Article
Thermodynamics
Jeongmin Lee, Steven J. Darges, Issam Mudawar
Summary: This study investigates Density Wave Oscillation (DWO) and Parallel Channel Instability (PCI) in a microchannel heat sink, showing significant variations in bubble growth and flow patterns among channels under different mass velocities and heat fluxes. The effects of instabilities in the heat sink are also found to impact other components of the flow loop. The parametric trends for PCI are explored using three different types of stability maps, which demonstrate varying abilities in distinguishing stable and unstable operations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
A. Hamrang, M. Abdollahzadeh, A. Moradi Bilondi, F. Bagherighajari, S. M. Rahgoshay, J. C. Pascoa
Summary: This study compares the performance of a PEMFC with conventional parallel serpentine flow fields and parallel serpentine-baffled flow fields. The results show that the PSBFF design can significantly improve cell performance, especially at higher pressure, temperature, and stoichiometric ratio.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Mechanics
M. Tsoy, S. Skripkin, I. Litvinov
Summary: Two different scenarios of spiral vortex breakdown are experimentally observed and numerically investigated in a swirl flow into a conical diffuser. The primary spiral vortex breakdown occurs near the inlet of the conical diffuser when the cone angle beta is greater than 3 degrees. The secondary spiral vortex breakdown occurs at the exit of the cone when beta is less than or equal to 3 degrees. Additionally, the coexistence of two spiral vortices is observed, and their reasons are visualized and explained for the first time.
Article
Thermodynamics
Jingtian Wu, Yun Wang
Summary: In this study, flow maldistribution in a system of two parallel thin micro-channels with shared inlet and outlet manifolds was experimentally investigated. The ratio of gas flow rate in the two-phase flow channel to the single-phase flow channel was defined as a direct measure of flow maldistribution. Different trends in Q(2)/Q(1) were observed at various liquid flow rate levels, indicating potential influences of liquid blockage near channel exits. It was also suggested that the two-phase multiplier phi obtained from single channel testing may not be suitable for measuring flow maldistribution in multi-channel systems.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Gaurav Anand, Samira Safaripour, Craig Snoeyink
Summary: High strength AC electric fields create body forces in a dielectric medium between two electrodes. These forces are caused by variations in permittivity at interfaces and changes in thermodynamic properties. The height rise of the medium is used as a simple way to study these forces. This study focuses on the interplay between solution conductivity, applied electric field, and solution height/temperature behavior.
Article
Mechanics
Yuan Xiao, Wenxian Lin
Summary: A linear temporal stability analysis was conducted on non-parallel free cross sheared flow, revealing a gradual transition of instability between different eigenfunction modes, with the cross shear ratio and the ratio between orthogonal and primary wavenumbers playing key roles.
Article
Multidisciplinary Sciences
Kanayo Kenneth Asogwa, B. Shankar Goud, Nehad Ali Shah, Se-Jin Yook
Summary: This study investigates the influence of Dufour effect, activation energy, and heat generation on the electromagnetohydrodynamic flow of a hyperbolic tangent nanofluid over a stretching sheet. The results show that the activation energy retards the concentration distribution of the nanofluid, while the temperature rise is related to the increase in Dufour effect. The electromagnetohydrodynamic variable affects the velocity distribution and the heat transfer rate is inhibited when certain parameters are enhanced.
SCIENTIFIC REPORTS
(2022)
Article
Mechanics
Zhi Fu Li, Guo Xiong Wu, Kang Ren
Summary: This study examines wave radiation and diffraction problems of a body floating in an open water channel confined by two semi-infinite ice sheets. It uses linearized velocity potential theory for fluid flow and a thin elastic plate model for the ice sheet. By deriving the Green function and boundary integral equation, the research shows that the problem can be solved by discretizing the body surface, and offers detailed results on hydrodynamic forces and wave interactions in the channel.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Mohamed Sadok Guellouz
Summary: This experimental investigation aimed to determine the onset conditions for the formation of large-scale structures in flows through two parallel fins. It confirmed the presence of coherent structures, determined the critical Reynolds number for their formation, and correlated it to local flow parameters. The study documented the structures' axial spacing, convective speed, and their relationship with geometrical and dynamical parameters.
Article
Mechanics
B. M. Shankar, I. S. Shivakumara
Summary: The study investigates the linear stability of plane porous-Couette flow with a uniform vertical throughflow using the Brinkman-extended Darcy equation, revealing the presence of different onset modes due to the throughflow. The impacts of the throughflow dependent modified Reynolds number and the modified porous parameter on the critical values defining instability thresholds are significant. The stability characteristics of this flow in a porous medium with throughflow differ notably from cases with no throughflow and non-porous conditions.
Article
Energy & Fuels
Benjamin A. W. Mowbray, David J. Dvorak, Nina Taherimakhsousi, Curtis P. Berlinguette
Summary: This study demonstrates the significant impact of catalyst ink solvent on the performance and properties of spray-coated cathode gas diffusion electrodes (GDEs), with the choice of solvent influencing the faradaic efficiency for CO. The solvent used during catalyst deposition affects the surface area, hydrophobicity, and capillarity of GDE catalyst layers, and ethanol is shown to promote moderate ionomer aggregation and yield the highest performing GDEs.
Article
Chemistry, Physical
Meng Yue, Jingwang Yan, Huamin Zhang, Qiong Zheng, Xianfeng Li
Summary: The study suggests that flow channel design can improve the performance of trapezoid flow batteries by reducing polarization and capacity loss. Furthermore, the impact of parameters such as channel depth and electrode porosity on flow patterns is discussed, highlighting the importance of further geometrical optimization.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Joseph R. Maestas, Fuduo Ma, Ning Wu, David T. Wu
Summary: This study explores the mechanism of colloidal particles assembling into quasi-two-dimensional materials under externally applied electric fields. The research identifies previously unobserved structures and proposes a simple method to control the ratio of particles between different planes.
Article
Mechanics
Yuhao Yan, Weilin Chen, Zhimeng Zhang, Chunning Ji, Narakorn Srinil
Summary: In this study, the wakes behind side-by-side circular cylinders were investigated using direct numerical simulation. Several asymmetric wake patterns were discovered and analyzed, providing a deeper understanding of asymmetric flows.
Article
Physics, Multidisciplinary
Adebowale Martins Obalalu, Olusegun Adebayo Ajala, Akintayo Oladimej Akindele, Saheed Alao, Adepoju Okunloye
Summary: This article discusses the electromagnetohydrodynamic Casson Nanofluid flow induced by a stretching Riga plate in a non-Darcian porous medium under the influence of various factors. The study bridges the gap by considering temperature-dependent thermophysical properties and uses different methods for solving and analyzing the results. The findings of this research provide insights for engineers designing applications with high heat and mass transfer rates.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Electrochemistry
Shilpa, Rudra Kumar, Ashutosh Sharma
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2018)
Article
Electrochemistry
Rudra Kumar, Thiruvelu Bhuvana, Prabhakar Rai, Ashutosh Sharma
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)
Article
Chemistry, Multidisciplinary
Sandip Patil, Tushar Deshpande, Nayantika Chaudhari, Yogesh R. G. Singh, Janhavi Raut, Yogesh M. Joshi, Ashutosh Sharma
Article
Chemistry, Multidisciplinary
Rudra Kumar, Prashant Kumar Gupta, Prabhakar Rai, Ashutosh Sharma
NEW JOURNAL OF CHEMISTRY
(2018)
Article
Chemistry, Physical
Abir Ghosh, Dipankar Bandyopadhyay, Ashutosh Sharma
Article
Chemistry, Multidisciplinary
Rudra Kumar, Thiruvelu Bhuvana, Ashutosh Sharma
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2018)
Article
Chemistry, Multidisciplinary
Priyanka Sachan, Radhakant Singh, Prabhat K. Dwivedi, Ashutosh Sharma
Correction
Nanoscience & Nanotechnology
Gargi Mishra, Souryadeep Bhattacharyya, Vipul Bhatia, Bushra Ateeq, Ashutosh Sharma, Sri Sivakumar
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Engineering, Chemical
Kunal Mondal, Tanmoy Maitra, Alok Kumar Srivastava, Gorakh Pawar, Michael D. McMurtrey, Ashutosh Sharma
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Chemistry, Multidisciplinary
Surbhi Sharma, Soumen Basu, Nagaraj P. Shetti, Kunal Mondal, Ashutosh Sharma, Tejraj M. Aminabhavi
Summary: Graphitized carbon nanofibers (CNFs) have excellent properties and wide applications in energy sectors. This perspective summarizes the production methods, structural aspects, and energy applications of graphitized CNFs, and discusses the recent developments in lithium-ion batteries, lithium-sulfur batteries, vanadium redox flow batteries, supercapacitors, and water splitting.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Naval Singh, Ankur Verma, Priyanka Sachan, Ashutosh Sharma, Manish M. Kulkarni
Summary: Self-organized wrinkling instabilities in thin polymer films have led to the development of versatile surface patterning techniques, with the potential to create highly directional patterns using electron beam lithography for nano- and microfluidic device fabrication. The composition of the solvent-nonsolvent mixture and the surface energy of the substrate play crucial roles in the formation of wrinkles, which can be exploited to generate a mesh of microwires.
ACS APPLIED POLYMER MATERIALS
(2021)
Review
Nanoscience & Nanotechnology
Aayushi Kundu, Nagaraj P. Shetti, Soumen Basu, Kunal Mondal, Ashutosh Sharma, Tejraj M. Aminabhavi
Summary: Carbon nanofibers (CNFs) have enormous potential in fields such as energy, catalysis, biomedicine, sensing, and environmental science. This review provides an overview of CNF fabrication methods and discusses various sensing applications.
ACS APPLIED BIO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Aayushi Kundu, Nagaraj P. Shetti, Soumen Basu, Kunal Mondal, Ashutosh Sharma, Tejraj M. Aminabhavi
Summary: Carbon nanofibers (CNFs) have enormous potential in sensing applications and various fields due to their unique structure and properties. This review provides insights into different fabrication methods and functionalization of CNFs, as well as detailed discussions on their applications in sensing various substances and human motion monitoring.
ACS APPLIED BIO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Vinay Mohania, Tushar D. Deshpande, Yogesh R. G. Singh, Sandip Patil, Rahul Mangal, Ashutosh Sharma
Summary: The study introduces a simple and cost-effective method for fabricating porous PDMS adhesive films and examines the impact of different fabrication approaches on film adhesion properties. By adding water or ethyl acetate as solvents to form emulsions, the pore structure and surface roughness of the films can be controlled to enhance contact and adhesion to the substrate.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Rudra Kumar, Thiruvelu Bhuvana, Ashutosh Sharma
NEW JOURNAL OF CHEMISTRY
(2020)