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High power density and bias-free reverse electrowetting energy harvesting using surface area enhanced porous electrodes
Article presents a novel approach for enhancing power output from a REWOD energy harvester by significantly increasing the total available surface area using perforated silicon wafer electrodes.
Date:
November 6, 2021
Creator:
Adhikari, Pashupati R.; Reid, Russell C. & Mahbub, Ifana
System:
The UNT Digital Library
Characterization of Soft Tooling Photopolymers and Processes for Micromixing Devices with Variable Cross-Section
Article characterizing an assortment of photopolymers and stereolithography processes to produce 3D-printed molds and polydimethylsiloxane (PDMS) castings of micromixing devices. The study shows that 3D-printed soft tooling can provide other benefits such as multiple cross-sections and other potential layouts on a single mold.
Date:
September 29, 2020
Creator:
Martínez-López, J. Israel; Cervantes, Héctor Andrés Betancourt; Iturbe, Luis Donaldo Cuevas; Vázquez, Elisa; Naula, Edisson A.; Martínez López, Alejandro et al.
System:
The UNT Digital Library
Extended CT Void Analysis in FDM Additive Manufacturing Components
This article provides an extended analysis of void shape by means of X-ray computed tomography (CT) applied to fused deposition modeling (FDM) samples. Furthermore, a relation between the tensile mechanical properties and digital void measurements is established. The results lead to the formulation of a novel criterion that predicts the mechanical behavior of AM components.
Date:
July 26, 2020
Creator:
Hernandez-Contreras, Adriana; Ruiz-Huerta, Leopoldo; Caballero-Ruiz, Alberto; Moock, Verena & Siller Carrillo, Héctor Rafael
System:
The UNT Digital Library
Probabilistic Seismic Assessment of CoSPSW Structures Using Fragility Functions
This article presents a study on the probabilistic assessment of the seismic performance and vulnerability of corrugated steel plate shear walls (CoSPSWs) using fragility functions.
Date:
June 18, 2022
Creator:
Tan, Zhilun; Zhao, Quihong; Zhao, Yu & Yu, Cheng
System:
The UNT Digital Library
Pb(ii) adsorption from aqueous solution by an aluminum-based metal organic framework–graphene oxide nanocomposite
This article is motivated by the promise of emerging nanocomposites and reports for the first time the adsorption performance of an aluminum-based MOF (MIL-53(Al)) and GO nanocomposite for Pb(II) removal from aqueous solutions.
Date:
March 22, 2021
Creator:
Chowdhury, Tonoy; Zhang, Lei; Zhang, Junqing & Aggarwal, Srijan
System:
The UNT Digital Library
The hygroscopicity of moso bamboo (Phyllostachys edulis) with a gradient fiber structure
This article studies the hygroscopicity of moso bamboo (Phyllostachys edulis) with a gradient fiber structure assessed by a dynamic vapor sorption (DVS) apparatus and fitted with a Haillwood–Horrobin (H–H) model. The effects of the chemical composition, gradient fiber structure, and mesopore structure of the bamboo were also investigated. The results demonstrate that the hygroscopicity of bamboo gradually increases from the outer to the inner layer along the thickness of the culm wall, which is related to the gradient distribution of the fibers. The structure–function relationships between the chemical composition, multi-scale structure, and hygroscopicity identified in this study provide a theoretical basis for bamboo drying and storage technology, as well as the processing and application of bamboo fiber-based composites.
Date:
October 15, 2021
Creator:
Wei, Xin; Wang, Ge; Smith, Lee M. & Jiang, Huan
System:
The UNT Digital Library
Effect of amorphous cellulose on the deformation behavior of cellulose composites: molecular dynamics simulation
This article is a study aimed at predicting and enhancing the properties of the blend, as well as exploring the mechanism, of a polylactic acid (PLA)/amorphous cellulose composite system through molecular characterization. The static properties of the amorphous cellulose/PLA blend model and the mechanical response of the material under uniaxial tension were studied by molecular dynamics simulation to establish the structure–property relationship.
Date:
June 8, 2021
Creator:
Ren, Zechun; Guo, Rui; Zhou, Xinyuan; Bi, Hongjie; Jia, Xin; Xu, Min et al.
System:
The UNT Digital Library
Infrared radiative switching with thermally and electrically tunable transition metal oxides-based plasmonic grating
Article says that plasmonic and phase transition has been blended to gain the infrared radiative switching which is tunable with temperature or voltage supply. This is applied via vanadium dioxide, tungsten trioxide, and molybdenum trioxide as transition metal oxides (TMO), the authors state that the work expands the usage of transition metal oxides in infrared region with larger contrast.
Date:
March 6, 2022
Creator:
Araki, Ken & Zhang, Richard Z.
System:
The UNT Digital Library
Fiberboard Made from Scrap Denim: Characterization of its Properties by Effective Bulk Modulus Elastography
Article describes how fiberboards from scrap denim were fabricated using two different resins, melamine urea formaldehyde (MUF) and polymeric methylene diphenyl diisocyanate (pMDI). Resin content and MUF-pMDI weight ratio were studied. Physical and mechanical tests determined the modulus of elasticity (MOE), modulus of rupture (MOR), internal bond (IB), thickness swell (TS), and water absorption (WA).
Date:
March 20, 2023
Creator:
Shi, Sheldon; Cui, Zhiying; Jin, Yuqi; Smith, Lee M.; Wu, H. Felix & Neogi, Arup
System:
The UNT Digital Library
High-Fidelity Conjugate Heat Transfer Simulation of Micro-Channel Heat Exchanger
Article describes how high-fidelity conjugate heat transfer simulations are used to model a micro-channel heat exchanger (MCHE) in a crossflow to study its thermal-hydraulic performance. Three different microchannel geometries, namely circular, triangular, and square with louver-shaped fins, are considered.
Date:
July 1, 2023
Creator:
Ahmed, Hossain; Sadat, Hamid & Nasrazadani, Seifollah
System:
The UNT Digital Library
Comparison of Thermal Effectiveness and Crevice Corrosion Risk of Fin Geometry on All-Aluminum Microchannel Heat Exchangers
Article all-aluminum microchannel heat exchangers have recently gained popularity in the heating, ventilation, and air conditioning industry. Despite their attractive thermal performance design, these heat exchangers make coils used in automotive, commercial, and residential applications prone to crevice corrosion. This study uses high-fidelity conjugate heat transfer simulations to model a micro channel heat exchanger system that includes fins and tubes with crossflow to compare their thermal effectiveness to gain insight into potential crevice corrosion of the MCHE alloy.
Date:
June 12, 2023
Creator:
Ahmed, Hossain; Nasrazadani, Seifollah & Sadat, Hamid
System:
The UNT Digital Library
Thermal heat transfer and energy modeling through incorporation of phase change materials (PCMs) into polyurethane foam
Article describes how decreasing HVAC energy consumption through insulation effectiveness enables low energy use, low carbon emissions, and high thermal comfort in sustainable buildings. In this paper, two PCMs with transition temperature above and below the outdoor temperature incorporated in highly porous flexible polyurethane foam were evaluated using a one-dimensional (1D) foam core panel built in COMSOL Multiphysics®.
Date:
June 3, 2023
Creator:
Nandy, Aditi; Houl, Yassine; Zhao, Weihuan & D'Souza, Nandika Anne, 1967-
System:
The UNT Digital Library
Novel thin polymeric magnetic membranes study for applications in the future biomedical devices
Article describes how biomedical devices such as pumping/mixing fluids, cell-culturing, and drug delivery often use different actuation methods. In regard to magnetic actuation, membranes with a local distribution of magnetic particles are investigated and compared to membranes with randomly distributed magnetic particles, which in turn may enhance the actuation performance for certain applications.
Date:
November 16, 2022
Creator:
Manzo, Maurizio & Bakaraju, Megha
System:
The UNT Digital Library
Study on emission spectral lines of hematite and magnetite for purity’s differentiation
Article proposes using emission spectra to investigate the purity of hematite (α-Fe₂O₃) and magnetite (Fe₃O₄).
Date:
October 22, 2020
Creator:
Manzo, Maurizio; Ahmed, Hossain & Nasrazadani, Seifollah
System:
The UNT Digital Library
Advancing Reverse Electrowetting-on-Dielectric from Planar to Rough Surface Electrodes for High Power Density Energy Harvesting
Article presenting electrical and multiphysics-based modeling approaches of REWOD energy harvester using structured rough surface electrodes. By enhancing the overall available surface area, an increase in the overall capacitance is achieved.
Date:
December 15, 2021
Creator:
Adhikari, Pashupati R.; Patwary, Adnan B.; Kakaraparty, Karthik; Gunti, Avinash; Reid, Russell C. & Mahbub, Ifana
System:
The UNT Digital Library
Characterize traction–separation relation and interfacial imperfections by data-driven machine learning models
This article combines machine learning (ML), finite element analysis (FEA), and empirical experiments to develop data-driven models that characterize interfacial mechanical properties precisely. It also provides a code package containing trained ML models, allowing other researchers to establish T–S relations for different material interfaces.
Date:
July 12, 2021
Creator:
Ferdousi, Sanjida; Chen, Qiyi; Soltani, Mehrzad; Zhu, Jiadeng; Cao, Pengfei; Choi, Wonbong et al.
System:
The UNT Digital Library
Preparation of a strong, high prepressing intensity, and multifunction soybean protein adhesive by using hyperbranched functional polymer
Article states that the preparation of a soybean protein adhesive with good prepressing intensity, mildew proof, flame retardant, and high bond strength are conducive to the wide application of a soybean protein adhesive, which is important but challenging for the wood-based panel industry. In this study, two hyperbranched functional polymers were designed.
Date:
January 9, 2023
Creator:
Liu, Zheng; Liu, Tao; Zhang, Jieyu; Li, Yue; Luo, Jing; Li, Jianzhang et al.
System:
The UNT Digital Library
Anthropo-fidelic behavior of elastic-plastic lattice structures
Article discusses how vat photopolymerization is used to construct triply periodic minimal surfaces (TPMS) to match human heel pad stiffness. This work substantiates the suitability of latticed models to reach the stiffness of the heel pad chambers.
Date:
February 24, 2023
Creator:
Haney, Christopher W. & Siller Carrillo, Héctor Rafael
System:
The UNT Digital Library
Branching of Titanium Nanorods
This article reports that Ti nanorod branching occurs at a low homologous temperature of 0.28 based on physical vapor deposition and characterizations using electron microscopy and X-ray diffraction. The insight into conditions for branching, together with the determination of the morphology and crystal orientation of the branches, lay the foundation for further studies of branching mechanisms and driving force.
Date:
April 22, 2021
Creator:
Yussuf, Nosirudeen Abayomi & Huang, Hanchen
System:
The UNT Digital Library
Unravelling the Influence of Surface Modification on the Ultimate Performance of Carbon Fiber/Epoxy Composites
Article asserts that the overall performance of polymer composites depends on not only the intrinsic properties of the polymer matrix and inorganic filler but also the quality of interfacial adhesion. The authors report carbon fiber (CF)/epoxy composites with improved interfacial adhesion by covalent bonding between CFs and the epoxy matrix, which leads to the improved ultimate mechanical properties and enhanced thermal aging performance.
Date:
September 28, 2022
Creator:
Demchuk, Zoriana; Zhu, Jiadeng; Li, Bingrui; Zhao, Xiao; Islam, Nurul Md.; Bocharova, Vera et al.
System:
The UNT Digital Library
A review on the modeling and validation of biomass pyrolysis with a focus on product yield and composition
Article reviewing the modeling and verification of products derived from biomass pyrolysis and discussing the possible solutions towards more accurate modeling of biomass pyrolysis.
Date:
March 1, 2021
Creator:
Xia, Changlei; Cai, Liping; Zhang, Haifeng; Zuo, Lei; Shi, Sheldon & Lam, Su Shiung
System:
The UNT Digital Library
A Computational Study on the Aeroacoustics of a Multi-Rotor Unmanned Aerial System
Article studying the noise generated by a quadrotor biplane unmanned aerial system (UAS) for various conditions in terms of the UAS pitch angle, propellers rotating velocity (RPM), and the UAS speed to understand the physics involved in its aeroacoustics and structure-borne noise.
Date:
October 18, 2021
Creator:
Heydari, Morteza; Sadat Hosseini, Seyed Hamid & Singh, Rajneesh
System:
The UNT Digital Library
A self-powered wireless motion sensor based on a high-surface area reverse electrowetting-on-dielectric energy harvester
Article presents a motion-sensing device with the capability of harvesting energy from low-frequency motion activities. Based on the high surface area reverse electrowetting-on-dielectric (REWOD) energy harvesting technique, mechanical modulation of the liquid generates an AC signal, which is modeled analytically and implemented in Matlab and COMSOL.
Date:
March 8, 2022
Creator:
Tasneem, Nishat Tarannum; Biswas, Dipon K.; Adhikari, Pashupati R.; Gunti, Avinash; Patwary, Adnan B.; Reid, Russell C. et al.
System:
The UNT Digital Library
A dimensional assessment of small features and lattice structures manufactured by laser powder bed fusion
This article presents a detailed investigation on the influence of building orientation and feature dimensions in laser powder bed fusion (L-PBF) parts.
Date:
February 28, 2022
Creator:
López-García, Carlos; García-López, Erika; Siller Carrillo, Héctor Rafael; Sandoval-Robles, Jesús A. & Rodríguez, Ciro A.
System:
The UNT Digital Library