic fuel cell with a double-bridge cross-section of the flow channel. The governing equations were solved numerically to analyze the electrochemical phenomena and evaluate the performance of the fuel cells. Optimization was performed using a genetic algorithm combined with a surrogate model to maximize the peak power density. The optimal design showed a 57.6% increase in peak power density compared to the reference design.
Article
Chemistry, Physical
Alonso Moreno-Zuria, Abraham Ulises Chavez-Ramirez, Mohamed Mohamedi
Summary: A 3-D model is established to understand the behavior of microfluidic channels, and the results show a good agreement between experiments and simulations. By reducing the gap between the anode and the cathode, the power output and fuel utilization are improved. Additionally, a proof of concept is demonstrated with a stack of three microfluidic channels, showing potential for low power electronic applications.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Peiyao Zhi, Zhi Liu, Kui Jiao, Qing Du
Summary: The research on H-shaped air-breathing dual MFC and their stacks design theory, evaluated their performance through mathematical models, and the results are in good agreement with experimental data. The H-shaped dual cell shows higher output voltage and power density compared to traditional single cell.
ELECTROCHIMICA ACTA
(2021)
Article
Engineering, Manufacturing
Lanka Tata Rao, Satish Kumar Dubey, Arshad Javed, Sanket Goel
Summary: Membraneless Microfluidic Paper Fuel Cells (MMPFCs) have the advantage of eliminating the need for membrane and external pumps, and can provide enhanced energy densities through optimized configurations.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING
(2021)
Article
Green & Sustainable Science & Technology
Li Li, Lei Ling, Yajun Xie, Shuai Shan, Shaoyi Bei, Keqing Zheng, Qiang Xu
Summary: Counter-flow microfluidic fuel cell faces problems of non-uniform reaction rate distribution and poor electrode contribution. This study introduces a novel trapezoidal electrode design to improve its performance. Numerical analyses show that the isosceles trapezoidal electrode performs better than rectangular electrodes even at lower flow rates. The improved performance is attributed to the enlarged active region, reduced ionic resistance, and distinctive fluid distribution. Further optimization studies suggest that the isosceles trapezoidal design is preferred. Overall, the trapezoidal electrode shows promise for counter-flow microfluidic fuel cells and warrants further development.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Engineering, Electrical & Electronic
Mrunali D. Wagh, Subhendu Kumar Sahoo, Sanket Goel
Summary: The research introduces a microfluidic device with integrated microchannel and interdigitated electrodes based on capacitive sensing mechanism manufactured using the laser-induced graphene technique. The device demonstrated linear impedance change for different chemicals in the range of 1-1000 ppm under microfluidic conditions, with a minimum detection limit of 1 ppm. The microfluidic taste sensor has the potential to provide low-cost, simple-to-integrate multi-functional point-of-care sensors for human sensory tastes, clinical, and environmental applications.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Thermodynamics
Ya-lu Fu, Biao Zhang, Xun Zhu, Ding-ding Ye, Pang-Chieh Sui, Ned Djilali, Qiang Liao
Summary: In this study, pore-scale Lattice Boltzmann models were developed to investigate the air-breathing cathode of membraneless microfluidic fuel cells. The results indicated that the microstructure of the gas diffusion layer played a crucial role in oxygen transport and reaction, while the electrolyte flow rate showed minimal impacts.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Mathematics
Syarif Syahrul Syazwan Muzhaimey, Nik Nazri Nik Ghazali, Mohd Zamri Zainon, Irfan Anjum Badruddin, Mohamed Hussien, Sarfaraz Kamangar, N. Ameer Ahammad
Summary: This study focuses on improving the thermal performance of microchannel heat sink (MCHS) using the passive reentrant cavity approach. Numerical simulations were conducted on a single-channel model of MCHS to examine the effects of geometrical parameters on pressure drops and heat transfer under steady-state conditions. The results show that the conical-shaped microchannel heat sink significantly enhances convection heat transfer with minimal pressure loss.
Article
Energy & Fuels
Biswajit Samir De, Joshua Cunningham, Neeraj Khare, Jing-Li Luo, Anastasia Elias, Suddhasatwa Basu
Summary: The study demonstrates the tandem operation of a membraneless, two-phase flow microfluidic electrolysis cell and fuel cell, which is a step towards developing an independent micropower source. By controlling the flow rate of electrolyte, gas product mixing and crossover can be avoided. The tandem operation of mu EC-mu FC in acidic and alkaline electrolytes shows stable and efficient characteristics.
Article
Chemistry, Physical
Dingding Ye, Pengqing Zhang, Jun Li, Xun Zhu, Rong Chen, Qiang Liao
Summary: An innovative in situ approach was proposed to visualize biofilm formation in the microchannel for the microfluidic microbial fuel cell (MMFC) anode, which showed that biofilm formed under moderate flow rate exhibited superior bioelectrochemical performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Mechanics
Anoshanth Jeyasountharan, Gaetano D'Avino, Francesco Del Giudice
Summary: In this study, the effect of confinement ratio on the self-ordering dynamics of particles suspended in a viscoelastic liquid and flowing in a microfluidic channel is investigated through numerical simulations and experiments. The results show that the confinement ratio affects the self-ordering distance and relative particle velocity.
Article
Energy & Fuels
Ji-Hyun Oh, Tien-Dung Vuong, Kwang-Yong Kim
Summary: This work conducted a design optimization study to improve the performance of a membraneless microfluidic fuel cell with a double-bridge cross-section of the flow channel. The governing equations were solved numerically to analyze the electrochemical phenomena and evaluate the performance of the fuel cells. Optimization was performed using a genetic algorithm combined with a surrogate model to maximize the peak power density. The optimal design showed a 57.6% increase in peak power density compared to the reference design.
Article
Energy & Fuels
Tien-Dung Vuong, Kwang-Yong Kim
Summary: This study investigated the effects of a dual-bleeding port recirculation channel on the aerodynamic performance of a single-stage transonic axial compressor and optimized its configuration to enhance operating stability. The addition of the bleeding channel increased its stabilizing effect compared to a single-bleeding channel. Optimization resulted in a 51.36% increase in stall margin with only slight reductions in peak adiabatic efficiency and maximum pressure ratio.
Article
Engineering, Mechanical
Nam-Hun Kim, Kwang-Yong Kim
Summary: This study proposes a novel fluidic oscillator shape with a tapered outlet and numerically evaluates its performance parameters. The results show that the tapered outlet improves the overall performance of the fluidic oscillator without a significant increase in pressure drop.
TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS B
(2022)
Article
Agricultural Engineering
Dang Dinh Nguyen, Thinh Quy Duc Pham, Muhammad Tanveer, Haroon Khan, Ji Won Park, Cheol Woo Park, Gyu Man Kim
Summary: This study introduces a deep learning-based method to optimize the performance of a membraneless microfluidic fuel cell. By combining artificial neural network (ANN) and genetic algorithm (GA), the method achieves a high level of accuracy in determining the optimal inputs for maximum power density.
BIORESOURCE TECHNOLOGY
(2022)
Article
Thermodynamics
Hyeon-Seok Shim, Kwang-Yong Kim
Summary: The study investigates the effects of the number of blades on the impeller-volute interaction and flow instability in a centrifugal pump. Numerical simulations and experimental data are used to analyze the fluctuations in performance parameters and local pressure caused by different blade numbers.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
(2022)
Article
Thermodynamics
Tehmina Ambreen, Arslan Saleem, Muhammad Tanveer, K. Anirudh, S. A. Shehzad, Cheol Woo Park
Summary: This study investigates the entropy generation and hydrothermal characteristics of different pin-fin configurations using water-based MWCNT and MWCNT/GNP nanofluids in a heat sink. Results show that the triangular pin-fin heat sink performs the best, followed by the rhombus and hydrofoil pin-fin heat sinks.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Ji-Hyun Oh, Tien-Dung Vuong, Kwang-Yong Kim
Summary: In this study, design optimization was performed to improve the performance of a membraneless microfluidic fuel cell. The optimal shape demonstrated a peak power density that was 252% higher than that of the reference shape.
TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS B
(2022)
Review
Thermodynamics
Muhammad Tanveer, Tehmina Ambreen, Haroon Khan, Gyu Man Kim, Cheol Woo Park
Summary: Paper-based microfluidic fuel cells (PMFC) have gained significant attention since 2014, being used in various applications such as sensors, wearable devices, and diagnostic testing. PMFCs utilize the characteristics of paper substrate and microfluidics to achieve fuel cell operation without the need for external pumps and membranes. Different fuels have been explored in PMFCs, each with its own advantages and disadvantages. This review article provides a summary of PMFC technology, including its fundamentals, fabrication methods, performance with various fuels, challenges, and future prospects. Recent investigations have shown improved power density and voltage through stacking multiple cells, and enzymatic and microbial PMFCs show potential for wearable devices and lab-on-chip applications.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Analytical
Naas Toufik Tayeb, Shakhawat Hossain, Abid Hossain Khan, Telha Mostefa, Kwang-Yong Kim
Summary: This study conducted three-dimensional numerical investigations of a novel passive micromixer to analyze the hydrodynamic and thermal behaviors of Nano-Non-Newtonian fluids. The research found that for high nanofluid concentrations, a strong chaotic flow significantly enhances the hydrodynamic and thermal performances at all Reynolds numbers. The proposed micromixer showed comparable mixing energy cost to a recent micromixer in terms of fluid homogenization.
Article
Thermodynamics
Haroon Khan, Muhammad Tanveer, Dang Dinh Nguyen, Asad Ullah, Min Chul Shin, Moon Kyu Kwak, Cheol Woo Park, Gyu Man Kim
Summary: This article presents a two-dimensional stacking of microfluidic enzymatic biofuel cells (EBFCs) using a cascade-style serpentine-shaped microfluidic channel. The use of a mixed single electrolyte stream results in stable connection efficiencies, and a novel composite material is used as an air-breathing biocathode. The experimental results show that enzyme immobilisation increases with the number of layers, and the connection efficiencies for various configurations are stable, demonstrating the potential of stacking single-stream microfluidic EBFCs to meet the power requirements of small-scale electronic devices.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Khanh-Duy Cong Do, Duy-Hung Chung, Dang-Quoc Tran, Cong-Truong Dinh, Quang-Hai Nguyen, Kwang-Yong Kim
Summary: Effective cooling structure design is crucial in modern jet engines for improving turbine efficiency and maintaining structural integrity. This study investigates the flow-field and heat transfer characteristics of pin-fin arrays with roughed endwalls, and proposes optimized endwall configurations to enhance heat transfer capacity.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Analytical
Telha Mostefa, Aissaoui Djamel Eddine, Naas Toufik Tayeb, Shakhawat Hossain, Arifur Rahman, Bachiri Mohamed, Kwang-Yong Kim
Summary: In this study, a numerical investigation is conducted to study the unsteady laminar flow of high viscosity fluid in a twisted double planetary mixer. The results show that through the modulation of rotational velocities, chaotic advection can be achieved, enhancing fluid mixing efficiency under low Reynolds and high Peclet numbers.
Article
Engineering, Mechanical
Mariyam Sattar, Meshal Alzaid, Naveed Ur Rehman Junejo, Rizwan Ahmed Malik, Muhammad Tanveer, Muhammad Latif
Summary: This study provides an analytical modeling and analysis method to simulate the behavior of solar panels and calculate the disruption response of SADA rotating flexible loading. The results show that increasing the number of rotor teeth increases the vibration frequency and decreases the vibration amplitude.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2023)
Editorial Material
Chemistry, Analytical
Kwang-Yong Kim
Review
Green & Sustainable Science & Technology
Haroon Khan, Muhammad Tanveer, Cheol Woo Park, Gyu Man Kim
Summary: Enzymatic biofuel cells (EBFCs) are a promising technology that utilizes enzymes as biocatalysts for clean energy production. Integrating EBFCs into microfluidic architecture allows for their application in portable, implantable, and wearable microelectronics. However, challenges such as inefficient fuel oxidation, short lifetimes, and limited power density hinder their development. This review comprehensively discusses the attributes, microfabrication techniques, potential applications, and challenges of microfluidic EBFCs, providing insights into the past, present, and future of this emerging green technology.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)