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Thematische Bibliographien / Multiphysics properties / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Multiphysics properties“

Autor: Grafiati

Veröffentlicht am 18. Mai 2024

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1

Zaporozhets, Yu, A. Ivanov, Yu Kondratenko, V. Tsurkin, and N. Batechko. "Innovative System of Computer Modelling of Multiphysics Processes for Controlled Electrocurrent Treatment of Melts." Science and Innovation 18, no. 4 (2022): 85–105. http://dx.doi.org/10.15407/scine18.04.085.

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Introduction. The widespread use of cast products made of aluminum and its alloys requires ensuring a highquality structure of the castings, on which their operational properties depend. Controlling the process of forming a high-quality structure of castings is possible, in particular, by the method of electrocurrent treatment of melts.Problem Statement. The melt medium being inaccessible for direct measurement of the processing parameters, the only way to realize the control of treatment conditions is numerical simulation of these parameters. However, the complexity and interdependence of mul

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Lin, Yihao, Yang Qin, Bilin Gong, et al. "Analysis of the Parallel Seam Welding Process by Developing a Directly Coupled Multiphysics Simulation Model." Processes 12, no. 1 (2023): 78. http://dx.doi.org/10.3390/pr12010078.

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Parallel seam welding (PSW) is the most commonly employed encapsulation technology to ensure hermetic sealing and to safeguard sensitive electronic components. However, the PSW process is complicated by the presence of multiphysical phenomena and nonlinear contact problems, making the analysis of the dynamics of the PSW process highly challenging. This paper proposes a multiphysics simulation model based on direct coupling, enabling the concurrent coupling of the electric field, temperature field, and structural field to facilitate the analysis of the thermal and electrical dynamics within the

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Zhao, Xiaoyu, Guannan Wang, Qiang Chen, Libin Duan, and Wenqiong Tu. "An effective thermal conductivity and thermomechanical homogenization scheme for a multiscale Nb3Sn filaments." Nanotechnology Reviews 10, no. 1 (2021): 187–200. http://dx.doi.org/10.1515/ntrev-2021-0015.

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Abstract A comprehensive study of the multiscale homogenized thermal conductivities and thermomechanical properties is conducted towards the filament groups of European Advanced Superconductors (EAS) strand via the recently proposed Multiphysics Locally Exact Homogenization Theory (LEHT). The filament groups have a distinctive two-level hierarchical microstructure with a repeating pattern perpendicular to the axial direction of Nb3Sn filament. The Nb3Sn filaments are processed in a very high temperature between 600 and 700°C, while its operation temperature is extremely low, −269°C. Meanwhile,

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Giurgea, S., T. Chevalier, J. L. Coulomb, and Y. Marchal. "Unified physical properties description in a multiphysics open platform." IEEE Transactions on Magnetics 39, no. 3 (2003): 1642–45. http://dx.doi.org/10.1109/tmag.2003.810182.

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5

Bukshtynov, Vladislav, and Bartosz Protas. "Optimal reconstruction of material properties in complex multiphysics phenomena." Journal of Computational Physics 242 (June 2013): 889–914. http://dx.doi.org/10.1016/j.jcp.2013.02.034.

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Mohammed Ali, Ali K. "CdSe and CdTe Mechanical Properties Revealed by COMSOL Multiphasics." Al-Mustansiriyah Journal of Science 34, no. 4 (2023): 104–9. http://dx.doi.org/10.23851/mjs.v34i4.1355.

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Two Metal chalcogenide compounds CdTe and CdSe have been studied in depth because they are used in many optoelectronic and electronic devices. High pressure causes structural phase transitions in semiconductor materials, which have been the subject of much research. CdTe is a direct band-gap IIeVI semiconductor. Cadmium-tellurium crystalline compound has been used in more and more industries. High dislocation density is one of the problems with bulk-grown CdTe. Comsol Multiphysics was used to evaluate mechanical stress on a material. COMSOL Multiphysics 5.5 allows you to access a database of p

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Sanfilippo, Danilo, Bahman Ghiassi, Alessio Alexiadis, and Alvaro Garcia Hernandez. "Combined Peridynamics and Discrete Multiphysics to Study the Effects of Air Voids and Freeze-Thaw on the Mechanical Properties of Asphalt." Materials 14, no. 7 (2021): 1579. http://dx.doi.org/10.3390/ma14071579.

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This paper demonstrates the use of peridynamics and discrete multiphysics to assess micro crack formation and propagation in asphalt at low temperatures and under freezing conditions. Three scenarios are investigated: (a) asphalt without air voids under compressive load, (b) asphalt with air voids and (c) voids filled with freezing water. The first two are computed with Peridynamics, the third with peridynamics combined with discrete multiphysics. The results show that the presence of voids changes the way cracks propagate in the material. In asphalt without voids, cracks tend to propagate at

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Belov, A. V., O. V. Kopchenov, A. O. Skachkov, and D. E. Ushakov. "Solid-state explosion simulation in COMSOL Multiphysics." Multiphase Systems 14, no. 4 (2019): 253–61. http://dx.doi.org/10.21662/mfs2019.4.032.

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In this work, the propagation of blast waves in a rock mass caused by a short-term load is considered. Such loads are typical in the construction of tunnels and other excavations using blasting. For modeling by the finite element method, the cross-platform software COMSOL Multiphysics 5.4 was used. The explosion is reproduced in a steel tank whose steel grade is EN 1.7220 4CrMo4. The medium in the tank has the properties of granite rock (Young’s modulus E = 50 GPa, Poisson’s ratio ν = 2/7, Density ρ = 2700 kg/m3 ). The sphere is also a body having the properties of granite. Set to clarify the

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Qu, Danqi, and Hui-Chia Yu. "Multiphysics Electrochemical Impedance Simulations of Complex Multiphase Electrodes." ECS Meeting Abstracts MA2023-02, no. 54 (2023): 2548. http://dx.doi.org/10.1149/ma2023-02542548mtgabs.

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Electrochemical impedance spectroscopy (EIS) is a widely used technique for characterizing materials in electrochemical systems. However, directly connecting the obtained quantities to microstructure-level phenomena is challenging. In this work, we performed detailed electrochemical microstructure simulations to investigate the EIS behavior of phase-separating graphite electrodes. We employed the Cahn-Hilliard phase-field equation to model Li transport and phase transitions in the graphite particles. In single-phase graphite particles, the charge-transfer resistance reflected the total active

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Nilboworn, Salakjit, Phairote Wounchoum, Warit Wichakool, and Wiriya Thongruang. "Electrical Properties Characterization and Numerical Models of Rubber Composite at High Frequency." Advanced Materials Research 844 (November 2013): 429–32. http://dx.doi.org/10.4028/www.scientific.net/amr.844.429.

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This paper presents a numerical model of rubber composite using a COMSOL multiphysics program to simulate electrical properties of the rubber composite in the frequency range of 300 kHz to 30 MHz. The rubber composite was made of natural rubber vulcanized with carbon black and carbon nanotube. The chracterization was done by setting up a parallel plate capacitive structure in a shape of circular disk with a diameter of 38 mm and using the RF vector network analyzer to measure electrical properties in term of electrical impedance, specifically resistance (R) and reactance (X). Three different t

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Neubauer, Justin, and Kwang J. Kim. "Multiphysics Modeling Framework for Soft PVC Gel Sensors with Experimental Comparisons." Polymers 15, no. 4 (2023): 864. http://dx.doi.org/10.3390/polym15040864.

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Polyvinyl chloride (PVC) gels have recently been found to exhibit mechanoelectrical transduction or sensing capabilities under compressive loading applications. This phenomenon is not wholly understood but has been characterized as an adsorption-like phenomena under varying amounts and types of plasticizers. A different polymer lattice structure has also been tested, thermoplastic polyurethane, which showed similar sensing characteristics. This study examines mechanical and electrical properties of these gel sensors and proposes a mathematical framework of the underlying mechanisms of mechanoe

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Sengupta, Madhumita, Mark G. Kittridge, and Jean-Pierre Blangy. "Using digital rocks and simulations of pore-scale multiphysics to characterize a sandstone reservoir." Interpretation 5, no. 1 (2017): SB33—SB43. http://dx.doi.org/10.1190/int-2016-0068.1.

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The modeling and prediction of transport and elastic properties for sandstones are critical steps in the exploration and appraisal of hydrocarbon reservoirs, particularly in deepwater settings where seismic data are abundant and well costs are high. Reliable multiphysics modeling of reservoir rocks requires robust models that respect the underlying geologic character and microstructure of the geomaterial and honor the measured properties. We have developed a case study that integrates traditional laboratory measurements with computational methods to quantify and relate physical properties of r

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Bierwisch, C., A. Butz, B. Dietemann, A. Wessel, T. Najuch, and S. Mohseni-Mofidi. "PBF-LB/M multiphysics process simulation from powder to mechanical properties." Procedia CIRP 111 (2022): 37–40. http://dx.doi.org/10.1016/j.procir.2022.08.111.

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Ariffin, Shahrul A. B., U. Hashim, and Tijjani Adam. "Designing Microchannels Separator Mask for Lithography Process." Advanced Materials Research 795 (September 2013): 563–67. http://dx.doi.org/10.4028/www.scientific.net/amr.795.563.

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Recently microfluidic has drawn attention from fellow research because of their unique properties and behavior in biotechnology, biomedical, micro and nanotechnology. Microfluidic is a combination from several components that consists from Microhannel, micromixer, microchamber, concentrator, separation and valve but component of microfluidic will be conduct in simulation is microfluidic separation and microchannel. This paper will elaborate more about design of microchannel separator by using COMSOL Multiphysics 3.5 software and base on the result from the COMSOL Multiphysics 3.5, we can creat

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Jamolov, Umid, Francesco Peccini, and Giovanni Maizza. "Multiphysics Design of an Automotive Regenerative Eddy Current Damper." Energies 15, no. 14 (2022): 5044. http://dx.doi.org/10.3390/en15145044.

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This research presents a finite element multi-physics design methodology that can be used to develop and optimise the inherent functions and geometry of an innovative regenerative eddy current (REC) damper for the suspension of B class vehicles. This methodology was inspired by a previous work which has been applied successfully for the development of an eddy current (EC) damper used for the same type of applications. It is based on a multifield finite element coupled model that can be used to fulfil the electromagnetic, thermal, and fluid dynamic field properties and boundary conditions of a

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Yang, Jikun, Zhanmiao Li, Xudong Xin, et al. "Designing electromechanical metamaterial with full nonzero piezoelectric coefficients." Science Advances 5, no. 11 (2019): eaax1782. http://dx.doi.org/10.1126/sciadv.aax1782.

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Designing topological and geometrical structures with extended unnatural parameters (negative, near-zero, ultrahigh, or tunable) and counterintuitive properties is a big challenge in the field of metamaterials, especially for relatively unexplored materials with multiphysics coupling effects. For natural piezoelectric ceramics, only five nonzero elements in the piezoelectric matrix exist, which has impeded the design and application of piezoelectric devices for decades. Here, we introduce a methodology, inspired by quasi-symmetry breaking, realizing artificial anisotropy by metamaterial design

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Zinelabiddine, Mezache, Fatiha Benabdelaziz, Samir Seghaouil, and Walid Chaibi. "A comparative study of 2d nanostructureds chiral photonic crystal connected and disconnected in terahertz (THZ) re-gime." International Journal of Physical Research 6, no. 1 (2018): 31. http://dx.doi.org/10.14419/ijpr.v6i1.9260.

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The 2D nanostructureds Chiral Photonic Crystal (CPC) connected and disconnected in terahertz (THz) regime, on silicon oxide SiO2 substrates, are comparatively studied via Comsol Multiphysics 5.0. Where properties of this nanostructureds are discussed based on transmission coefficient (S21) and reflection coefficient (S11).

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Garmendia, Iñaki, Haritz Vallejo, and Usue Osés. "Composite Mould Design with Multiphysics FEM Computations Guidance." Computation 11, no. 2 (2023): 41. http://dx.doi.org/10.3390/computation11020041.

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Composite moulds constitute an attractive alternative to classical metallic moulds when used for components fabricated by processes such as Resin Transfer Moulding (RTM). However, there are many factors that have to be accounted for if a correct design of the moulds is sought after. In this paper, the Finite Element Method (FEM) is used to help in the design of the mould. To do so, a thermo-electrical simulation has been performed through MSC-Marc in the preheating phase in order to ensure that the mould is able to be heated, through the Joule’s effect, according to the thermal cycle specified

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Rabbani, Arash, Brittany Wojciechowski, and Bhisham Sharma. "Imaging based pore network modeling of acoustical materials." Journal of the Acoustical Society of America 153, no. 3_supplement (2023): A361. http://dx.doi.org/10.1121/10.0019165.

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The acoustical behavior of porous materials is dictated by their underlying pore network geometry. Given the complexity of accurately characterizing the various pore network features, current acoustical models instead rely on indirectly incorporating these features by accounting for them within acoustical transport properties, such as tortuosity, viscous and thermal characteristic lengths, and flow resistivity. In turn, these transport properties are currently identified using inverse characterization techniques or using multiphysics modeling techniques. Here, we propose the use of advanced im

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Mezghani, Fadhil, Dominique Barchiesi, Abel Cherouat, Thomas Grosges, and Houman Borouchaki. "Comparison of 3D Adaptive Remeshing Strategies for Finite Element Simulations of Electromagnetic Heating of Gold Nanoparticles." Advances in Mathematical Physics 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/469310.

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The optical properties of metallic nanoparticles are well known, but the study of their thermal behavior is in its infancy. However the local heating of surrounding medium, induced by illuminated nanostructures, opens the way to new sensors and devices. Consequently the accurate calculation of the electromagnetically induced heating of nanostructures is of interest. The proposed multiphysics problem cannot be directly solved with the classical refinement method of Comsol Multiphysics and a 3D adaptive remeshing process based on ana posteriorierror estimator is used. In this paper the efficienc

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Samon, Jean, Jemimah Ndomou, and Damasse Fotsa. "Analysis of coupling methods: a review." Al-Qadisiyah Journal for Engineering Sciences 15, no. 3 (2022): 192–201. http://dx.doi.org/10.30772/qjes.v15i3.835.

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The multiphysics field is a branch of physics whose objective is to couple at least two physical systems. Each is governed by its own principles of evolution or equilibrium such as balance laws or constitutive laws. Many engineering problems can only be described correctly by coupling fields of physics that have historically been developed and taught separately. These problems require on the one hand a good understanding of each physical domain, but above all an analysis of the coupling mechanisms of these physical domains, in order to propose a relevant model capable of solving the problem. A

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Andreenkov, Evgeniy S., Vaclav E. Skorubskiy, and Sergey A. Shunaev. "On the issue of modeling a high-voltage insulator in the COMSOL Multiphysics 5.6 soft package." Journal Of Applied Informatics 16, no. 95 (2021): 126–35. http://dx.doi.org/10.37791/2687-0649-2021-16-5-126-135.

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The article discusses the main aspects of modeling suspended polymer high-voltage insulation of overhead power lines (PTL) in the COMSOL Multiphysics 5.6 software package. Analytical expressions of the mathematical model of the electromagnetic field around the insulator are given, on the basis of which a numerical solution is formed within the software package that allows you to build a model of the electric field in two-dimensional and three-dimensional space. There are three main stages of working with the program interface. At the first stage, the task of the geometric dimensions of the mod

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Dai, Jing, Zhi Xiong Huang, Zhuo Chen, Rong Yang Dou, and Min Xian Shi. "Analysis of Active Vibration Control in Damping Cantilever Beam by ANSYS with Material Properties." Applied Mechanics and Materials 252 (December 2012): 102–6. http://dx.doi.org/10.4028/www.scientific.net/amm.252.102.

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It is possible to model transient dynamic analysis of different composite foam cantilever beams by ANSYS/Multiphysics. By the piezoelectric material's positive piezoelectric effect and negative piezoelectric effect, the active vibration control of damping cantilever beam has achieved through the APDL program. The analysis of the results indicates when the control ratio K kept constant, the vibration stop times and the material damping ratio were closely connected.

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Yu, Minghao, Zeyang Qiu, Bo Lv, and Yusuke Takahashi. "Multiphysics Mathematical Modeling and Flow Field Analysis of an Inflatable Membrane Aeroshell in Suborbital Reentry." Mathematics 10, no. 5 (2022): 832. http://dx.doi.org/10.3390/math10050832.

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In the present study, a multiphysics mathematical model for reproducing the flow field characteristics of an inflatable aeroshell was developed to study the aerodynamic properties of the flow around a membrane reentry vehicle. Firstly, the configuration and flight sequence of a membrane reentry vehicle used in the experiment were introduced. Secondly, mathematical equations of multiphysics fields, such as the Navier–Stokes equations, the heat conduction equation, and the membrane deformation equation, were introduced and numerically solved. The variation characteristics of the flow properties

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Ramadan, E. M., Ahmed E.Hussien, Amro M.Youssef, and Tarek M. Abd El-Badia. "Numerical Simulation of Wear in Aircraft Carbon-Carbon Composite Disk Brake." Journal of Engineering and Science Research 6, no. 6 (2022): 88–98. http://dx.doi.org/10.26666/rmp.jesr.2022.6.9.

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Friction and wear are two major factors affecting the disk brake service life. Carbon-carbon composite materials have good stable friction properties, which enable them to operate as friction material in aircraft brakes application. This article discusses a wear simulation method for predicting the wear amount of c/c composite aircraft brakes under simulated operating conditions. A modified version of Archard’s wear equation is used in 2-D axisymmetric finite element model in order to predict the disk brake friction surfaces wear progression. The finite element commercial software COMSOL Multi

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Alhammadi, Ayoob, Abdulmonem Fetyan, Rahmat Agung Susantyoko, and Musbaudeen O. Bamgbopa. "Understanding Characteristic Electrochemical Impedance Spectra of Redox Flow Batteries with Multiphysics Modelling." ECS Meeting Abstracts MA2023-01, no. 25 (2023): 1678. http://dx.doi.org/10.1149/ma2023-01251678mtgabs.

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Abstract Electrochemical impedance spectroscopy (EIS) is a non-destructive technique for analyzing electrochemical systems (such as redox flow batteries – RFBs). Battery researchers widely adopt equivalent circuit models (ECMs) to analyze EIS spectra of RFBs and attempt to use the circuit to deduce prevalent transport and kinetic properties [1]. Straightforward adoption of these ECMs suffers from some setbacks which need rectifying. There is a major issue of poor or inconsistent physical interpretation of the different circuit elements. ECMs of batteries are commonly used in real-time applicat

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Lomte, Amulya, and Bhisham Sharma. "Effect of geometrical defects on the acoustical transport properties of periodic porous absorbers manufactured using stereolithography." Noise Control Engineering Journal 71, no. 5 (2023): 365–71. http://dx.doi.org/10.3397/1/377129.

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Additive manufacturing allows the fabrication of acoustical materials with previously unrealizable micro- and macrostructural complexities. However, the still nascent understanding of various geometrical defects occurring during the additive process remains a barrier to accurately predicting the acoustical behavior of such complex absorbers. In this study, we present the results from our efforts on numerically modeling the absorption behavior of periodic porous absorbers fabricated using the stereolithography (SLA) technique using the hybrid micro-macro multiphysics approach. Specifically, we

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Lomte, Amulya, and Bhisham Sharma. "Effect of geometrical defects on the acoustical and transport properties of periodic porous absorbers manufactured using stereolithography." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 266, no. 2 (2023): 273–82. http://dx.doi.org/10.3397/nc_2023_0039.

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Additive manufacturing allows the fabrication of acoustical materials with previously unrealizable micro- and macrostructural complexities. However, the still nascent understanding of various geometrical defects occurring during the additive process remains a barrier to accurately predicting the acoustical behavior of such complex absorbers. In this study, we present the results from our efforts on numerically modeling the absorption behavior of periodic porous absorbers fabricated using the stereolithography (SLA) technique using the hybrid micro-macro multiphysics approach. Specifically, we

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Taylor Parkins, Shannara Kayleigh, Swathi Murthy, Cristian Picioreanu, and Michael Kühl. "Multiphysics modelling of photon, mass and heat transfer in coral microenvironments." Journal of The Royal Society Interface 18, no. 182 (2021): 20210532. http://dx.doi.org/10.1098/rsif.2021.0532.

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Coral reefs are constructed by calcifying coral animals that engage in a symbiosis with dinoflagellate microalgae harboured in their tissue. The symbiosis takes place in the presence of steep and dynamic gradients of light, temperature and chemical species that are affected by the structural and optical properties of the coral and their interaction with incident irradiance and water flow. Microenvironmental analyses have enabled quantification of such gradients and bulk coral tissue and skeleton optical properties, but the multi-layered nature of corals and its implications for the optical, th

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Stepanov, Sergei, Djulustan Nikiforov, and Aleksandr Grigorev. "Multiscale Multiphysics Modeling of the Infiltration Process in the Permafrost." Mathematics 9, no. 20 (2021): 2545. http://dx.doi.org/10.3390/math9202545.

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In this work, we design a multiscale simulation method based on the Generalized Multiscale Finite Element Method (GMsFEM) for numerical modeling of fluid seepage under permafrost condition in heterogeneous soils. The complex multiphysical model consists of the coupled Richards equation and the Stefan problem. These problems often contain heterogeneities due to variations of soil properties. For this reason, we design coarse-grid spaces for the multiphysical problem and design special algorithms for solving the overall problem. A numerical method has been tested on two- and three-dimensional mo

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Voznesensky, A. S., and L. K. Kidima-Mbombi. "Formation of synthetic structures and textures of rocks when simulating in COMSOL Multiphysics." Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 6, no. 2 (2021): 65–72. http://dx.doi.org/10.17073/2500-0632-2021-2-65-72.

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Rock texture and structure play an important role in the formation of the rock physical properties, and also carry information about their genesis. The paper deals with the simulation of geometric shapes of various structures and textures of rocks by the finite-element method (FEM). It is carried out by programmed detailing of the element properties and their spatial location in the simulated object. When programming structures, it is also possible to set the physical properties of various parts of the model, grids, initial and boundary conditions, which can be changed in accordance with the s

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Högblom, Olle, and Ronnie Andersson. "Multiphysics CFD Simulation for Design and Analysis of Thermoelectric Power Generation." Energies 13, no. 17 (2020): 4344. http://dx.doi.org/10.3390/en13174344.

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The multiphysics simulation methodology presented in this paper permits extension of computational fluid dynamics (CFD) simulations to account for electric power generation and its effect on the energy transport, the Seebeck voltage, the electrical currents in thermoelectric systems. The energy transport through Fourier, Peltier, Thomson and Joule mechanisms as a function of temperature and electrical current, and the electrical connection between thermoelectric modules, is modeled using subgrid CFD models which make the approach computational efficient and generic. This also provides a soluti

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Odette, G. R., B. D. Wirth, D. J. Bacon, and N. M. Ghoniem. "Multiscale-Multiphysics Modeling of Radiation-Damaged Materials: Embrittlement of Pressure-Vessel Steels." MRS Bulletin 26, no. 3 (2001): 176–81. http://dx.doi.org/10.1557/mrs2001.39.

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Radiation damage, and its attendant effect on a wide spectrum of materials properties, is a central issue in many advanced technologies ranging from ion-beam processing to the development of fusion power. Indeed, the various challenges presented by irradiation effects are too numerous to discuss in this brief article.

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Wang, Weijie, Yannan Liu, Zhenguo Zhao, and Haijing Zhou. "Parallel Multiphysics Simulation of Package Systems Using an Efficient Domain Decomposition Method." Electronics 10, no. 2 (2021): 158. http://dx.doi.org/10.3390/electronics10020158.

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With the continuing downscaling in feature sizes, the thermal impact on material properties and geometrical deformations can no longer be ignored in the analysis of the electromagnetic compatibility or electromagnetic interference of package systems, including System-in-Package and antenna arrays. We present a high-performance numerical simulation program that is intended to perform large-scale multiphysics simulations using the finite element method. An efficient domain decomposition method was developed to accelerate the multiphysics loops of electromagnetic–thermal stress simulations by con

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Lemaire, T., J. Kaiser, S. Naili, and V. Sansalone. "Three-Scale Multiphysics Modeling of Transport Phenomena within Cortical Bone." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/398970.

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Bone tissue can adapt its properties and geometry to its physical environment. This ability is a key point in the osteointegration of bone implants since it controls the tissue remodeling in the vicinity of the treated site. Since interstitial fluid and ionic transport taking place in the fluid compartments of bone plays a major role in the mechanotransduction of bone remodeling, this theoretical study presents a three-scale model of the multiphysical transport phenomena taking place within the vasculature porosity and the lacunocanalicular network of cortical bone. These two porosity levels e

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Pettersen, Fred-Johan, and Jan Olav Høgetveit. "From 3D tissue data to impedance using Simpleware ScanFE+IP and COMSOL Multiphysics – a tutorial." Journal of Electrical Bioimpedance 2, no. 1 (2019): 13–32. http://dx.doi.org/10.5617/jeb.173.

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Abstract Tools such as Simpleware ScanIP+FE and COMSOL Multiphysics allow us to gain a better understanding of bioimpedance measurements without actually doing the measurements. This tutorial will cover the steps needed to go from a 3D voxel data set to a model that can be used to simulate a transfer impedance measurement. Geometrical input data used in this tutorial are from MRI scan of a human thigh, which are converted to a mesh using Simpleware ScanIP+FE. The mesh is merged with electrical properties for the relevant tissues, and a simulation is done in COMSOL Multiphysics. Available numer

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Zhapbasbayev, U. K., and A. D. Kudaibergen. "Modeling of heat transfer in a fuel pellet based on uranium dioxide and ceramics (beryllium oxide)." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 318, no. 3 (2021): 81–89. http://dx.doi.org/10.31643/2021/6445.31.

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The results of heat transfer mathematical model calculations in the “UO2-BeO” pellet are presented. The fuel pellet consists of uranium dioxide (UO2) and beryllium oxide (BeO) ceramics. Modeling of heat transfer was carried out by a system of generalized heat conduction equations with variable thermophysical properties. The calculated data of the temperature field in the fuel pellet were obtained using the COMSOL Multiphysics software code. The results of temperature calculations were compared with the data of other authors. The agreement of the calculated data shows the mathematical model and

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Liu, Chenran, Ke Xu, Jian Feng, and Ming Fang. "Investigation of Giant Nonlinearity in a Plasmonic Metasurface with Epsilon-Near-Zero Film." Photonics 10, no. 5 (2023): 592. http://dx.doi.org/10.3390/photonics10050592.

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Plasmonic metamaterials can exhibit a variety of physical optical properties that offer extraordinary nonlinear conversion efficiency for ultra-compact nanodevice applications. Furthermore, the optical-rectification effect from the plasmonic nonlinear metasurfaces (NLMSs) can be used as a compact source of deep-subwavelength thickness to radiate broadband terahertz (THz) signals. Meanwhile, a novel dual-mode metasurface consisting of a split-ring resonator (SRR) array and an epsilon-near-zero (ENZ) layer was presented to boost the THz conversion efficiency further. In this paper, to explore th

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ISHIOKA, Tomohiro, Yoji SHIBUTANI, and Ryuichi TARUMI. "418 Electron Beam-induced Acoustic Wave Properties by Multiphysics Analyses of Thermo-electroelastic Field." Proceedings of Conference of Kansai Branch 2013.88 (2013): _4–18_. http://dx.doi.org/10.1299/jsmekansai.2013.88._4-18_.

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Liu, Rong, Wenzhong Zhou, Andrew Prudil, and Paul K. Chan. "Multiphysics modeling of UO2-SiC composite fuel performance with enhanced thermal and mechanical properties." Applied Thermal Engineering 107 (August 2016): 86–100. http://dx.doi.org/10.1016/j.applthermaleng.2016.06.173.

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Cumbunga, Judice, Said Abboudi, and Dominique Chamoret. "Numerical Modeling and Simulation of Microstructure Evolution during Solid-State Sintering: Multiphysics Approach." Key Engineering Materials 969 (December 12, 2023): 39–47. http://dx.doi.org/10.4028/p-idpi6f.

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A multiphysics numerical approach based on a coupling of heat conduction equation, mechanical field (effect of gravity), and phase-field equations is proposed as an alternative to predict the microstructure evolution of 316L stainless steel during the pressureless solid-state sintering process. In this context, a numerical model based on the finite element method has shown to be suitable for evaluating the impact of the thermal field, as the activation force of the sintering process, on the microstructure field evolution and, in turn, the impact of the evolution of phase field variables on the

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Schneider, Olga, Diego Gonzalez, and Arnd Ehrhardt. "Multiphysical Simulation of Impulse Current Arcs in Spark Gaps for Industrial Applications." PLASMA PHYSICS AND TECHNOLOGY 10, no. 3 (2023): 119–22. http://dx.doi.org/10.14311/ppt.2023.3.119.

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Digital prototyping enables cost-effective production and modular optimization of surge protection devices (SPD). Numerical model of SPD prototypes involves complex multiphysics phenomena. However, the processes related to impulse current arcs in spark gaps are not well understood so far. Limited knowledge exists regarding hydrodynamic effects, plasma states, and radiation properties. This work studies an impulse current 8/20 µs with an amplitude of about 5 kA in experiment and simulation.

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Hou, Guangfeng, Vianessa Ng, Yi Song, et al. "Numerical and Experimental Investigation of Carbon Nanotube Sock Formation." MRS Advances 2, no. 1 (2016): 21–26. http://dx.doi.org/10.1557/adv.2016.632.

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ABSTRACTFormation of the carbon nanotube (CNT) sock, which is an assemblage of nanotubes in a thin cylindrical shape, is a prerequisite for continuous production of thread and sheet using the floating catalyst growth method. Although several studies have considered sock formation mechanisms, the dynamics of the sock behavior during the synthesis process are not well understood. In this work, a computational technique is utilized to explore the multiphysics environment within the nanotube reactor affecting the sock formation and structure. Specifically the flow field, temperature profile, catal

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Ech-Cheikh, Fouad, Abdelghani Matine, and Monssef Drissi-Habti. "Preliminary Multiphysics Modeling of Electric High-Voltage Cable of Offshore Wind-Farms." Energies 16, no. 17 (2023): 6286. http://dx.doi.org/10.3390/en16176286.

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During manufacture, handling, transportation, installation and operation, mechanical overstress can affect the electrical and thermal properties of the conductor. As the wires in general are made of copper, which is a very plastically deforming material, these stresses will gradually generate plastic deformations of the copper until the wires start to fail. The objective of this article is to study, by numerical modeling (using Comsol and Abaqus), the impact of damage mechanisms on the electrical and thermal properties of a submarine cable phase. The influence of plasticity and gradual copper

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Alazzam, Malik Bader, Fahima Hajjej, Ahmed S. AlGhamdi, Sarra Ayouni, and Md Adnan Rahman. "Mechanics of Materials Natural Fibers Technology on Thermal Properties of Polymer." Advances in Materials Science and Engineering 2022 (January 7, 2022): 1–5. http://dx.doi.org/10.1155/2022/7774180.

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The thermal characteristics of polymathic methacrylate combined with unsaturated polyester were determined by numerical and experimental research. Models for numerically investigating the parameters of thermal conductivity, specific heat capacity, and thermal diffusivity were developed using COMSOL Multiphysics. The numerical data were then compared to experimental results for the same material using the same measurements to ensure that they were correct. By comparing the thermal conductivity data to two sets of theoretical data, the results were confirmed. The COMSOL models were quite close t

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Huang, Xue Yun, Ting Ting Zhang, and Xi Zhang. "Modeling of Direct Current Atmospheric Pressure Argon Discharge in Two-Dimensional." Advanced Materials Research 852 (January 2014): 597–601. http://dx.doi.org/10.4028/www.scientific.net/amr.852.597.

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The finite element computational package COMSOL multiphysics were used to simulate a bar plate dc discharge in argon at atmospheric pressure. The basic plasma properties such as electron density, ion density, metastable atom density, electron temperature, electric voltage and electric field were studied. The current-voltage (I-V) characteristic of numerical model is in good agreement well with experimental data. This model is simple and insightful as a theoretical tool for argon atmospheric pressure discharges.

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Bouherine, Keltoum, and Olivier Leroy. "Numerical investigation of characteristics and excitation effects on discharge properties in an inductively coupled plasma torch." AIP Advances 13, no. 4 (2023): 045015. http://dx.doi.org/10.1063/5.0139959.

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This paper focuses on an atmospheric-pressure inductively coupled plasma (ICP) torch sustained by an argon discharge. A two-dimensional axisymmetric model is developed for the numerical simulation of the device. Maxwell equations and fluid equations were solved as the governing equations using the COMSOL Multiphysics software. The result presents the electromagnetic fields generated by the ICP, plasma parameters (electron density and temperature), and gas characteristics (gas flow and gas temperature). The study of the effects of excitation parameters (coil current, coil geometry, and coil tur

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Ulkir, Osman, Ishak Ertugrul, Oguz Girit, and Sezgin Ersoy. "Modeling and thermal analysis of micro beam using COMSOL multiphysics." Thermal Science 25, Spec. issue 1 (2021): 41–49. http://dx.doi.org/10.2298/tsci200529005u.

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In this study, the design and analysis of the micro beam is carried out using COMSOL multiphysics. The current passing through the beam distributes the heat energy due to its resistance that pushes the entire micro beam to the desired distance through thermal expansion. This expansion varies depending on the amount of current passing through the beam and the emitted temperature. The purpose of the model created is to estimate the amount of current and temperature increase required to cause displacement in the proposed micro beam using analysis software. In addition, displacements and temperatu

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Zhang, Wenqian, Xupeng Chen, Chongwen Yang, et al. "A Multiphysics Model for Predicting Microstructure Changes and Microhardness of Machined AerMet100 Steel." Materials 15, no. 13 (2022): 4395. http://dx.doi.org/10.3390/ma15134395.

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The machined-surface integrity plays a critical role in corrosion resistance and fatigue properties of ultra-high-strength steels. This work develops a multiphysics model for predicting the microstructure changes and microhardness of machined AerMet100 steel. The variations of stress, strain and temperature of the machined workpiece are evaluated by constructing a finite-element model of the orthogonal cutting process. Based on the multiphysics fields, the analytical models of phase transformation and dislocation density evolution are built up. The white layer is modeled according to the phase

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Lanin, V. L., V. T. Pham, and A. I. Lappo. "Through-silicon-via formation of 3D electronic modules by laser radiation." Doklady BGUIR 19, no. 3 (2021): 58–65. http://dx.doi.org/10.35596/1729-7648-2021-19-3-58-65.

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Laser heating is a promising method for through-silicon-via (TSV) formation in assembling highdensity 3D electronic modules due to its high specific energy and local heating ability. Using laser radiation for the formation of TSV makes it possible to reduce its diameter, indirectly increases the density of elements in 3D electrical modules. Laser system selection depends on the physical and mechanical properties of the processed materials and on the technical requirements for laserprocessing. The reflectivity of most materials increases with the laser wavelength. It was found that with an incr

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