Thematische Bibliographien / Multiphysics properties

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Auswahl der wissenschaftlichen Literatur zum Thema „Multiphysics properties“

Autor: Grafiati

Veröffentlicht am 18. Mai 2024

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Zeitschriftenartikel zum Thema "Multiphysics properties"

Zaporozhets, Yu, A. Ivanov, Yu Kondratenko, V. Tsurkin und N. Batechko. „Innovative System of Computer Modelling of Multiphysics Processes for Controlled Electrocurrent Treatment of Melts“. Science and Innovation 18, Nr. 4 (14.08.2022): 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 multiphysics processes of melt electrocurrent treatment have led to an unconventional approach to the formulation of their mathematical models and computational procedures. These circumstances have determined the features of the tasks for the construction of appropriate computer models and their application.Purpose. The development of a new pattern-modular system for computer modeling of multiphysics processes of electric current treatment of melts to control the conditions of the formation of a qualitative structure of castings.Materials and Methods. The material of the research is a set of model problems of multiphysical processes of electrocurrent treatment and their ontology, the integral equations and their properties, as well as databases on the parameters of simulated objects, which describe these processes. The method of ontological taxonomy has been used to create a taxonomic codifier, with the help of which model problems and mathematical tools for their solution have been systematized. Based on the signs of similarity, the method of formalization of integral equations of coupled multiphysics processes has been applied. Results. The unified patterns of basic algorithmic procedures and a library of program modules for computing operations of partial tasks, for which a unique code is assigned according to the codifier have been developed. Combining the patterns with different modules that are identified by the indicated codes has made it possible to form a wide range of computer models reflecting multiphysics processes. A flexible system for computer modeling of multiphysical processes has been built and its efficiency for simulating the modes of electrocurrent treatment of melts has been confirmed.Conclusions. The results obtained have enabled controlling the conditions of electrocurrent treatment of melts to form a highquality structure of cast metal.

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Lin, Yihao, Yang Qin, Bilin Gong, Can Yin, Liang Xia, Ganggang Liu, Kailin Pan und Yubing Gong. „Analysis of the Parallel Seam Welding Process by Developing a Directly Coupled Multiphysics Simulation Model“. Processes 12, Nr. 1 (28.12.2023): 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 PSW process. First, this paper conducts an in-depth theoretical analysis of thermal and electrical contact interactions at all contact interfaces within the PSW process, taking into account material properties related to temperature. Second, the acquired data are integrated into a geometric model encompassing electrode wheels and ceramic packaging components, facilitating a strongly coupled multiphysics simulation. Finally, the experimental results show that the simulated weld area deviates by approximately 6.5% from the actual values, and the highest component temperature in the model exhibits an approximate 10.8% difference from the actual values, thus validating the accuracy of the model. This directly coupled multiphysics simulation model provides essentially a powerful tool for analyzing the dynamic processes in the PSW process.

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Zhao, Xiaoyu, Guannan Wang, Qiang Chen, Libin Duan und Wenqiong Tu. „An effective thermal conductivity and thermomechanical homogenization scheme for a multiscale Nb3Sn filaments“. Nanotechnology Reviews 10, Nr. 1 (01.01.2021): 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, Nb3Sn may experience high heat flux due to low resistivity of Nb3Sn in the normal state. The intrinsic hierarchical microstructure of Nb3Sn filament groups and Multiphysics loading conditions make LEHT an ideal candidate to conduct the homogenized thermal conductivities and thermomechanical analysis. First, a comparison with a finite element analysis is conducted to validate effectiveness of Multiphysics LEHT and good agreement is obtained for the homogenized thermal conductivities and mechanical and thermal expansion properties. Then, the Multiphysics LEHT is applied to systematically investigate the effects of volume fraction and temperature on homogenized thermal conductivities and thermomechanical properties of Nb3Sn filaments at the microscale and mesoscale. Those homogenized properties provide a full picture for researchers or engineers to understand the Nb3Sn homogenized properties and will further facilitate the material design and application.

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Giurgea, S., T. Chevalier, J. L. Coulomb und Y. Marchal. „Unified physical properties description in a multiphysics open platform“. IEEE Transactions on Magnetics 39, Nr. 3 (Mai 2003): 1642–45. http://dx.doi.org/10.1109/tmag.2003.810182.

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Bukshtynov, Vladislav, und Bartosz Protas. „Optimal reconstruction of material properties in complex multiphysics phenomena“. Journal of Computational Physics 242 (Juni 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, Nr. 4 (30.12.2023): 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 physics simulations. (CdSe and CdTe) were simulated to show the effects of mechanical stress. We use a physical model called Solid Mechanics to model the effect of mechanical stress. The results show that when pressure was applied at different levels (50pa, 100pa, 200pa, 300pa, 400pa), the strain values of (CdSe or CdTe) were similar, but (CdSe) was more resistant to deformation than (CdTe).

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Sanfilippo, Danilo, Bahman Ghiassi, Alessio Alexiadis und 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, Nr. 7 (24.03.2021): 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 the interface between the mastic and the aggregate. In the presence of voids, they ‘jump’ from one void to the closest void. Water expansion is modelled by coupling Peridynamics with repulsive forces in the context of Discrete Multiphysics. Freezing water expands against the voids’ internal surface, building tension in the material. A network of cracks forms in the asphalt, weakening its mechanical properties. The proposed methodology provides a computational tool for generating samples of ‘digital asphalt’ that can be tested to assess the asphalt properties under different operating conditions.

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Belov, A. V., O. V. Kopchenov, A. O. Skachkov und D. E. Ushakov. „Solid-state explosion simulation in COMSOL Multiphysics“. Multiphase Systems 14, Nr. 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 geometry of the explosion and the area where the mesh is indicated. The tank has dimensions: 10.39 m in length and diameter 2.9 m. The wall thickness of the tank is 0.01 m. To model the explosion, the Solid Mechanics interface was used, located in the Structural Mechanics branch, based on solving equations of motion together with a model for solid material. Results such as displacement, stress, and strain are calculated. The force per unit volume (Fv) is specified by the normal pressure in the sphere. Also, the tensile strength was calculated for this steel grade: upon reaching a certain pressure in the tank (7.26 MPa), the simulation stops, and the system notifies at what point in time the destruction occurred. A Time Dependent Study is used. Seconds are used as a unit of time. The task is calculated from 0 seconds (initial moment of time) to 0.003 seconds (final moment of time) with a construction step of 0.00005.

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Qu, Danqi, und Hui-Chia Yu. „Multiphysics Electrochemical Impedance Simulations of Complex Multiphase Electrodes“. ECS Meeting Abstracts MA2023-02, Nr. 54 (22.12.2023): 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 surface areas. In two-phase coexistence graphite particles with phase boundaries present on the particle surfaces, the simulations exhibited an inductive loop on the EIS curve. In core-shell phase-morphology cases, the EIS measurements reflected only the properties of the shells. The resulting EIS curves were indistinguishable from those in the single-phase cases. While Fick's law of diffusion has been mistakenly employed to model Li transport in phase-separating graphite electrodes, our simulations showed that the EIS curves obtained using the Fickian diffusion model were very similar to those obtained using the Cahn-Hilliard phase-field model. This tool provides unprecedentedly detailed simulations to connect the intrinsic material properties, electrochemical processes in the microstructures, and resulting EIS behavior. Figure 1

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Nilboworn, Salakjit, Phairote Wounchoum, Warit Wichakool und 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 thinknesses of rubber composite sheets were used in the experiment, specifically 0.7 mm, 1.7 mm, and 2.9 mm. From the physical dimension of the test setup, capacitance (C), dissipation factor (D), relative permitivity (εr), and conductivity (σ) can be calculated. These extracted parameters together with the physical dimension of the test structure were used to create COMSOL multiphysics simulation models. The program can simulate non-linear modeling of the rubber composite under different electromagnetic constrains. The simulation results were compared to the measured results for all samples. Comparison results show that all electrical parameters were closly matched, indicating that the COMSOL multiphysics models were correctly generated. The results also indicate that the conductivity and the relative permittivity of the tested rubber composite change dramatically at the frequency above 10 MHz. The results indicate the physical limit of the tested rubber composite in the sensing application. The simulation model proposed in this paper can be used to design and possibly predict the geometical and electrical properties of the rubber composite in future applications.

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Dissertationen zum Thema "Multiphysics properties"

Kaneiwa, Kubo Mirian Tiaki. „Thermal process of fruit juices using microwaves : multiphysics modeling and enzyme inactivation“. Thesis, Nantes, Ecole nationale vétérinaire, 2018. http://www.theses.fr/2018ONIR116F/document.

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Ce travail vise à étudier l'intérêt duchauffage micro-ondes pour l'inactivation desenzymes dans les jus de fruit, à travers desapproches numériques et aussi expérimentales.En premier lieu, une étude sur les propriétésdiélectriques des jus de fruits modèles est menée,démontrant leur forte sensibilité à la température,à la fréquence et à la composition du produit. Dansune seconde partie, l'inactivation de la peroxydaseest étudiée par chauffage conventionnel et lesdonnées sont ajustées par un modèle cinétique dupremier ordre. Dans la troisième et principalepartie de ce travail, un modèle tridimensionnel,résolu par éléments finis, est proposé pour simulerle chauffage par micro-ondes du jus, en couplantélectromagnétisme, transfert de chaleur etécoulement, avec la cinétique d'inactivation de laperoxydase précédemment déterminée.Cette simulation permet de prédire la distributionspatiale de la température, le profil d’écoulementet l'inactivation de la peroxydase. L’accord entre lemodèle et les expériences est très satisfaisant, cequi confirme la pertinence de l’approche. Dans ladernière partie, les réactivations de la peroxydaseaprès chauffage conventionnel et micro-ondessont évaluées et comparées. Enfin, l’éventuelleexistence d’effets non thermiques des microondesest discutée via des expériencesadditionnelles. En conclusion, ces travauxmontrent tout l’intérêt de la simulation numériquecomme outil de compréhension du processusmultiphysique du chauffage par micro-ondes pourl’inactivation des enzymes, ce qui peut êtreparticulièrement intéressant pour la conception etl’optimisation de traitements micro-ondes
This work aims at studying the use ofmicrowave heating for enzyme inactivation in fruitjuices by means of numerical and experimentalapproaches. In the first part, a study on thedielectric properties of model fruit juices isconducted, evidencing their high dependence onthe temperature, frequency and composition of theproduct. Then in the second part, the inactivation ofperoxidase is studied using conventional heatingand the data are fitted by a first order kinetic model.In the third and main part of this work, a threedimensionalfinite element model is developed tosimulate the microwave heating of juices, couplingelectromagnetics, heat transfer and fluid flow aswell as the peroxidase inactivation kineticspreviously determined.As a result, spatial temperature distribution, flowpattern and peroxidase inactivation are obtained.The model is experimentally validated and goodagreement is observed, confirming the relevanceof the approach. Finally, in the last part, thepotential peroxidase reactivations afterconventional and microwave heating areassessed and compared. Also, the possibleexistence of non-thermal effects of microwaves isdiscussed thanks to additional experimentations.In conclusion, this work shows the large interest ofcomputer simulation as a tool for understandingthe multiphysics process of microwave heating forenzyme inactivation, which can be particularlyinteresting for further design of optimizedmicrowave processing

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GALIZIA, PIETRO. „Production and morphological and microstructural characterization of bulk composites or thick films for the study of multiphysics interactions“. Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2674672.

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The surge of interest in multifunctional materials over the past 15 years has been driven by their fascinating physical properties and huge potential for technological applications such as sensors, microwave devices, energy harvesting, photovoltaic technologies, solid-state refrigeration, and data storage recording technologies. Among the others, magnetoelectric multiferroic composites are a special class of advanced solid-state compounds with coupled ferromagnetic and ferroelectric ferroic orders which allow to perform more than one task by combining electronic, magnetic and mechanical properties into a single device component. The production and characterization of lead zirconate titanate (PZT)- cobalt ferrite composites was the main topic of the thesis. During the PhD activity different ceramic processing and characterization technologies were studied and involved in order to optimize the produced materials as a function of the final microstructural and functional properties. The synthesis of cobalt ferrite (CF) and niobium-doped lead zirconate titanate (PZTN) powders by solid state reaction method and sol-gel technique, to control the particle size distributions and their microstructural and functional properties through calcination and milling treatments has been addressed first, followed by the mixing of the PZT and CF powders to produce particulate composites. The dispersion of PZT and CF in a liquid media, to produce layered composites by depositing the particles by electrophoretic deposition was an objective of the work as well. Key issues such as the lead loss during the sintering of PZTN-CF composites and the reaction between CF and titania have been addressed and have resulted in improvements in the sintering and characterization techniques leading to the production of fully dense PZTN-CF dual-particulate composites. In particular, the optimized sintering parameters have configured a new paradigm of ceramic sintering, which has been called quite-fast sintering, in respect to the traditional one, and the study of the PbO loss has led to propose an equation to calculate the PbO loss through XRD analysis. Further important achieved results were: the production of nanocobalt ferrite particles by multi-step milling, the correlation between the spin-canting angle with the microstrain and the average crystallite size of nanocobalt ferrite particles, the understanding of the CF growth mechanisms, the extension of the Globus model from small ferromagnetic grains “having no defect inside” to multiparallel-twinned overgrown ones, the understanding of heating rate effect on the interface nucleation onset of the anatase-to-rutile transformation and the anatase particle size, and the reaction products between CF and rutile at 1200 °C at the variation of CF/rutile ratio.

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Neshasteh, Hamidreza. „Ultra-high frequency optomechanical disk resonators in liquids“. Electronic Thesis or Diss., Université Paris Cité, 2023. http://www.theses.fr/2023UNIP7132.

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Dans cette thèse, nous présentons une étude approfondie des résonateurs à disques optomécaniques ultra-haute fréquence, en fonctionnement dans divers environnements liquides. L'objectif du travail était de développer des techniques expérimentales optiques et des modèles théoriques pour étudier les interactions fluide-structure dans des dispositifs micro ou nanométriques vibrants, ayant des applications potentielles en fluidique, en détection pour le biomédical et en science des matériaux. Nous avons appliqué des techniques de transduction optomécaniques à des résonateurs à disque en silicium pour mesurer diverses propriétés des liquides. En s'appuyant sur des modèles analytiques et numériques, nos mesures permettent de remonter à l'indice de réfraction, la conductivité thermique, la viscosité, la densité et la compressibilité du liquide. Nous avons notamment obtenu des expressions explicites pour le décalage en fréquence et le facteur de qualité mécanique d'un disque immergé dans un liquide, le transformant en un rhéomètre calibré. Puisque ce rhéomètre couvre la gamme de fréquences de 200 MHz à 3 GHz, nous avons pu observer d'importants effets de compressibilité dans l'eau, et confirmé que ce liquide reste pour autant newtonien dans cette gamme. En revanche, le 1-décanol liquide présente un comportement non newtonien, avec une viscosité dépendant de la fréquence, et des temps de relaxation associés proche de la nanoseconde que nous avons pu mettre en évidence expérimentalement. Le travail de thèse apporte un éclairage sur le comportement des résonateurs à disque optomécanique immergés, et démontre leur potentiel pour sonder les propriétés multiphysiques d'un liquide à l'échelle micronique
In this thesis, we present an in-depth study of ultra-high frequency optomechanical disk resonators operating in various liquid environments. The goal of the work was to develop optical experimental techniques and theoretical models to study fluid-structure interactions in micro- and nanoscale vibrating devices, with potential applications in fluidics, biomedical sensing, and materials science. We employed optomechanical transduction techniques on silicon disk resonators to measure various properties of liquids. Backed by analytical and numerical models, our measurements give access to the liquid's refractive index, thermal conductivity, viscosity, density, and compressibility. We notably derived closed-formed expressions for the mechanical frequency shift and quality factor of a disk immersed in liquid, transforming it into a calibrated rheometer. As this rheometer covers the frequency range from 200 MHz to 3 GHz, we observed pronounced compressibility effects in liquid water, and confirmed that this liquid remains Newtonian in this range. In contrast, 1-decanol liquid exhibits a non-Newtonian behavior, with a frequency-dependent viscosity associated with relaxation times that we could reveal experimentally. The thesis work provides insights into the behavior of immersed optomechanical disk resonators and demonstrates their potential to probe the multiphysics properties of a liquid at the micron scale

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Varghese, Julian. „A Finite Element Framework for Multiscale/Multiphysics Analysis of Structures with Complex Microstructures“. 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-7054.

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This research work has contributed in various ways to help develop a better understanding of textile composites and materials with complex microstructures in general. An instrumental part of this work was the development of an object-oriented framework that made it convenient to perform multiscale/multiphysics analyses of advanced materials with complex microstructures such as textile composites. In addition to the studies conducted in this work, this framework lays the groundwork for continued research of these materials. This framework enabled a detailed multiscale stress analysis of a woven DCB specimen that revealed the effect of the complex microstructure on the stress and strain energy release rate distribution along the crack front. In addition to implementing an oxidation model, the framework was also used to implement strategies that expedited the simulation of oxidation in textile composites so that it would take only a few hours. The simulation showed that the tow architecture played a significant role in the oxidation behavior in textile composites. Finally, a coupled diffusion/oxidation and damage progression analysis was implemented that was used to study the mechanical behavior of textile composites under mechanical loading as well as oxidation. A parametric study was performed to determine the effect of material properties and the number of plies in the laminate on its mechanical behavior. The analyses indicated a significant effect of the tow architecture and other parameters on the damage progression in the laminates.

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„A multiscale multiphysics investigation of aluminum friction stir welds : from thermal modelling to mechanical properties through precipitation evolution and hardening“. Université catholique de Louvain, 2006. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-07062006-164823/.

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Bücher zum Thema "Multiphysics properties"

Tiwari, Sandip. Electromechanics and its devices. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198759874.003.0005.

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Electromechanics—coupling of mechanical forces with others—exhibits a continuum-to-discrete spectrum of properties. In this chapter, classical and newer analysis techniques are developed for devices ranging from inertial sensors to scanning probes to quantify limits and sensitivities. Mechanical response, energy storage, transduction and dynamic characteristics of various devices are analyzed. The Lagrangian approach is developed for multidomain analysis and to bring out nonlinearity. The approach is extended to nanoscale fluidic systems where nonlinearities, fluctuation effects and the classical-quantum boundary is quite central. This leads to the study of measurement limits using power spectrum and, correlations with slow and fast forces. After a diversion to acoustic waves and piezoelectric phenomena, nonlinearities are explored in depth: homogeneous and forced conditions of excitation, chaos, bifurcations and other consequences, Melnikov analysis and the classic phase portaiture. The chapter ends with comments on multiphysics such as of nanotube-based systems and electromechanobiological biomotor systems.

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Delgado Martín, Jordi, Andrea Muñoz-Ibáñez und Ismael Himar Falcón-Suárez. 6th International Workshop on Rock Physics: A Coruña, Spain 13 -17 June 2022: Book of Abstracts. 2022. Aufl. Servizo de Publicacións da UDC, 2022. http://dx.doi.org/10.17979/spudc.000005.

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[Abstract] The 6th International Workshop on Rock Physics (6IWRP) was held A Coruña, Spain, between 13th and 17th of June, 2022. This meeting follows the track of the five successful encounters held in Golden (USA, 2011), Southampton (UK, 2013), Perth (Australia, 2015), Trondheim (Norway, 2017) and Hong Kong (China, 2019). The aim of the workshop was to bring together experiences allowing to illustrate, discuss and exchange recent advances in the wide realm of rock physics, including theoretical developments, in situ and laboratory scale experiments as well as digital analysis. While rock physics is at the core of the oil & gas industry applications, it is also essential to enable the energy transition challenge (e.g. CO2 and H2 storage, geothermal), ensure a safe and adequate use of natural resources and develop efficient waste management strategies. The topics of 6IWRP covered a broad spectrum of rock physics-related research activities, including: • Experimental rock physics. New techniques, approaches and applications; Characterization of the static and dynamic properties of rocks and fluids; Multiphysics measurements (NMR, electrical resistivity…); Deep/crustal scale rock physics. • Modelling and multiscale applications: from the lab to the field. Numerical analysis and model development; Data science applications; Upscaling; Microseismicity and earthquakes; Subsurface stresses and tectonic deformations. • Coupled phenomena and rock properties: exploring interactions. Anisotropy; Flow and fractures; Temperature effects; Rock-fluid interaction; Fluid and pressure effects on geophysical signatures. • The energy transition challenge. Applications to energy storage (hydrogen storage in porous media), geothermal resources, energy production (gas hydrates), geological utilization and storage of CO2, nuclear waste disposal. • Rock physics templates: advances and applications. Quantitative assessment; Applications to reser voir characterization (role of seismic wave anisotropy and fracture networks). • Advanced rock physics tools. Machine learning; application of imaging (X-ray CT, X-ray μCT, FIB-SEM…) to obtain rock proper ties. This book compiles more than 50 abstracts, summarizing the works presented in the 6IWRP by rock physicists from all over the world, belonging to both academia and industry. This book means an updated overview of the rock physics research worldwide.

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Buchteile zum Thema "Multiphysics properties"

Ebrahimi, Davoud, Roland J. M. Pellenq und Andrew J. Whittle. „SIMULATION OF HYDRATION AND ELASTIC PROPERTIES OF MONTMORILLONITE USING MOLECULAR DYNAMICS“. In Multiscale and Multiphysics Processes in Geomechanics, 105–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19630-0_27.

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Makni, Hajer, Frédéric Becquart, Mohamed Khlif, Nor-Edine Abriak und Chedly Bradai. „Multiphysics Properties of Fired Clay Bricks Incorporating Deinking Paper Sludge“. In Springer Proceedings in Materials, 261–69. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-2000-2_30.

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Juliano, Pablo, Francisco Javier Trujillo, Gustavo V. Barbosa-Cánovas und Kai Knoerzer. „The Need for Thermophysical Properties in Simulating Emerging Food Processing Technologies“. In Innovative Food Processing Technologies: Advances in Multiphysics Simulation, 23–38. Oxford, UK: Blackwell Publishing Ltd., 2011. http://dx.doi.org/10.1002/9780470959435.ch2.

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Zhdanov, Michael S. „Joint Inversion Based on Analytical and Statistical Relationships Between Different Physical Properties“. In Advanced Methods of Joint Inversion and Fusion of Multiphysics Data, 163–76. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-6722-3_8.

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Zietsman, Johannes H. „Efficient Storage and Recall of Slag Thermochemical Properties for Use in Multiphysics Models“. In Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016, 635–44. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48769-4_68.

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Zietsman, Johannes H. „Efficient Storage and Recall of Slag Thermochemical Properties for Use in Multiphysics Models“. In Advances in Molten Slags, Fluxes, and Salts, 635–44. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119333197.ch68.

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Ding, Shirui, Haoqing Yang und Jiabao Xu. „Probabilistic Analysis of a Braced Excavation Considering Soil Spatial Variability“. In Lecture Notes in Civil Engineering, 151–59. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_14.

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AbstractDeep braced excavations are generally known to be associated with risks from various sources. The inherent uncertainty of soil strength properties is one of the primary factors that influence the deformation of the retaining wall and the ground settlement. In this study, the numerical model of a braced excavation is firstly established by an elastic-plastic model with Drucker-Prager failure criterion in COMSOL Multiphysics. Random field theory is used to simulate the spatial variability of Young’s modulus. The uncertainty of braced excavation on ground settlement and deflection of retaining wall by stages are studied by Monte Carlo simulation based on 500 random fields. The struts can lessen the uncertainty of wall deflection during excavation but have a limited impact on settlement. The deterministic result may underestimate the settlement of braced excavation. The uncertainty of wall deflection is significantly reduced after the first strut. The uncertainty of wall deflection above the depth of struts is well-controlled at the final stage of excavation.

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„Chapter 2 Materials Properties Using COMSOL Multiphysics 4.x“. In Multiphysics Modeling Using COMSOL®4, 57–78. De Gruyter, 2012. http://dx.doi.org/10.1515/9781937585730-004.

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„Chapter 2: Materials Properties Using COMSOL Multiphysics 5.x“. In Multiphysics Modeling Using COMSOL 5 and MATLAB, 65–88. De Gruyter, 2022. http://dx.doi.org/10.1515/9781683925873-004.

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„Chapter 2 Materials Properties Using COMSOL Multiphysics 5.x“. In Multiphysics Modeling Using COMSOL5 and MATLAB [OP], 65–86. De Gruyter, 2015. http://dx.doi.org/10.1515/9781683922926-004.

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Konferenzberichte zum Thema "Multiphysics properties"

Lodi, Matteo Bruno, und Alessandro Fanti. „Multiphysics Modeling of Magnetic Scaffolds for Biomedical Applications“. In 2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP). IEEE, 2021. http://dx.doi.org/10.1109/nap51885.2021.9568562.

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San Roman Alerigi, Damian P., Weichang Li, Adrian Cavazos Sepulveda und Sameeh Batarseh. „AI inference of multiphysics properties using hyperspectral data“. In Optical Technology and Measurement for Industrial Applications Conference, herausgegeben von Takeshi Hatsuzawa, Yukitoshi Otani, Rainer Tutsch und Toru Yoshizawa. SPIE, 2023. http://dx.doi.org/10.1117/12.3005526.

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Prabhakar, Sanjay, und Roderick Melnik. „Multiphysics effects and electronic properties of anisotropic semiconductor quantum dots“. In 2013 IEEE XXXIII International Scientific Conference on Electronics and Nanotechnology (ELNANO 2013). IEEE, 2013. http://dx.doi.org/10.1109/elnano.2013.6552020.

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Kraishan, Ghazi M., Shouxiang Mark Ma, Evgeny Dyshlyuk, Salah M. Al-Ofi, Andrea Valori, Wael Abdallah und Steve Crary. „Improved Characterization of Carbonate Rock Properties: A Multiphysics Integrated Approach“. In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/181539-ms.

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Kamarudin, M. S., N. H. Radzi, A. Ponniran und R. Abd-Rahman. „Simulation of Electric Field Properties for Air Breakdown using COMSOL Multiphysics“. In 4th IET Clean Energy and Technology Conference (CEAT 2016). Institution of Engineering and Technology, 2016. http://dx.doi.org/10.1049/cp.2016.1298.

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Michopoulos, John G., Athanasios Iliopoulos und Marcus Young. „Towards Static Contact Multiphysics of Rough Surfaces“. In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71055.

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This paper is describing the current status of ongoing work on developing a comprehensive modeling and simulation infrastructure capable of addressing the multiphysics behavior aspects of rough surfaces in contact. The electrical and thermal response of bodies in contact under the influence of mechanical load electric currents and thermal fluxes, is a topic of interest for many application areas. We are presenting a multiscale theory leading to derivations of expressions of electric and thermal conductivities for the case of static contact. The associated model contains both an asperity based comprehensive model as well as its continuum level coupling. The mechanical pressure and the repulsion effect from electric current through the micro-contacts as well as temperature and strain rate dependence of the plastic behavior of the asperity are accounted for as well. This formalism enables the derivation of physical properties from surface topography and bulk material properties for the interface between two rough surfaces in contact. Numerical analysis results present the dependence of the derived properties from the surface characteristics applied external load and the electric current.

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Vinogradov, Kirill A., Gennady V. Kretinin, Igor A. Leshenko, Kseniia V. Otriakhina, Konstantin S. Fedechkin, Olga V. Vinogradova, Vyacheslav V. Bushmanov und Roman V. Khramin. „Robust Multiphysics Optimization for Fan Blade Aerodynamic Efficiency, Structural Properties and Flutter Sensitivity“. In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76816.

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A fan blade is a complicated object and obviously it is subjected to geometrical uncertainties from manufacture tolerances and other production deviations. In spite of all uncertainties a fan blade should provide stable aerodynamic efficiency and strength properties. That is why it is considered to solve a multidimensional and multidisciplinary optimization task (aerodynamics, strength and flutter sensitivity) in robust statement under geometrical uncertainties. In the proposed test case geometrical uncertainties from the fan blade manufacture tolerances and deviations are considered. The probability density function (pdf) was obtained as a result of statistical operation upon the results of blade coordinate measurements. Approximately 2500 fan blades were measured by means of CMM process to reconstruct the pdf for more than 40 geometrical uncertainties (there are blade thicknesses for different airfoil locations in several cross-sections). CFD and FEM calculations were carried out in NUMECA FINE/Turbo and ANSYS software, correspondingly. The surrogate model technique (the response surface and the Monte-Carlo method implemented to RSM results) was applied for the uncertainty quantification and the robust optimization process for the task under consideration. APPROX software was used for surrogate model construction. The IOSO technology was employed as one of the robust optimization tools. This technology is also based on a widespread application of the response surface technique. As a result, robust optimal solutions (the Pareto set) for all 4 considered criteria (aerodynamic efficiency, structural properties, stall margin and flutter sensitivity) were obtained. The probabilistic criteria were assessed based on the results obtained. The robust optimization results were compared with the deterministic optimization results.

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Ulrich, Christian, Sven Bednarek und Thomas Rung. „Multiphysics SPH Simulations With Local Particle Coarsening“. In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49197.

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The paper reports on Smoothed-Particle-Hydrodynamics (SPH) for multi-physics water/soil interaction computations with dynamic particle coarsening. The procedure is supposed to be applied to harbour and ocean engineering hydrodynamic problems focussing on sediment scouring. This type of simulation usually implies large computational domains, fluid-soil interaction and complex geometries leading to large numbers of particles. To achieve a reasonable time-to-solution even for full-scale simulations, effective strategies to increase the computational performance are needed. We present a dynamic particle refinement/coarsening strategy based on variable particle masses and spacings. The particle properties are updated in accordance to their current location. Validation studies refer to different water/soil interaction test cases. Results obtained from the present refinement/coarsening approach show an encouraging predictive and computational performance.

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Sundaresan, Vishnu-Baba. „Frequency Dependent Ion Rejection Properties of Active Nanoporous Membranes“. In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3202.

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Selective rejection of dissolved salts in water is achieved by large pressure gradient driven flows through tortuous structures and cylindrical nanopores. The flow rate through the membrane is dependent on the area of the membrane and pressure gradient that can be sustained by the membrane. The electrical power required for generating large pressure gradients increases the operational cost for desalination units and limits application of contemporary technologies in a wide variety of applications. Due to this limitation, small scale operation of these desalination systems is not economical and portable. Further, recently proposed desalination systems using carbon nanotubes and nanofluidic diodes have limited lifetime due to clogging and fouling from contaminants in feed water. In order to develop a desalination system that is not limited by cost, scale of operation and application, an active nanopore membrane that uses multiphysics interactions in a surface-functionalized hyperboloidal nanopore is developed. An active nanopore is a shape-changing hyperboloidal pore that is formed in a rugged electroactive composite membrane and utilizes coupled electrostatic, hydrodynamic and mechanical interactions due to reversible mechanical oscillations between the charged pore walls and dissolved ions in water for desalination. This novel approach takes advantage of the shape of the pore to create a pumping action in the hyperboloidal channel to selectively transport water molecules. In order to demonstrate the applicability of this novel concept for water desalination, the paper will use a theoretical model to model the ion rejection properties and flow rate of purified water through an active nanoporous membrane. This article examines the effect of the geometry of the nanopore and frequency of operation to reject dissolved ions in water through a multiphysics model. It is estimated that the neck diameter of the active nanopores is the most dominant geometrical feature for achieving ion rejection, and the flux linearly increases with the frequency of operation (between 2–50Hz). The threshold neck diameter of the nanopore required for achieving rejection from multiphysics simulation is observed to be 100nm. The flux through the membrane decreases significantly with decreasing diameter and becomes negligible at 10nm effective neck diameter.

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Li, Changyou, Qian Zhu und Xiaoquan He. „Electromagnetic properties and optimizations of the laminated composites“. In 2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO). IEEE, 2020. http://dx.doi.org/10.1109/nemo49486.2020.9343477.

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