Article
Engineering, Multidisciplinary
Fredrik Lundstrom, Kenneth Frogner, Mats Andersson
Summary: This study investigates the impact of temperature dependence of thermal and electrical properties on induction heating of CFRP and presents a numerical model for computing temperature distribution. Experimental results show the importance of using temperature-dependent thermal properties in the numerical model.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Composites
Riccardo Cappello, Giuseppe Pitarresi, Giuseppe Catalanotti
Summary: A Finite Element model is developed to simulate the thermoelastic effect in orthotropic composite laminates subject to cyclic loading. A meso-scale approach is used to model the thermoelastic effect at the lamina level and through-thickness heat transfer. The model accurately captures the dependence of the thermoelastic response on factors such as loading frequency, presence of a resin-rich layer, material system, and layup. Results show that a steady state response is achieved quickly and adiabatic conditions are not fully met even at high loading frequencies. The presence of a resin-rich layer significantly affects through-the-thickness heat transfer and the measured thermoelastic signal.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Automation & Control Systems
Wen Peng, Xiaorui Chen, Li Zhang, Xudong Li, Jie Sun, Dianhua Zhang
Summary: The study focuses on the transverse temperature uniformity during endless strip production rolling using transverse flux induction heating. A coupled electromagnetic-thermal finite element model is established to investigate the influence of magnetic screens on temperature uniformity. The results show that an optimized combination of magnetic shielding amounts can enhance temperature uniformity in the process.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Alberto Pascual, Jesus Acero, Claudio Carretero, Sergio Llorente, Jose M. M. Burdio
Summary: The performance of induction cooktops is influenced by the inductive properties of the cookware used. Traditionally designed for fully ferromagnetic cookware, they now need to also work effectively with multimaterial cookware. This study presents an equivalent model for multimaterial loads, allowing for efficient evaluation of the cooktop's performance and accurate determination of equivalent parameters.
Article
Engineering, Chemical
Xuewei Han, Ying Liu, Fideline Tchuenbou-Magaia, Zhiguo Li, Mehdi Khojastehpour, Bangxin Li
Summary: This study used numerical simulation to investigate the collision damage of sweet cherry during post-harvest handling. A collision testbed was developed to validate the prediction accuracy of the fruit model. The study found that the internal damage degree of sweet cherry can be quantitatively assessed using three independent variables.
JOURNAL OF FOOD ENGINEERING
(2022)
Article
Mathematics
Jose Manuel Diaz Moreno, Concepcion Garcia Vazquez, Maria Teresa Gonzalez Montesinos, Francisco Ortegon Gallego, Giuseppe Viglialoro
Summary: This paper discusses a mathematical model for the industrial heating and cooling processes of a steel workpiece corresponding to the steering rack of an automobile. The study shows that the necessary hardness can be achieved in critical parts of the workpiece through rapid cooling, and describes the steel phase transformation during the hardening process.
Article
Acoustics
Xi Zhang, Hongguang Li, Xie Zhao, Chunyue Liu, Qu Liu, Hanlin Xiong, Guang Meng
Summary: This study adopts the acoustic finite element method (FEM) and acoustic boundary element method (BEM) coupling method to model, calculate, and analyze the three-dimensional model of a segmented ring transducer, in order to overcome the shortcomings of traditional FEM and direct coupling methods. The results indicate that the proposed method is correct and effective, and can be used to comprehensively calculate the acoustic characteristics of the segmented ring transducer.
Article
Engineering, Multidisciplinary
Fredrik Lundstrom, Kenneth Frogner, Mats Andersson
Summary: This study demonstrates how to simulate the temperature distribution during induction heating of woven fabric-based CFRP using a finite element model, with good agreement between the simulated and measured temperature distributions for plates with different fiber volume fractions.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Construction & Building Technology
Deju Zhu, Sai Liu, Md Zillur Rahman, Shuaicheng Guo, Zhaohui (Joey) Yang
Summary: A new design for a floor electrical heating system using commercially available carbon fiber tape as the heating source embedded in cement mortar was proposed. Experimental and numerical analysis showed stable heating performance and high heating flux. Optimization of the system effectively reduced energy consumption and improved heating efficiency.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Sandra Pozzer, Francisco Dalla Rosa, Zacarias Martin Chamberlain Pravia, Ehsan Rezazadeh Azar, Xavier Maldague
Summary: This study used numerical simulations to determine the favorable periods for IRT inspections, particularly for concrete structural health monitoring. The results showed that spring and summer are the most suitable periods for IRT inspections.
APPLIED SCIENCES-BASEL
(2021)
Article
Polymer Science
Zhijian Pei, Zhihui Deng, Xinmin Shi, Hui Zhao
Summary: The electromagnetic induction heating technology enables rapid temperature curing of carbon fiber reinforced polymer (CFRP) due to its fast heating speed and cleanness. In this study, a finite element model of induction heating CFRP was established to analyze the temperature field distribution and heating mechanism. Experiments verified the correctness of the model and conclusions. Furthermore, the influence of current, diameter, frequency, and distance on the heating rate was analyzed, with frequency found to have the greatest impact. The mathematical relationship between temperature field uniformity and entropy value was established, providing a quantitative analysis method for the temperature field uniformity of induction heating CFRP. Optimization analysis determined that a coil size between 65 mm and 95 mm and a spacing between 3.5 mm and 6.5 mm resulted in the best temperature field uniformity for the mentioned CFRP.
HIGH PERFORMANCE POLYMERS
(2023)
Article
Engineering, Chemical
Amin Shadi, Adel Ahmadihosseini, Mahdi Rabiei, Parham Samea, Ferri Hassani, Agus P. Sasmito, Seyed Ali Ghoreishi-Madiseh
Summary: This paper investigates the electromagnetic and thermal effects of microwave treatment of rocks and develops a numerical simulation tool based on the finite element method to simulate the microwave-treatment process. The simulation results are validated with experimental investigations and show the effectiveness of microwave pre-treatment technique in rock fragmentation.
MINERALS ENGINEERING
(2022)
Article
Materials Science, Characterization & Testing
Xiaoli Li, Ning Tao, Lichun Feng, J. G. Sun
Summary: This article presents a thickness prediction method using transmission step-heating thermography with a halogen lamp as the heating source. The method's high accuracy and wide applicability are demonstrated through experimental validation.
NDT & E INTERNATIONAL
(2022)
Article
Engineering, Manufacturing
A. Kishore Prasad, S. Kapil, S. Bag
Summary: This study presents a novel energy source, induction heating, for melting metallic wires in green manufacturing processes. Through mathematical and experimental approaches, the critical parameters for wire melting in an induction heating system are identified. The analytical and coupled electromagnetic-thermal models provide insights into the melting behavior and the key factors influencing the melting duration. The experimental system and the finite element model show satisfactory results when compared.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Geological
Martina Pressacco, Jari J. J. Kangas, Timo Saksala
Summary: This study numerically evaluates the effects of microwave heating on the mechanical properties of hard rock, showing that microwave heating can significantly reduce the compressive and tensile strength of the rock.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Shaurya Sachdev, Tjasa Potocnik, Lea Rems, Damijan Miklavcic
Summary: Gene therapies have revolutionized medicine by curing previously incurable diseases. With the ongoing COVID-19 pandemic, gene-based vaccines are being developed and distributed at record speeds. Gene electrotransfer (GET) is a non-viral technique that uses pulsed electric fields to overcome barriers and is currently being evaluated for therapeutic benefits in various indications. This review summarizes the current understanding of GET and discusses the mechanisms by which electric fields aid in overcoming barriers.
BIOELECTROCHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Peter Kramar, Damijan Miklavcic
Summary: The study aimed to investigate the effects of different cholesterol concentrations on the behavior of planar lipid bilayers under an electric field. The results showed no statistical difference in capacitance but a significant impact on breakdown voltage with the addition of cholesterol.
BIOELECTROCHEMISTRY
(2022)
Article
Engineering, Biomedical
Vitalij Novickij, Austeja Baleviciute, Veronika Malysko, Augustinas Zelvys, Eivina Radzeviciute, Bor Kos, Aukse Zinkeviciene, Damijan Miklavcic, Jurij Novickij, Irute Girkontaite
Summary: This study focuses on the use of high repetition frequency unipolar nanosecond pulses for bleomycin electrochemotherapy. It was found that the efficacy of sub-microsecond electrochemotherapy can be manipulated solely by the time delay between pulses.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Helena Cindric, Gorana Gasljevic, Ibrahim Edhemovic, Erik Brecelj, Jan Zmuc, Maja Cemazar, Alenka Seliskar, Damijan Miklavcic, Bor Kos
Summary: This study investigated electroporation in the liver using a numerical mesoscale tissue model. The results showed that liver microstructure does not significantly affect the electric field distribution, but major hepatic vessels and portal spaces do have a significant impact, which should be considered in treatment planning.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Aleksandra Cvetkoska, Alenka Macek-Lebar, Peter Trdina, Damijan Miklavcic, Matej Rebersek
Summary: This study is the first to examine pain sensation in humans using biphasic high-frequency electroporation pulses. The results confirm that biphasic high-frequency pulses with a pulse width of 1 or 2 microseconds reduce muscle contraction and pain sensation compared to longer monophasic pulses. Additionally, the interphase and interpulse delays play a significant role in reducing muscle contraction and/or pain sensation. These findings are important for optimizing the pulse parameters of electroporation treatments.
SCIENTIFIC REPORTS
(2022)
Article
Oncology
Helena Cindric, Damijan Miklavcic, Francois H. Cornelis, Bor Kos
Summary: Electroporation has sparked great interest in medical applications. This study presents an algorithm that optimizes electrode positions based on spatial information of the electric field distribution in the target tissue. The algorithm successfully applies to different spinal segments, tumor sizes, and locations within the vertebra. It significantly reduces the time and expertise required for treatment planning of vertebral tumors.
Article
Pharmacology & Pharmacy
Aleksandra Cvetkoska, Janja Dermol-Cerne, Damijan Miklavcic, Simona Kranjc Brezar, Bostjan Markelc, Gregor Sersa, Matej Rebersek
Summary: In this study, a new pulse generator, applicator, and pulse delivery protocol for gene electrotransfer (GET) to skin cells were developed. The results showed that the proposed pulse delivery protocol resulted in higher gene expression in mouse skin cells compared to the currently used pulse generator, applicator, and pulse delivery protocol.
Article
Engineering, Biomedical
Rok Smerc, David A. A. Ramirez, Samo Mahnic-Kalamiza, Janja Dermol-Cerne, Daniel C. C. Sigg, Lars M. M. Mattison, Paul A. A. Iaizzo, Damijan Miklavcic
Summary: The aim of this study was to investigate the influence of electric field orientation in anisotropic muscle tissue on irreversible electroporation damage. In vivo experiments were conducted on porcine skeletal muscle, with the electric field applied parallel or perpendicular to the muscle fibers. Results showed that lesions in the parallel group were consistently smaller and narrower than those in the perpendicular group. The study concludes that muscle anisotropy is a significant factor in determining electric field distribution in electroporation applications. Significance: 8/10
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2023)
Article
Cardiac & Cardiovascular Systems
Lars Mattison, Atul Verma, Khaldoun G. Tarakji, Tobias Reichlin, Gerhard Hindricks, Kevin L. Sack, Birce Onal, Megan M. Schmidt, Damijan Miklavcic, Daniel C. Sigg
Summary: In this study, it was found that contact force in pulsed field ablation (PFA) had minimal effects on lesion dimensions, with only a small increase in depth, width, and volume of the lesions. The importance lies in achieving tissue contact rather than the force applied.
JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY
(2023)
Review
Pharmacology & Pharmacy
Tjasa Potocnik, Alenka Macek Lebar, Spela Kos, Matej Rebersek, Eva Pirc, Gregor Sersa, Damijan Miklavcic
Summary: The mechanisms and optimization strategies of nucleic acid delivery with gene electrotransfer (GET) are still not well understood. This article reviews the current state of knowledge through a systematic literature review and meta-analysis of in vitro GET studies, emphasizing the importance of parameter selection and result evaluation.
Article
Chemistry, Applied
Jessica Genovese, Marko Strucic, Igor Sersa, Vitalij Novickij, Pietro Rocculi, Damijan Miklavcic, Samo Mahnic-Kalamiza, Matej Kranjc
Summary: Using magnetic resonance imaging and magnetic resonance electrical impedance tomography, we investigated the non-uniform effect of pulsed electric field (PEF) treatment on plant tissues such as apple, potato, and carrot. The results showed that the distribution of T2 relaxation times became increasingly inhomogeneous as the complexity of the tissue structure increased. The feasibility and potential of using the T2 mapping technique to analyze the effects of PEF on plant tissue structures were demonstrated.
Article
Biochemistry & Molecular Biology
Matej Kranjc, Tamara Polajzer, Vitalij Novickij, Damijan Miklavcic
Summary: High-Intensity Pulsed Electromagnetic Fields (HI-PEMF) treatment, a noninvasive technique, has shown potential for transferring genetic materials and activating immune response through remote induction of electric field. This study investigates the release of DAMP molecules after HI-PEMF treatment and suggests minimal activation of immune response.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Oncology
Angelika Vizintin, Stefan Markovic, Janez Scancar, Jerneja Kladnik, Iztok Turel, Damijan Miklavcic
Summary: The study found that equivalent nanosecond pulses are equally effective in electrochemotherapy as standardly used 8 x 100 mu s pulses. The number of intracellular cisplatin molecules strongly correlates with cell survival for B16F1 cells, but less for CHO cells, implying the possible involvement of other mechanisms in electrochemotherapy. High-voltage electric pulses do not alter the structure of cisplatin.
RADIOLOGY AND ONCOLOGY
(2022)
Meeting Abstract
Biophysics
Katja Balantic, Damijan Miklavcic, Peter Kramar
BIOPHYSICAL JOURNAL
(2022)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
