Article
Thermodynamics
M. Ijaz Khan, Kamel Al-Khaled, Sami Ullah Khan, Taseer Muhammad, Hassan Waqas, Adel M. El-Refaey, M. Imran Khan
Summary: The study proposed the double diffusion thermal mechanism of viscoelastic nano-materials and used electrically conducting generalized micropolar nanofluid to predict non-Newtonian behavior. The results showed that nanofluid temperature decreased with vortex viscosity parameter, while the local Nusselt and Sherwood numbers increased with vortex viscosity parameter.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Physics, Multidisciplinary
Shuvojit Paul, Ashreya Jayaram, N. Narinder, Thomas Speck, Clemens Bechinger
Summary: In this study, we experimentally determined the force exerted by a bath of active particles onto a passive probe as a function of its distance to a wall and compared it to the measured averaged density distribution of active particles around the probe. We demonstrated that both quantities are directly related to each other, up to a factor, within the framework of an active stress. Our results were in excellent agreement with a minimal numerical model and confirmed a general and system-independent relationship between the microstructure of active particles and transmitted forces.
PHYSICAL REVIEW LETTERS
(2022)
Article
Polymer Science
Fatima Hammoud, Julie Kirschner, Meline Carre, Wolfgang Paulus, Anna-Maria Cristadoro, Michael Schmitt, Jacques Lalevee
Summary: Frontal polymerization (FP) has attracted increasing interest for the polymerization of thick materials with high fillers content. This study reports recent advances in controllable and predictive behavior for photoinduced frontal photopolymerization using tert-butyl peroxybenzoate (Luperox-P) as a thermal initiator. The experiments investigate various factors and their influence on photoinduced frontal polymerization, resulting in a statistical design of experiments.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Review
Chemistry, Physical
Sahar Ayachi, Xin He, Hyo Jae Yoon
Summary: Thermoelectric materials are able to convert waste heat into electricity, offering a sustainable solution for power generation. Solar thermoelectric generation is a promising application that utilizes solar radiation to heat one side of a thermoelectric device while keeping the other side cool. This review examines different designs of solar thermoelectric generators, including thermoelectric elements, optical concentrators, solar absorbers, and other techniques to enhance their performance. Despite ongoing research, experimental solar thermoelectric efficiencies remain below 10%, and theoretical efficiencies do not exceed 20%. The review provides an overview of the current state of solar thermoelectrics, suggests areas for improvement, and predicts the future of these devices.
ADVANCED ENERGY MATERIALS
(2023)
Article
Thermodynamics
Kumar Amit, Aparesh Datta, Nirmalendu Biswas, Sudev Das, Pritam Das
Summary: A novel microsink with geometric structures has been designed to cool compact tiny-sized electronic devices more effectively at lower pressure drop. Through a three-dimensional numerical study, it was found that the channel with triangular cavity, secondary branch, and blockage has the highest thermal performance and the lowest entropy generation number among others, indicating the best heat transfer efficiency.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Applied
Yangyang Xin, Shizhuo Xiao, Yulian Pang, Yingquan Zou
Summary: This paper investigates the use of Near-Infrared sensitizer induced Radical Induced Cationic frontal polymerization (RICFP) in vinyl ethers and epoxides. It was found that vinyl ethers exhibited higher reactivity and conversion rates compared to other cationic polymerizable monomers. The study also explored the use of a three-component system with NIR sensitizer, iodonium salt, and thermal initiator in RICFP.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Chemistry, Multidisciplinary
Minghong Qi, Dong Wang, Pei-Chao Cao, Xue-Feng Zhu, Cheng-Wei Qiu, Hongsheng Chen, Ying Li
Summary: This article discusses the topological properties of heat diffusion and experimentally verifies the existence of topological edge states. The research findings are of great significance for exploring novel thermal management applications.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Maan Al-Zareer, Carlos Da Silva, Cristina H. Amon
Summary: This paper introduces a novel thermal characterization approach for pouch lithium-ion batteries, which determines key thermophysical properties and heat generation rates through a combination of experimental and numerical simulation processes. The approach is practical, cost-effective, and does not require extensive equipment or detailed internal structure information.
JOURNAL OF POWER SOURCES
(2021)
Article
Thermodynamics
Zhangjie Chen, Yanzhou Qin, Zizhe Dong, Jiayang Zheng, Yuhang Liu
Summary: Thermal management is crucial for the life and safety of lithium-ion batteries. Accurate calculation of heat generation and minimizing heat production can improve battery thermal management. However, the specific contributions of polarization heat, ohmic heat, and reversible heat to total heat generation, as well as their sensitivities to battery material parameters, have not been well studied, posing challenges for battery thermal management.
APPLIED THERMAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Roland Taschner, Robert Liska, Patrick Knaack
Summary: Iodonium antimonates and borates are widely used initiators in polymerization, while cyanide-ligated borane B2 is a new type of initiator with high reactivity and cost-effectiveness.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Yucong Lin, Weijian Deng, Yueyue Rui, Yun Liu, Gang Lu, Jie Liu
Summary: This study improves the thermal conductivity of polymer composites by using liquid resin and 3D printing technology, providing a new method for enhancing the thermal conductivity of photocured polymers.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Chemical
Francisco Kisuka, Colin Hare, Chuan-Yu Wu
Summary: This study investigates the heat generation and contact temperatures during particle interactions. Both theoretical models and a finite element method (FEM) model are employed, and they agree well with each other. The study also identifies the dependence of temperature profiles on heat generation and material properties, and proposes simple theoretical solutions for further research on heat generation in granular flows.
Article
Thermodynamics
Seyed Pooya Aghili Yegane, Alibakhsh Kasaeian
Summary: This study presents the thermal management of a flat plate solar collector using entropy generation analysis in the presence of porous metal foam and Al2O3-Cu/water hybrid nanofluid. The effects of key factors such as porous media, nanofluid volume fraction, and magnetic field on entropy generation were investigated. Results show that adding nanoparticles can reduce irreversibility under certain conditions of magnetic field strength and Reynolds number.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Aloisi Somer, Andressa Novatski, Francisco Carlos Serbena, Ervin Kaminski Lenzi
Summary: This study analyzes the heat propagation in non-homogeneous solids by considering fractional differential operators and examining the effects of superdiffusion and subdiffusion on the photoacoustic signal generated by light sources.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Nuclear Science & Technology
Weixiong Chen, Kai Hui, Xingyun Wang, Shaodan Li, Quanbin Zhao, Zhenxing Zhao, Dongtong Chong, Junjie Yan
Summary: This study investigates the thermal stratification phenomenon during the containment process, and finds that it has a significant impact on the condensation heat transfer process, especially at the top of the heat exchanger. Therefore, in the design and optimization of PCCS, improving the heat transfer capacity at the bottom should be prioritized.
PROGRESS IN NUCLEAR ENERGY
(2022)
Article
Materials Science, Ceramics
Jacopo Barberi, Luisa Mandrile, Andrea M. Giovannozzi, Marta Miola, Lucia Napione, Andrea M. Rossi, Alessandra Vitale, Seiji Yamaguchi, Silvia Spriano
Summary: This paper reports the effect of silver doping on the interaction between a silica-based bioactive glass and albumin and fibronectin. The presence of silver significantly increases the adsorption of albumin and fibronectin and leads to a higher loss of secondary structure. It is also observed that proteins are embedded inside the surface reaction layer during adsorption due to the formation of a hydrated silica gel layer.
CERAMICS INTERNATIONAL
(2023)
Article
Mechanics
C. R. Constante-Amores, T. Abadie, L. Kahouadji, S. Shin, J. Chergui, D. Juric, A. A. Castrejon-Pita, O. K. Matar
Summary: This study investigates the effect of insoluble surfactants on the spatio-temporal evolution of turbulent jets through three-dimensional numerical simulations. The results show that surfactant-induced Marangoni stresses play a crucial role in the formation of coherent vortex structures and greatly influence the development of three-dimensional interfacial dynamics. The study also provides theoretical expressions for the mechanisms influencing the circulation production rate in the presence of surfactants.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mathematics, Applied
Sibo Cheng, Jianhua Chen, Charitos Anastasiou, Panagiota Angeli, Omar K. K. Matar, Yi-Ke Guo, Christopher C. C. Pain, Rossella Arcucci
Summary: In this paper, a system is proposed that combines reduced-order surrogate models with a novel data assimilation technique to incorporate real-time observations from different physical spaces into high-dimensional dynamical systems. The system uses local smooth surrogate functions to link the encoded system variables and the current observations, enabling variational data assimilation at low computational cost. The proposed approach improves the efficiency provided by reduced-order modeling and the accuracy of data assimilation.
JOURNAL OF SCIENTIFIC COMPUTING
(2023)
Article
Engineering, Biomedical
A. C. Moore, M. G. Hennessy, L. P. Nogueira, S. J. Franks, M. Taffetani, H. Seong, Y. K. Kang, W. S. Tan, G. Miklosic, R. El Laham, K. Zhou, L. Zharova, J. R. King, B. Wagner, H. J. Haugen, A. Munch, M. M. Stevens
Summary: This paper reports on the development of an engineered poroelastic material that begins to approach physiological performance. The material achieved a mean peak fluid load fraction of 68%, displayed consistency with mixture theory, and demonstrated cytocompatibility. This work creates a foundation for designing poroelastic cartilage implants and developing scaffold systems to study chondrocyte mechanobiology and tissue engineering.
ACTA BIOMATERIALIA
(2023)
Article
Chemistry, Physical
Virginia Alessandra Gobbo, Mari Lallukka, Francesca Gamna, Mirko Prato, Alessandra Vitale, Sara Ferraris, Ziba Najmi, Andrea Cochis, Lia Rimondini, Jonathan Massera, Silvia Spriano
Summary: This research focuses on developing a protocol to attach nisin, an antimicrobial peptide, to a nanotextured titanium alloy surface. The coated surface shows high surface energy, suitable for tissue integration, and releases nisin over a period longer than 1 day. The antibacterial properties were confirmed by reduced metabolic activity and viable adhered colonies of Staphylococcus aureus. This study demonstrates the potential of using chemically treated titanium surfaces coupled with nisin for bioactive and antibacterial tissue integration.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Juan Pablo Valdes, Lyes Kahouadji, Fuyue Liang, Seungwon Shin, Jalel Chergui, Damir Juric, Omar K. Matar
Summary: The internal dynamics of static mixers handling liquid-liquid flows have been comprehensively explored over the past decade. The effect of the inlet configuration and its relationship with the performance of the mixer in terms of droplet size distribution has been investigated. The study provides new insight into droplet deformation and breakage in SMX mixers for industrially-relevant scenarios using three-dimensional numerical simulations.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Mathematics, Applied
Matthew G. G. Hennessy, Richard V. V. Craster, Omar K. K. Matar
Summary: Understanding the generation of mechanical stress in drying, particle-laden films is important for industrial processes. The cantilever experiment, using simplified mathematical models, accurately predicts the film stress and plate deflection. The models account for non-uniform thickness and stress, as well as gradients in traction on the plate surface. The models are in excellent agreement with finite element solutions and can explain the time evolution of plate deflection observed in experiments.
EUROPEAN JOURNAL OF APPLIED MATHEMATICS
(2023)
Article
Chemistry, Physical
Julian Fischer, Lionel Porcar, Joao T. Cabral, Thomas Sottmann
Summary: The application of shear flow to bicontinuous microemulsions is expected to induce a transition to lamellae by suppressing surfactant monolayer fluctuations. This transition is likely to occur at much higher shear rates compared to the sponge phase. Using microfluidics and small-angle neutron scattering (SANS), the flow response of a model bicontinuous microemulsion was examined, and the spatial mapping of structural and orientation changes within the microchannel was achieved. With increasing flow rate, an increase in scattering anisotropy and a decrease in microemulsion domain size along the main flow orientation were observed. The bicontinuous-to-lamellar transition can be attributed to the gradual disappearance of inter-lamellar passages.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Annabelle Tan, Zain Ahmad, Pete Vukusic, Joao T. Cabral
Summary: We investigate the combined effects of surface diffraction and total internal reflection in the design of 3-dimensional materials exhibiting distinct structural colour on various facets. We propose a simple model that can account for all experimental observations. Using polydimethylsiloxane (PDMS), we demonstrate that multifaceted colours can respond to their environment. By coupling a right angle triangular prism with a surface grating, we demonstrate the straightforward fabrication of a GRISM. Finally, we outline possibilities for predictive material design using multi-axial wrinkling patterns and more complex polyhedra.
Article
Polymer Science
Daniele Bugnotti, Sara Dalle Vacche, Leandro Hernan Esposito, Emanuela Callone, Sara Fernanda Orsini, Riccardo Ceccato, Massimiliano D'Arienzo, Roberta Bongiovanni, Sandra Dire, Alessandra Vitale
Summary: The effect of processing method and sepiolite filler amount on the microstructure of starch-based nanocomposites was investigated. The processing method disrupted the rigid lattice structure of semicrystalline starch, resulting in amorphous flexible films with high transparency and good thermal resistance. The microstructure of the bio-nanocomposites depended on complex interactions among sepiolite, glycerol, and starch chains, which also affected the final properties of the composite materials.
Article
Computer Science, Interdisciplinary Applications
Tom Savage, Nausheen Basha, Jonathan Mcdonough, Omar K. Matar, Ehecatl Antonio del Rio Chanona
Summary: This article presents a framework to solve the nonlinear, computationally expensive, and derivative-free problem of optimizing complex reactor geometries. The framework uses Gaussian processes to learn a multi-fidelity model of reactor simulations and explores the search space of reactor geometries through lower fidelity simulations.
COMPUTERS & CHEMICAL ENGINEERING
(2023)
Article
Mathematics, Applied
Matthew G. Hennessy, Giulia L. Celora, Sarah L. Waters, Andreas Munch, Barbara Wagner
Summary: Mathematical models of polyelectrolyte gels often assume the gel is electrically neutral, based on the rationale that the electric double layer at the gel's surface is thin compared to the gel's size. This paper aims to study the structure of the electric double layer and establish the validity of the thin-EDL limit. The results show that the thin-EDL limit and electroneutrality assumption generally apply when the Debye length is much smaller than the Kuhn length.
EUROPEAN JOURNAL OF APPLIED MATHEMATICS
(2023)
Article
Materials Science, Characterization & Testing
Jerome M. Capannelli, Sara Dalle Vacche, Alessandra Vitale, Khaoula Bouzidi, Davide Beneventi, Roberta Bongiovanni
Summary: In this study, a vitrimeric material based on epoxy-functionalised cardanol cured with a biobased polycarboxylic acid was prepared. The material showed reprocessability without significant change in properties after a second curing cycle. It was then used in combination with cellulose powder to prepare a sustainable and biobased composite, suitable for 3D printing.
Article
Polymer Science
Jin Hau Lew, Omar K. Matar, Erich A. Mueller, Paul F. Luckham, Adrielle Sousa Santos, Maung Maung Myo Thant
Summary: In this study, the interaction between hydrolysed polyacrylamide (HPAM) with different molecular weights and calcium carbonate (CaCO3) was investigated using atomic force microscopy (AFM). The results showed that the presence of polymers, salt concentration, and molecular weight have significant effects on the interaction.
Article
Chemistry, Physical
Gunjan Tyagi, Zain Ahmad, Luca Pellegrino, Luis M. G. Torquato, Eric S. J. Robles, Joao T. Cabral
Summary: We studied the effect of substrate surface energy on the removal of triacylglycerol (TAG) films using a model surfactant solution under laminar flow conditions. Our experimental data showed that the removal time of TAG films is dependent on surface energy, particularly the polar component ySFEP. TAG films on highly hydrophilic surfaces with high ySFEP (>20 mJ/m2) delaminate rapidly, while those on lower ySFEP surfaces are eroded gradually over longer timescales. We found an approximately inverse linear relationship between ySFEP and removal time z, which is applicable to a wide range of surfaces and surface treatments.
SURFACES AND INTERFACES
(2023)