Article
Multidisciplinary Sciences
Arafat Hussain, Jun Wang, Yasir Akbar, Riaz Shah
Summary: In this study, the thermal and flow properties of modified hybrid nanofluids (MNFs) were investigated under the effects of electroosmosis and homogeneous-heterogeneous chemical reactions. The results showed that an increase in the heterogeneous reaction parameter helps enhance the concentration profile, while an increase in the volume fraction of nanoparticles decreases the temperature curve.
SCIENTIFIC REPORTS
(2022)
Article
Thermodynamics
Javaria Akram, Noreen Sher Akbar, Monairah Alansari, Dharmendra Tripathi
Summary: This study focuses on the fluid flow and heat transfer characteristics of 10 W40-based titanium dioxide nanofluid subject to electroosmotic forces and peristaltic propulsion in a curved microchannel. The unique aspect of this study is the inclusion of variable thermophoretic and diffusion parameters in the modified Buongiorno model. The results indicate that maintaining a larger temperature difference strengthens buoyancy forces and facilitates fluid motion, but also leads to a decrease in the Nusselt number. It is also found that the temperature of the nanofluid decreases for a larger curvature parameter, corresponding to a less curved channel. Additionally, the electroosmotic flow parameters have a progressive impact on velocity and convective heat transfer.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
N. K. Ranjit, G. C. Shit, D. Tripathi
Summary: A mathematical model has been proposed to analyze the two-layered electrothermal flow of couple stress fluids via peristaltic propulsion, using a lubrication approach and Debye Huckel linearization to obtain the analytical solution. The study reveals that temperature decreases with increasing electrical double layer thickness, couple stress parameter, and Brinkman number, while it increases with Joule heating and thermal slip effects in the presence of thermal radiation.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Rajashekhar Choudhari, Hanumesh Vaidya, Fateh Mebarek-Oudina, Abderrahim Wakif, Manjunatha Gudekote, Kerehalli Vinayaka Prasad, Kuppalapalle Vajravelu, Shivaraya Keriyapa
Summary: A theoretical model is developed to simulate electro-kinetic transfer through peristaltic movement in a micro-channel, considering the effects of variable viscosity and wall properties. Long wavelength and small Reynolds number approximations are used to simplify the governing formulas, along with Debye-Huckel linearization. The perturbation technique is employed to solve the governing non-linear equations, with graphical outcomes presented for velocity and streamlines.
Article
Materials Science, Multidisciplinary
E. N. Maraj, Noreen Sher Akbar, I. Zehra, A. W. Butt, Huda Ahmed Alghamdi
Summary: The current article investigates the peristaltic transport of menthol electrolytes altered by an external electric field, which results in the formation of an electrical double layer. The effects of electroosmotic body forces on the base fluid with and without copper nanoparticles are studied. This research contributes to the understanding of the combined effects of electro-osmosis and peristalsis on trapping fluid volume inside a channel and suggests potential applications in drug design and delivery.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Physical
Zhenao Gu, Xiaoqiang An, Ruiping Liu, Lunqiao Xiong, Junwang Tang, Chengzhi Hu, Huijuan Liu, Jiuhui Qu
Summary: The study demonstrates a microfluidic photoelectrochemical architecture with enhanced efficiency and selectivity for solar-chemical synthesis. The efficient charge separation leads to a 3-fold enhancement in product yield and a typical reaction selectivity of 85%, which is significantly higher than conventional methods. Integration of the microfluidic photoanode with an oxygen reduction cathode results in a self-sustained photocatalytic fuel cell with remarkably high open circuit voltage and short-circuit current.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Physics, Multidisciplinary
Yasir Akbar, Hammad Alotaibi, Umer Javed, Mehvish Naz, Mohammad M. Alam
Summary: This study analyzes the flow of ethylene glycol (EG)- and boron nitride (BN)-based ionic mixture led by the combined impact of peristalsis and electroosmosis mechanisms. The results show that the velocity of the nanofluid can be regulated by adjusting the velocity and magnetic field strength, and the augmented pumping region improves when higher Darcy's numbers are assigned.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Engineering, Electrical & Electronic
Tuo Ma, Yousu Wang, Shixin Sun, Tingrui Pan, Baoqing Li, Jiaru Chu
Summary: In this article, a size-tunable droplet microfluidic system with an on-chip microfluidic peristaltic pump is developed, allowing for the fine-tuning of droplet size and frequency without changing the microfluidic chip design. The system has a small dead volume and minimal reagent waste, showing potential for encapsulation and precise analysis in small-volume samples.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Biochemical Research Methods
Ahmed Zeeshan, Arshad Riaz, Faris Alzahrani
Summary: The article focuses on mathematical modeling and analysis of flows in a rectangular duct with wall properties, considering the application of CNTs in a Newtonian base fluid. By comparing single-walled CNTs and multiwalled CNTs, the behavior of CNTs in water nanofluid is studied and analyzed.
Article
Chemistry, Analytical
Erik M. Werner, Benjamin X. Lam, Elliot E. Hui
Summary: Microfluidic droplet generation often requires a stabilization period of a few minutes until the droplet volume reaches monodisperse production. This initial period may lead to material loss, which is problematic when preparing droplets from limited samples. We propose a fully integrated device that utilizes on-chip pneumatic logic for controlling phase-optimized peristaltic pumping, resulting in rapid and stable droplet generation.
Article
Mechanics
M. Majhi, A. K. Nayak, B. Weigand
Summary: The main objective of this work is to enhance micromixing in lab-on-a-chip devices used in BioMEMS through the electrokinetic mechanism. A numerical study is conducted to investigate the mixing quantification of an electroosmotic micromixer with a nozzle-diffuser shaped channel. The study examines the design of the mixing chamber, the size of the inner obstacle, the conical angle of the channel, and the electric double layer height's influence on the flow inside the micromixer.
Article
Chemistry, Analytical
Mengren Wu, Yuan Gao, Amirreza Ghaznavi, Weiqi Zhao, Jie Xu
Summary: Efficient mixing of fluids is crucial for various biomedical and biochemical applications in lab-on-a-chip devices. This study explores electroosmosis micromixing in a lab-on-a-foil microfluidic device, achieving efficient micromixing using tooth-shaped planar electrodes. The study evaluates the mixing performance through intensity measurement and investigates the effects of frequency, flow rate, voltage amplitude, and number of electrode tooth pairs. The research demonstrates the potential for optimizing mixing performance in EOF-based micromixers and the fabrication of low-cost flexible electric microfluidic devices.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Muneerah Al Nuwairan, Basma Souayeh
Summary: The study examines the effects of different shapes of gold nanoparticles on the electro-magneto-hydrodynamic (EMHD) peristaltic propulsion of blood in a micro-channel. The research provides insights into the flow and thermal characteristics under various physical parameters.
Article
Physics, Applied
F. M. Abbasi, U. M. Zahid, Y. Akbar, Saba, M. B. B. Hamida
Summary: This study investigates the thermodynamic analysis of electroosmotic flow of Fe3O4-Cu/H2O hybrid nanofluid under peristaltic propulsion, considering factors such as electric field, Ohmic heating, magnetic field, viscous dissipation, heat sink/source, and mixed convection. The addition of nanoparticles reduces the temperature and entropy generation, while enhancing heat transfer rate. The study shows that the thermal performance of the hybrid nanofluid is more significant compared to conventional mono nanofluid and base fluid.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2022)
Article
Thermodynamics
D. Tripathi, J. Prakash, M. Gnaneswara Reddy, J. C. Misra
Summary: A numerical computation was conducted to analyze double diffusive convection in micropolar nanofluids flow driven by peristaltic pumping in an asymmetric microchannel, considering thermal radiation and an external magnetic field. The study examined the influence of various parameters on flow characteristics and simulated the impact of Soret and Dufour parameters. The model is applicable to chemical fraternization/separation procedures and various thermal management systems.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Debojit Sharma, Subhankar Mahapatra, Subrat Garnayak, Vaibhav K. Arghode, Aditya Bandopadhyay, S. K. Dash, V. Mahendra Reddy
Summary: The study developed a reduced chemical mechanism for high-temperature combustion of H-2/CO/C-1-C-4 compounds, which can accurately reproduce ignition and combustion characteristics. It has been validated through numerical application in an industrial gas swirl burner and shown to provide better scope for studying the combustion characteristics of C-1-C-4 hydrocarbons under different pressure conditions and compositions.
Article
Mechanics
Bimalendu Mahapatra, Aditya Bandopadhyay
Summary: This numerical study investigates the mixed electroosmotic and pressure-driven transport of an Oldroyd-B fluid through a microchannel with high surface charge modulated walls. The study shows that enhanced fluid elasticity leads to the generation of asymmetric flow structures inside the microchannel, and increasing the strength of surface potential or reducing the thickness of the electrical double layer can greatly enhance the fluid flow performance. The results highlight the importance of electrochemical parameters and the complex interaction of fluid rheology and asymmetric surface potential in altering the net-throughput inside the microchannel for bio-fluid transport.
Article
Mechanics
Bimalendu Mahapatra, Aditya Bandopadhyay
Summary: The study focuses on micro-confined electroosmotic flow of an Oldroyd-B fluid over a surface with asymmetric charge modulation. Analytical solutions and numerical simulations were used to analyze the problem, showing excellent agreement in limiting conditions. The research highlights changes in fluid flow pattern, electroosmotic slip velocity, net volumetric throughput, and ionic current due to variation in physicochemical conditions and fluid viscoelastic properties.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2021)
Article
Biochemical Research Methods
Bimalendu Mahapatra, Aditya Bandopadhyay
Summary: The study reveals that the maximum slip velocity occurs when the skimming layer thickness is much smaller compared to the electrical double layer thickness, while the slip velocity decreases to zero when the skimming layer thickness is larger. Enhanced fluid elasticity creates asymmetric flow structures inside the microchannel, which can be achieved by introducing an asymmetric surface charge along the channel walls.
Article
Chemistry, Multidisciplinary
Saptarshi Banerjee, Sujay Kumar Biswas, Nandita Kedia, Rakesh Sarkar, Aratrika De, Suvrotoa Mitra, Subhanita Roy, Ranjini Chowdhury, Shuddhasattwa Samaddar, Aditya Bandopadhyay, Indranath Banerjee, Subhasis Jana, Ritobrata Goswami, Shanta Dutta, Mamta Chawla-Sarkar, Suman Chakraborty, Arindam Mondal
Summary: The PINAT technology is a platform for diagnosing pathogen-associated infections, offering a unified single-step, single-chamber procedure in a portable device with mobile app integration. It has demonstrated high sensitivity and specificity in various settings, making it suitable for resource-limited environments to meet the needs of underserved populations.
Article
Mechanics
S. Dehe, M. Hartmann, A. Bandopadhyay, S. Hardt
Summary: The instability of the interface between a dielectric and conducting liquid under a spatially homogeneous interface-normal time-periodic electric field is studied. Experimental and theoretical methods are used to investigate the spatial structure of the excited Faraday waves and the influence of liquid viscosities on the instability. The study confirms good agreement with theoretical predictions and provides insights into controlling electrostatically driven instabilities.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Bimalendu Mahapatra, Aditya Bandopadhyay
Summary: This paper numerically investigates the mixing characteristics of an Oldroyd-B fluid flowing through a micro-channel driven by both electroosmotic force and pressure gradient. The study finds that increasing the relative strength of electroosmotic forcing and pressure gradient improves mixing efficiency. The results also show that fluid rheology and surface potential influence mixing efficiency.
Article
Chemistry, Multidisciplinary
Sampad Laha, Aditya Bandopadhyay, Suman Chakraborty
Summary: The article introduces a smartphone-based sensor technology for the rapid screening of anemic patients by analyzing the pattern formed by a blood drop on a paper strip. This technique provides label-free and accurate screening capabilities, making it a crucial decision-making tool in resource-limited settings without the need for delicate reagents and skilled technicians.
Article
Physics, Fluids & Plasmas
Sebastian Dehe, Maximilian Hartmann, Aditya Bandopadhyay, Steffen Hardt
Summary: This study investigates the response of the interface between a dielectric and a conducting liquid to an oscillatory electric field. The critical voltage, interfacial oscillation frequency, and dominant wavelengths are determined using an algorithm based on light refraction and compared with theoretical predictions. The study reveals that the mixing ratio in the AC/AC driving mode can induce a jump in the pattern wavelength, while in the AC/DC driving mode, the response wavelength can be continuously adjusted by varying the admixture of the DC component.
PHYSICAL REVIEW FLUIDS
(2022)
Review
Physics, Multidisciplinary
Aditya Bandopadhyay, Prasanta Kumar Das
Summary: Paper-based analytical devices have a wide range of applications and are affordable, easy to operate, and do not require specialized equipment. This technology has significant applications in medical diagnosis, energy generation, environmental monitoring, and food quality control.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2023)
Review
Physics, Multidisciplinary
Prashant Narayan Panday, Aditya Bandopadhyay, Prasanta Kumar Das
Summary: Active matter systems at a fluid-fluid interface, such as air and water, have been the subject of great interest due to their potential applications. In this review, we study the interactions and behaviors of such active matter, known as surfing, caused by imbalanced stresses from various factors like surface tension, temperature, interface heterogeneity, chemical reactions, and surface acoustic waves. We also discuss the division, fusion, and coalescence of liquid drops under different gradients, particle motion under externally applied electric and magnetic fields, as well as the structure, synthesis methods, dynamics, and critical applications of half-coated self-propelled active Janus particles.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2023)
Article
Physics, Multidisciplinary
Bimalendu Mahapatra, Aditya Bandopadhyay
Summary: In computational models of microchannel flows, the Helmholtz-Smoluchowski slip velocity boundary condition is commonly used to approximate the motion of the electric double layer. However, this approximation is not effective for flow involving complex fluids and spatially varying surface potential distribution. This analysis shows the existence of a modified electroosmotic slip velocity for viscoelastic fluids, which is dependent on Deborah number and viscosity ratio and differs from the slip velocity of Newtonian fluids. The proposed slip velocity model can be used to approximate the motion of the electric double layer in computational models of microchannel flows.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2023)
Article
Mechanics
Debojit Sharma, Subrat Garnayak, Aditya Bandopadhyay, S. K. Dash, Mahendra Reddy Vanteru
Summary: An experimental and numerical model is developed to determine the exergy balance in the process of LPG/air combustion in a gas turbine combustor. The study focuses on the influence of vortex shedding and recirculation on entropy production and exergy efficiency. The results show that thermal conduction contributes to 50% of the entropy generation, while the exergy efficiency peaks at 79.41% under fuel-rich conditions.
Article
Engineering, Chemical
Bimalendu Mahapatra, Aditya Bandopadhyay
Summary: Geometrically modified microchannels fabricated using stereolithography are used to study micromixing of polymeric solutions. Experimental and numerical analyses were conducted to evaluate the validity of Newtonian fluid flow in these channels. The presence of inertio-elastic instability in the geometrically modified microchannels for viscoelastic fluid transport is observed, which significantly enhances the mixing efficiency. This analysis provides important insights for the cost-effective design and operation of microfluidic devices handling viscoelastic fluids, particularly in designing passive micromixers for bio/polymeric fluids transportation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Thermodynamics
Manoj Kumar Nayak, Vinay Shankar Pandey, Dharmendra Tripathi, Noreen Sher Akbar, Oluwole D. Makinde