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Journal articles on the topic 'Multiphysic imager'

Author: Grafiati

Published: 29 February 2024

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1

Zolotukhin P. A., Il'ichev E. A., Petrukhin G. N., Popov A. V., Rychkov G. S., and Teverovskaya E. G. "Calculation and optimization of the limiting characteristics of a single-channel dual-spectrum image receiver of objects emitting in the ultraviolet range." Technical Physics 92, no. 9 (2022): 1254. http://dx.doi.org/10.21883/tp.2022.09.54691.97-22.

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A single-channel, two-spectral image receiver of objects emitting in UV radiation, made in the image intensifier tube architecture, was proposed and investigated. With the help of the COMSOL Multiphysics software package, search optimal measurements of the potential on the elements of the image receiver (silicon membrane, germanium and diamond photocathode, MCP input and output sensors) were implemented, which provides the possibility of registering and presence of UV objects in relation to the terrain. Keywords: image intensifier tube, diamond photocathode, germanium photocathode, ultraviolet

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Kim, Yoon Young, Jae Chun Ryu, Eunil Kim, Hyoungkee Kim, and Byungseong Ahn. "A Variational Art Algorithm for Image Generation." Leonardo 49, no. 3 (2016): 226–31. http://dx.doi.org/10.1162/leon_a_00914.

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The authors propose a variational art algorithm: a virtual system-based optimization algorithm developed for generating images. Observing that the topology optimization method used for multiphysics system design can produce two- or three-dimensional layouts without baselines, the authors propose to expand it beyond engineering applications for generating images. They have devised a virtual physical system—a heat-path system—that “interprets” the optimization-based process of image generation as the simultaneous drawing of multiple strokes in a painting.

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Leslie, Nathaniel, and Janine Mauzeroll. "Simulating Scanning Electrochemical Microscopy Images of Arbitrarily Shaped Reactive Sites without a Site-Specific Model." ECS Meeting Abstracts MA2022-01, no. 46 (2022): 1947. http://dx.doi.org/10.1149/ma2022-01461947mtgabs.

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Scanning electrochemical microscopy (SECM) yields two-dimensional electrochemical images when the current at a microelectrode is recorded as it moves above a surface generating redox species. As SECM images are often systematically compared to microstructure features obtained by electron microscopy there is a clear need to find ways to integrate electron microscopy images into SECM image simulations. Recently, finite element method simulations of sites where electrochemical reactions take place is employed to evaluate reactive feature size.[1] Current models move the microelectrode or the reac

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Luo, Yongzhen, Guocong Lin, Xidong Ding, and Tao Su. "The detection of buried nanopillar based on electrostatic force microscopy simulation." AIP Advances 12, no. 6 (2022): 065211. http://dx.doi.org/10.1063/5.0088843.

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Based on electrostatic force microscopy (EFM), the image of nano-objects buried below the surface was numerically simulated by using COMSOL Multiphysics® software. The shape and the approximate size of the buried pillar could be obtained from the simulated EFM images. It was demonstrated that the detection of the buried nanopillar based on EFM was feasible. When the image data measured by EFM were used as the input data for comparison with the simulated data, the three unknowns (relative dielectric constant ε r, p, buried depth d, and side length l) of the buried pillar could be obtained. In t

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Yang, Dan, Jiahua Liu, Yuchen Wang, Bin Xu, and Xu Wang. "Application of a Generative Adversarial Network in Image Reconstruction of Magnetic Induction Tomography." Sensors 21, no. 11 (2021): 3869. http://dx.doi.org/10.3390/s21113869.

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Image reconstruction of Magnetic induction tomography (MIT) is an ill-posed problem. The non-linear characteristics lead many difficulties to its solution. In this paper, a method based on a Generative Adversarial Network (GAN) is presented to tackle these barriers. Firstly, the principle of MIT is analyzed. Then the process for finding the global optimum of conductivity distribution is described as a training process, and the GAN model is proposed. Finally, the image was reconstructed by a part of the model (the generator). All datasets are obtained from an eight-channel MIT model by COMSOL M

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Grevcev A. S., Zolotukhin P. A., Il'ichev E. A., Petruhin G. N., Popov A. V., and Rychkov G. S. "The thermal image receiver realized in the electron-optical converter architecture." Technical Physics 92, no. 4 (2022): 419. http://dx.doi.org/10.21883/tp.2022.04.53597.270-21.

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An innovative design is considered, and the results of analysis and calculations of the characteristics of a thermal image receiver (3-15 microns), made in the electron-optical converter architecture, are presented. For the sensor-converting pyroelectric unit of the electron-optical converter, the spatial dependences of the electric field strengths and the values of the electric potentials on the spontaneous polarization of the film substance are calculated. Estimates are obtained and the characteristics of thermal-field-induced polarization of various pyroelectric films are discussed. The tem

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Yang, Liu, Chun Guang Xu, Xiang Hui Guo, et al. "Multi-Objects Ultrasonic Tomography by Immersion Circular Array." Advanced Materials Research 1006-1007 (August 2014): 879–83. http://dx.doi.org/10.4028/www.scientific.net/amr.1006-1007.879.

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The typical application of ultrasonic tomography is the determination of process parameters like component flow rates and material fractions in industrial environment. Another promising application is non-invasive health monitoring in medical care. Both acoustic attenuation and acoustic impedance inhomogeneity are the main physical quantities that are used to reconstruct the image. When transmission ultrasonic waves are shadowed by hard tissue because of severe attenuation, the reflection mode can be an effective supplement. This paper provides multi-objects reconstruction images by reflection

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Sukor, Nur Syafiqah Amirah Ab, Fatinah Mohd Rahalim, Juliza Jamaludin, and Normaliza Ab Malik. "A Conceptual Model of Dual-Mode Tomography Technique for Dental Diagnostics: Ultrasound and Light Propagation Analysis." Journal of Physics: Conference Series 2641, no. 1 (2023): 012008. http://dx.doi.org/10.1088/1742-6596/2641/1/012008.

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Abstract Many advanced imaging modalities, such as magnetic resonance imaging (MRI), X-ray Computed Tomography, Positron Emission Tomography (PET), Ultrasound, Single Photon Emission Computed Tomography (SPECT), and the most recent, Optical Coherence Tomography (OCT), have been developed for identifying dental tissues images and detecting changes in early carious lesions. Some modalities use high doses of radiation and energy to obtain more information, which may be harmful to patient’s health. Most early commercial OCTs had drawbacks such as its bulky size and limited image resolution. In ord

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Razali, Nazirah Mohd, Muhammad Quisar Lokman, Siti Nur Fatin Zuikafly, Fauzan Ahmad, and Hafizal Yahaya. "Simulation of Self-Image Interference in Single Mode-No-Core-Single Mode Fiber with COMSOL Multiphysics®." Journal of Physics: Conference Series 2411, no. 1 (2022): 012019. http://dx.doi.org/10.1088/1742-6596/2411/1/012019.

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Abstract Self-image interference in a single mode-no-core-single mode fiber plays an important role especially for length optimization before acting as a sensor. The interference can be observed through optical simulation software. Past literature has successfully demonstrated the interference via COMSOL Multiphysics®, but the simulation was not restricted to the use of important domains and settings such as perfectly matched layer and surrounding domain causing imprecise simulation results. This paper proposes a simulation of self-image interference in a single mode-no-core-single mode fiber

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Chin, Lixin, Andrea Curatolo, Brendan F. Kennedy, et al. "Analysis of image formation in optical coherence elastography using a multiphysics approach." Biomedical Optics Express 5, no. 9 (2014): 2913. http://dx.doi.org/10.1364/boe.5.002913.

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Lad, Yash, Avesh Jangam, Hayden Carlton, et al. "Development of a Treatment Planning Framework for Laser Interstitial Thermal Therapy (LITT)." Cancers 15, no. 18 (2023): 4554. http://dx.doi.org/10.3390/cancers15184554.

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Purpose: Develop a treatment planning framework for neurosurgeons treating high-grade gliomas with LITT to minimize the learning curve and improve tumor thermal dose coverage. Methods: Deidentified patient images were segmented using the image segmentation software Materialize MIMICS©. Segmented images were imported into the commercial finite element analysis (FEA) software COMSOL Multiphysics© to perform bioheat transfer simulations. The laser probe was modeled as a cylindrical object with radius 0.7 mm and length 100 mm, with a constant beam diameter. A modeled laser probe was placed in the

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Geary, Andrew. "Seismic Soundoff." Leading Edge 40, no. 2 (2021): 160. http://dx.doi.org/10.1190/tle40020160.1.

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Lucy MacGregor highlights her 2021 Distinguished Lecture, “Multiphysics analysis: Extracting the most from diverse data sets.” She discusses how combining data sets can compensate for weaknesses in each, how utilizing gravity data improves the seismic image, the biggest obstacle in utilizing data sets, and more. Hear the full episode at https://seg.org/podcast/post/11276 .

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Liu, Jian Jun, and Wan Lin Chen. "Generational Technology of Computational Grid in Porous Media Based on Digital Image." Advanced Materials Research 524-527 (May 2012): 1429–34. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.1429.

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Based on digital imaging processing technology, a generational method of computational grid of porous media is developed for numerical simulation. Transformation of original microscopical image from grayscale into binary one and vector-graph are used for reconstructing a geometric model of porous media. Computational grid of porous media geometry model by COMSOL Multiphysics software can provide an effective way for the latter finite element analysis of porous media.

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Tu, Xiaolei, and Michael S. Zhdanov. "Joint Gramian inversion of geophysical data with different resolution capabilities: case study in Yellowstone." Geophysical Journal International 226, no. 2 (2021): 1058–85. http://dx.doi.org/10.1093/gji/ggab131.

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SUMMARY Joint inversion of multiphysics data is a practical approach to the integration of geophysical data, which produces models of reduced uncertainty and improved resolution. The development of effective methods of joint inversion requires considering different resolutions of different geophysical methods. This paper presents a new framework of joint inversion of multiphysics data, which is based on a novel formulation of Gramian constraints and mitigates the difference in resolution capabilities of different geophysical methods. Our approach enforces structural similarity between differen

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Ciou, Yong Jie, Yean Ren Hwang, and Jing Chie Lin. "Theoretical Modeling and Fabrication of Two-Dimensional Microstructures by Using Micro-Anode-Guided Electroplating with Real-Time Image Processing." Key Engineering Materials 656-657 (July 2015): 604–14. http://dx.doi.org/10.4028/www.scientific.net/kem.656-657.604.

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the purpose of this research was to develop a new micro-anode-guided electroplating (MAGE) system equipped by an image-guided positioning controller, to fabricate two-dimensional microstructures. From real-time image, the relative positions of the micro-anode and the microstructures tip can be located and maintained. When the relative position is adjusted, the deposition direction of the microstructures can be controllable and microstructures with different geometries can be fabricated. Moreover, the results of experiment can be explained by the distribution of electro field strength simulated

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Aleksanyan, Grayr, Nikolay Gorbatenko, Maria Konko, and Cuong Nguyen Manh. "Computer model for acquisition, processing, analysis and visualization of measurement data by electrical impedance tomography." E3S Web of Conferences 389 (2023): 07009. http://dx.doi.org/10.1051/e3sconf/202338907009.

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In this article, a computer model for the collection, processing, analysis and visualization of measurement data by the method of electrical impedance tomography has been developed. The essence of the work performed is to build a computer model of the phantom, electrodes, conductive medium and inhomogeneities in the COMSOL Multiphysics environment to study the conductivity of objects in order to reduce the error in determining the size of the inhomogeneity in the reconstructed image. The study is performed by placing an inhomogeneity phantom in the conductive region. Based on the data obtained

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Ye, Zhijun, Yi Chen, Chao Yang, et al. "The Mechanism of Droplet Thermocapillary Migration Coupled with Multi-Physical Fields." Symmetry 15, no. 11 (2023): 2069. http://dx.doi.org/10.3390/sym15112069.

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In this paper, the coupling effect of multiphysical fields of droplet migration is deeply studied by constructing a physical model of droplet migration with multiphysical fields. Digital holographic interferometry and particle image velocimetry are used to simultaneously measure the temperature and velocity fields of the mother liquor in the process of droplet migration for the first time. Due to the advancements of measuring, the zero-velocity region is also in the region where the thermal wake appears, four vortexes appear in the droplet migration and the off-axis behavior of double-droplet

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Sfarra, Stefano, Clemente Ibarra-Castanedo, Carlo Santulli, Domenica Paoletti, and Xavier Maldague. "Monitoring of jute/hemp fiber hybrid laminates by nondestructive testing techniques." Science and Engineering of Composite Materials 23, no. 3 (2016): 283–300. http://dx.doi.org/10.1515/secm-2013-0138.

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AbstractDamage following static indentation of jute/hemp (50 wt.% total fiber content) hybrid laminates was detected by a number of nondestructive testing (NDT) techniques, in particular, near (NIR) and short-wave (SWIR) infrared reflectography and transmittography, infrared thermography (IRT), digital speckle photography (DSP), and holographic interferometry (HI), to discover and evaluate real defects in a laminate with a complex structure. A comparative study between thermographic data acquired in the mid- (MWIR) and long-wave infrared (LWIR) spectrum bands, by pulsed (PT) and square pulse (

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Shalaby, Noha, Nejib Zemzemi, and Khalil Elkhodary. "Simulating the effect of sodium channel blockage on cardiac electromechanics." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 234, no. 1 (2019): 16–27. http://dx.doi.org/10.1177/0954411919882514.

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There is growing interest to better understand drug-induced cardiovascular complications and to predict undesirable side effects at as early a stage in the drug development process as possible. The purpose of this paper is to investigate computationally the influence of sodium ion channel blockage on cardiac electromechanics. To do so, we implement a myofiber orientation dependent passive stress model (Holzapfel-Ogden) in the multiphysics solver Chaste to simulate an imaged physiological model of the human ventricles. A dosage of a sodium channel blocker was then applied and its inhibitory eff

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Ishak*, Nurfarahin, Chua King Lee, and Siti Zarina Mohd Muji. "A Simulation Magnetic Induction Tomography (MIT) for Agarwood using COMSOL Multiphysics." International Journal of Engineering and Advanced Technology 10, no. 3 (2021): 67–71. http://dx.doi.org/10.35940/ijeat.c2174.0210321.

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Magnetic induction tomography is an imaging technique used to image electromagnetic properties of an object by using the eddy current effect. (MIT) is a non-destructive method that greatly is used in the agriculture industry. This method provided an opportunity to improve the quality of agricultural products. MIT simulation was used for agarwood existence detection. This paper presented for the simulation system contains 7 channel coils receiver and a channel transmitter which is a sensing detector. This experiment aims to demonstrate the reaction of induced current density and magnetic field

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Vishnuram, Pradeep, Sudhanshu Kumar, Vivek Kumar Singh, Thanikanti Sudhakar Babu, Ramani Kannan, and Khairul Nisak Bt Md Hasan. "Phase Shift-Controlled Dual-Frequency Multi-Load Converter with Independent Power Control for Induction Cooking Applications." Sustainability 14, no. 16 (2022): 10278. http://dx.doi.org/10.3390/su141610278.

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Induction heating (IH) applications, assisted with converter topology and their control, have become very attractive in recent years. Independent power control for any induction cooking application with simple converter topology, multi-load handling capacity, and a control technique is still a research hot spot. This paper focuses on developing the dual-frequency converter for delivering power to two loads independently. The switching frequencies of the converter for loads 1 and 2 are selected as 20 and 80 kHz, respectively, and the inverter is operated by multiplexing two switching frequencie

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Solovchuk, Maxim, Tony Wen-Hann Sheu, and Marc Thiriet. "Multiphysics Modeling of Liver Tumor Ablation by High Intensity Focused Ultrasound." Communications in Computational Physics 18, no. 4 (2015): 1050–71. http://dx.doi.org/10.4208/cicp.171214.200715s.

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AbstractHigh intensity focused ultrasound is a rapidly developing technology for the ablation of tumors. Liver cancer is one of the most common malignancies worldwide. Since liver has a large number of blood vessels, blood flow cooling can reduce the necrosed volume and may cause regeneration of the tumor to occur. All cancer cells should be ablated without damaging of the critical tissues. Today, treatment planning tools consider liver as a homogeneous organ. This paper is a step towards the development of surgical planning platform for a non-invasive HIFU tumor ablative therapy in a real liv

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Henke, Christian H., Markus H. Krieger, Kurt Strack, and Andrea Zerilli. "Subsalt imaging in northern Germany using multiphysics (magnetotellurics, gravity, and seismic)." Interpretation 8, no. 4 (2020): SQ15—SQ24. http://dx.doi.org/10.1190/int-2020-0026.1.

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Imaging subsalt is still a challenging task in oil and gas exploration. We have used magnetotellurics (MT) to improve the integration of seismic and gravity data to image the Wedehof salt dome, located in the Northern German Basin. High-density natural field source broadband MT data were acquired and enhanced the definition of the top and overhanging salt structures in addition to imaging the salt dome root. Salt boundaries show strong resistivity contrasts with the surrounding sediments and thus represent a good target for electromagnetic measurements, especially for top salt and salt flanks

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Ahmad, Irfana Kabir, Muhammad Mukhlisin, and Hassan Basri. "Comparisons of Sensor Position for Electrical Capacitance Volume Tomography (Ecvt)." Modern Applied Science 10, no. 4 (2016): 150. http://dx.doi.org/10.5539/mas.v10n4p150.

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<strong><strong></strong></strong><p>Tomography is a technique used to produce true reconstructed images from signal data. This data projection is measured capacitance by numerous sensors located on the surface of the object at different position. Sensitivity matrix with three-dimensional variation, especially in axial (z-axiz) direction are required for imaging a three-dimensional object to differentiate the depth along the sensor length so that the electrical field intensity can be distributed equally all over the three dimension space. In ECVT, when a dielectri

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Avudaiappan, Siva, Supriya Prakatanoju, Mugahed Amran, et al. "Experimental Investigation and Image Processing to Predict the Properties of Concrete with the Addition of Nano Silica and Rice Husk Ash." Crystals 11, no. 10 (2021): 1230. http://dx.doi.org/10.3390/cryst11101230.

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The use of the combination of ultrafine rice husk ash (RHA) and nano silica (NS) enhances the compactness of hardened concrete, but there is still a lack of studies that address the effects of NS and RHA on the workability, mechanical properties and pore microstructure of concrete. This study mainly aims to investigate the influence of the pore size distribution in multiphysics concrete model modified by NS and RHA and to determine the workability and mechanical properties of concrete with NS and RHA. In this work, NS and RHA were used as 0, 5, 10, 15 and 20% replacements of ordinary Portland

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Janicijevic, Milovan, Milesa Sreckovic, Branka Kaludjerovic, et al. "Evaluation of laser beam interaction with carbon based material - glassy carbon." Chemical Industry and Chemical Engineering Quarterly 21, no. 1-1 (2015): 63–69. http://dx.doi.org/10.2298/ciceq140131006j.

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Laser beam interaction with carbon based material (glassy carbon) is analyzed in this paper. Nd3+:YAG laser beam (1.06?m i.e. near infrared, NIR range) in ms regime with various energy densities is used. In all experiments, provided in applied working regimes, the surface damages have occurred. The results of laser damages are analyzed by light and electron scanning (SEM) microscopies. Program Image J is executed for quantitative analysis of generated damages based on micrographs obtained by light and SEM microscopes. Temperature distribution in exposed samples is evaluated by numerical simula

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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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Handayani, Nita, Kharisma Fajar H, Freddy Haryanto, Siti Nurul K, Marlin R. Baidillah, and Warsito P. Taruno. "Simulasi Rekonstruksi Citra Pada Sensor Brain ECVT (Electrical Capacitance Volume Tomography) dengan Metode ILBP (Iterative Linear Back Projection)." INDONESIAN JOURNAL OF APPLIED PHYSICS 6, no. 02 (2017): 107. http://dx.doi.org/10.13057/ijap.v6i02.1480.

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<p>The purpose of this study is to simulate the sensor 32-channel Brain ECVT image reconstruction using ILBP (Iterative Linear Back Projection) methods. ECVT is a dynamic volume imaging technique that utilizes non-linear difference of electric field distribution to determine the distribution of permittivity in the sensing area. ECVT has measured the capacitance of data as a result of changes in the permittivity distribution between the electrode pairs. ECVT device consists of three main parts: helmet-shaped sensors, DAS (Data Acquisition System), PC for display and image reconstruction p

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Zhan, Zhigang, Hao Song, Xiaoxiang Yang, et al. "Microstructure Reconstruction and Multiphysics Dynamic Distribution Simulation of the Catalyst Layer in PEMFC." Membranes 12, no. 10 (2022): 1001. http://dx.doi.org/10.3390/membranes12101001.

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Due to the complexity of both material composition and the structure of the catalyst layer (CL) used in the proton-exchange membrane fuel cell (PEMFC), conjugated heat and mass transfer as well as electrochemical processes simultaneously occur through the CL. In this study, a microstructure model of CL was first reconstructed using images acquired by Nano-computed tomography (Nano-CT) of a real sample of CL. Then, the multiphysics dynamic distribution (MPDD) simulation, which is inherently a multiscale approach made of a combination of pore-scale and homogeneous models, was conducted on the re

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Cunha, Cristina, Catarina Monteiro, António Vaz, Susana Silva, Orlando Frazão, and Susana Novais. "Enhanced Sensitivity in Optical Sensors through Self-Image Theory and Graphene Oxide Coating." Sensors 24, no. 3 (2024): 891. http://dx.doi.org/10.3390/s24030891.

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This paper presents an approach to enhancing sensitivity in optical sensors by integrating self-image theory and graphene oxide coating. The sensor is specifically engineered to quantitatively assess glucose concentrations in aqueous solutions that simulate the spectrum of glucose levels typically encountered in human saliva. Prior to sensor fabrication, the theoretical self-image points were rigorously validated using Multiphysics COMSOL 6.0 software. Subsequently, the sensor was fabricated to a length corresponding to the second self-image point (29.12 mm) and coated with an 80 µm/mL graphen

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Furlan, Rogerio, Joel A. M. Rosado, and Ana Neilde Rodrigues Da Silva. "Formation of Oriented Fibers Using Injection of PEO Solutions inside Electric Fields Defined by Two Parallel Suspended Electrodes." Journal of Integrated Circuits and Systems 6, no. 2 (2011): 122–26. http://dx.doi.org/10.29292/jics.v6i2.348.

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Formation of oriented fibers using injection of polyethylene oxide (PEO) solutions inside electric fields defined by two parallel suspended electrodes is investigated. Images of streams formed with the injection of a large amount of polymeric solution reveal good agreement with electric field distributions obtained with numerical simulation (COMSOL Multiphysics) when appropriate boundary conditions are defined. Oriented fibers with diameters in the range of hundreds of nanometers to micrometers result connected between electrodes (separated by several centimeters) and can be easily collected/t

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Daniel, Jackson, A. Abudhahir, and J. Janet Paulin. "Tsallis Entropy Segmentation and Shape Feature-based Classification of Defects in the Simulated Magnetic Flux Leakage Images of Steam Generator Tubes." International Journal of Pattern Recognition and Artificial Intelligence 34, no. 01 (2019): 2054002. http://dx.doi.org/10.1142/s0218001420540026.

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Early detection of water or steam leaks into sodium in the steam generator units of nuclear reactors is an important requirement from safety and economic considerations. Automated defect detection and classification algorithm for categorizing the defects in the steam generator tube (SGT) of nuclear power plants using magnetic flux leakage (MFL) technique has been developed. MFL detection is one of the most prevalent methods of pipeline inspection. Comsol 4.3a, a multiphysics modeling software has been used to obtain the simulated MFL defect images. Different thresholding methods are applied to

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Song, Rui, Mengmeng Cui, Jianjun Liu, P. G. Ranjith, and Yun Lei. "A Pore-Scale Simulation on Thermal-Hydromechanical Coupling Mechanism of Rock." Geofluids 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/7510527.

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Thermal-hydromechanical (THM) coupling process is a key issue in geotechnical engineering emphasized by many scholars. Most existing studies are conducted at macroscale or mesoscale. This paper presents a pore-scale THM coupling study of the immiscible two-phase flow in the perfect-plastic rock. Assembled rock matrix and pore space models are reconstructed using micro-CT image. The rock deformation and fluid flow are simulated using ANSYS and CFX software, respectively, in which process the coupled physical parameters will be exchanged by ANSYS multiphysics platform at the end of each iteratio

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Hua, Chengjian, Yanping Bao, and Min Wang. "Multiphysics Numerical Simulation Model and Hydraulic Model Experiments in the Argon-Stirred Ladle." Processes 10, no. 8 (2022): 1563. http://dx.doi.org/10.3390/pr10081563.

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The argon-stirred ladle is a standard piece of steelmaking refining equipment. The molten steel quality will improve when a good argon-stirred process is applied. In this paper, a Multiphysics model that contained fluid flow, bubble transport, alloy transport, bubble heat flux, alloy heat flux, alloy melting, and an alloy concentration species transport model was established. The fluid model and bubble transport model that were used to calculate the fluid velocity were verified by the hydraulic model of the ladle that was combined with particle image velocimetry measurement results. The numeri

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Gonzalez, Andres, Lawrence Kanyan, Zoya Heidari, and Olivier Lopez. "Integrated Multiphysics Workflow for Automatic Rock Classification and Formation Evaluation Using Multiscale Image Analysis and Conventional Well Logs." Petrophysics – The SPWLA Journal of Formation Evaluation and Reservoir Description 61, no. 5 (2020): 495–518. http://dx.doi.org/10.30632/pjv61n5-2020a7.

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Zulkiflli, N. A., M. D. Shahrulnizahani, X. F. Hor, et al. "Electrical Capacitance Tomography (ECT) Electrode Size Simulation Study for Cultured Cell." Journal of Physics: Conference Series 2071, no. 1 (2021): 012052. http://dx.doi.org/10.1088/1742-6596/2071/1/012052.

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Abstract Cell sensing and monitoring using capacitive sensors are widely used in cell monitoring because of the flexible and uncomplicated design and fabrication. Previous work from many different fields of applications has integrated capacitive sensing technique with tomography to produce cross-sectional images of the internal dielectric distribution. This paper carried an investigation on the capabilities of four 16-channel sensor electrodes with different electrode sizes to detect the change in the dielectric distribution of the cultured cells. All three 16-channel sensor electrodes are des

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Jin, Xinfang, Puvikkarasan Jayapragasam, and Yasser Shoukry. "Multiphysics Modeling for Solid Oxide Electrolyzer Cell with Heterogenous Synthetic Microstructure." ECS Meeting Abstracts MA2023-01, no. 54 (2023): 163. http://dx.doi.org/10.1149/ma2023-0154163mtgabs.

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Solid oxide fuel cell (SOFC) and electrolyzer cell (SOEC) are the main focus for researchers in recent times to diminish greenhouse gas emissions and meet cleaner energy demand, as these devices have highest energy conversion rates and efficiencies [1]. The major hinderance in commercializing SOEC is due to its faster cell degradation under higher current density, compared against its SOFC counterpart. The delamination of oxygen electrode (OE) from the electrolyte (EL) is one of the major causes for the cell degradation [2]. We employed a multi-physics numerical model to understand the electro

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Li, Yan, Ze Yun, Xiang Zhou, and Chuansong Wu. "Fundamental understanding of open keyhole effect in plasma arc welding." Physics of Fluids 35, no. 4 (2023): 043316. http://dx.doi.org/10.1063/5.0144148.

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The keyhole arc welding technique has the advantage of improving welding efficiency by utilizing a stable keyhole mode. Accurate understanding of the keyhole effect is necessary to enhance the welding quality. Due to the high temperature and strong arc force involved, the complex gas–liquid–solid interactions in the complete keyhole process need to be explored. In order to fully demonstrate open keyhole mode welding, a three-tier sandwiched model based on multiphysics and multiphase effects was developed. The top layer of the model is filled with plasma arc, which gradually fuses and penetrate

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Zagubisalo, Peter S., Andrey G. Paulish, and Sergey A. Kuznetsov. "Simulation of thermal processes in metamaterial millimeter-wave to infrared converter for millimeter-wave imager." International Journal of Modeling, Simulation, and Scientific Computing 05, supp01 (2014): 1441009. http://dx.doi.org/10.1142/s1793962314410098.

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The main characteristics of millimeter-wave (MM-wave) image detector were simulated by means of accurate numerical modeling of thermophysical processes in a metamaterial MM-to-IR converter. The converter represents a multilayer structure consisting of an ultra thin resonant metamaterial absorber and a perfect emissive layer. The absorber consists of a dielectric self-supporting film that is metallized from both sides. A micro-pattern is fabricated from one side. Resonant absorption of the MM waves induces the converter heating that yields enhancement of IR emission from the emissive layer. IR

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Yang, Jixin, Pengliang Yu, Suran Wang, and Zheng Sun. "CO2 Storage Monitoring via Time-Lapse Full Waveform Inversion with Automatic Differentiation." Nanomaterials 14, no. 2 (2024): 138. http://dx.doi.org/10.3390/nano14020138.

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In the field of CO2 capture utilization and storage (CCUS), recent advancements in active-source monitoring have significantly enhanced the capabilities of time-lapse acoustical imaging, facilitating continuous capture of detailed physical parameter images from acoustic signals. Central to these advancements is time-lapse full waveform inversion (TLFWI), which is increasingly recognized for its ability to extract high-resolution images from active-source datasets. However, conventional TLFWI methodologies, which are reliant on gradient optimization, face a significant challenge due to the need

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Qiu, Cheng, Anam Abbas, and Feruza Amirkulova. "Pentamode metamaterial design via generative modeling and deep learning." Journal of the Acoustical Society of America 151, no. 4 (2022): A255. http://dx.doi.org/10.1121/10.0011241.

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In this talk, the deep learning-assisted models will be presented for the design of pentamode unit cells to construct a 3-D lattice structure that can mimic the acoustic properties of water. The pentamode models were implemented and modified by altering the properties of the structure during the full-wave simulation performed on COMSOL Multiphysics software to ensure they meet the requirements of specific appliances for manufacture. The design is further improved by the inverse design technique. The implementation of conditional Wasserstein Generative Adversarial Networks with gradient penalty

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Zhang, Yuejin, Mengqiu Ye, Juan Wang, Guanghui Li, Meiling Zhong, and Aiyun Zhan. "Modeling analysis of microenvironment of 3D cell mechanics based on machine vision." Open Physics 20, no. 1 (2022): 117–29. http://dx.doi.org/10.1515/phys-2022-0013.

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Abstract Aiming at the problem of poor construction accuracy of the cellular three-dimensional (3D) mechanical microenvironment, this article studies the cellular 3D mechanical microenvironment based on machine vision. The gelatin methacrylate microgel column was prepared by NIH/3T3 mouse fibroblast and precursor solution of gelatin methacrylate microgel. The gelatin methacrylate microgel array with magnetic end was adopted. The external magnetic field was used to load microgel array and build 3D mechanics microenvironment model. The deformed pictures of hydrogel under magnetic field were obta

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Cooper, L. J., K. R. Daly, P. D. Hallett, et al. "Fluid flow in porous media using image-based modelling to parametrize Richards' equation." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473, no. 2207 (2017): 20170178. http://dx.doi.org/10.1098/rspa.2017.0178.

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The parameters in Richards' equation are usually calculated from experimentally measured values of the soil–water characteristic curve and saturated hydraulic conductivity. The complex pore structures that often occur in porous media complicate such parametrization due to hysteresis between wetting and drying and the effects of tortuosity. Rather than estimate the parameters in Richards' equation from these indirect measurements, image-based modelling is used to investigate the relationship between the pore structure and the parameters. A three-dimensional, X-ray computed tomography image stac

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Soleimani, Hassan, Hassan Ali, Noorhana Yahya, et al. "Dynamics and Geometry Effects on the Capillary Flows in Porous Media for Enhanced Oil Recovery." Defect and Diffusion Forum 413 (December 17, 2021): 77–83. http://dx.doi.org/10.4028/www.scientific.net/ddf.413.77.

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The continuing depletion of light oil supplies and the rapidly growing demand for energy are forcing oil and gas companies to explore unconventional oil extraction techniques. The structure and flow rate implies an impact on the trapping and mobilization of oil in the reservoir. This article studies the effect of pore geometry and dynamics on water-oil displacement as a two-phase flow system. The pore geometries of sandstone were extracted using the non-destructive 3D micro computational tomography (micro-CT) technique. Two-phase flow simulations were performed using COMSOL Multiphysics on the

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Hassanabadi, Massoud, Shahid Akhtar, and Ragnhild E. Aune. "Study and Modelling of Fluid Flow in Ceramic Foam Filters." Materials 16, no. 17 (2023): 5954. http://dx.doi.org/10.3390/ma16175954.

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To investigate the fluid flow characteristics of conventional Ceramic Foam Filters (CFFs) of grades 30 and 50, a 2D macro-scale geometry was generated by converting pixel grid images of the filters into vector format images. The flow behaviour through the filter channels was then numerically modelled using the Stocks equation within the Creeping Flow interface of COMSOL Multiphysics®. Through modelling, the average interstitial velocity was estimated and found to be higher than the corresponding value obtained from the Dupuit–Forchheimer equation. The discrepancy obtained suggested that the fl

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Hanon, Muammel M., Ziad A. Taha, and László Zsidai. "Simulation of laser drilling of Inconel X-750 and Ti-5Al-2.5Sn sheets using COMSOL." Acta Polytechnica 61, no. 4 (2021): 526–36. http://dx.doi.org/10.14311/ap.2021.61.0526.

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The ability of COMSOL Multiphysics 5.2 software to carry out the simulation of laser drilling processes in Inconel X-750 and Ti-5Al-2.5Sn sheets was investigated in this study. A JK 701 pulsed Nd:YAG laser was used for drilling through the entire depth of Inconel X-750 and Ti-5Al-2.5Sn plates of 2 mm and 3 mm thicknesses using laser pulses of a millisecond in time. The laser parameters are varied in different combinations for well-controlled drilling through the entire thickness of the plates. Effects of laser peak power and pulse duration have been determined via the studying of the temperatu

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Xu, Minming, and Yun Ouyang. "Exploration of Flood Prediction in Watersheds Based on the Fusion Analysis of Remote Sensing Big Data with Multiple Physical Fields." Journal of Function Spaces 2022 (July 16, 2022): 1–10. http://dx.doi.org/10.1155/2022/9422553.

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It is well known that flooding brings great losses to people’s production and life, just because it is unsuspected, is extremely extensive, and has high frequency. More than half of the people in China live in flood-prone areas, and their lives and properties are threatened. Flood risk assessment is one of the measures of flood management, and it is economically and socially important to assess flood risk. The scope of the traditional monitoring and forecasting early warning system is mainly limited to the area affected by flash floods, while the objective reality of real-time monitoring, fore

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Kabachek, V. V., N. S. Davydova, M. M. Mezhennaya, and M. V. Davydov. "Anthropomorphic Brain Models Based on Magnetic Resonance Imaging." Digital Transformation 28, no. 2 (2022): 61–69. http://dx.doi.org/10.35596/2522-9613-2022-28-2-61-69.

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The article is devoted to the creation of a method for generating anthropomorphic brain models based on magnetic resonance imaging. The selection of the magnetic field amplitude for transcranial magnetic stimulation (TMS) is carried out through modeling using the finite element method (FEM). These FEM models graphically demonstrate information on the distribution of the magnetic field and, therefore, on the occurring neurophysiological and behavioral changes based on the dose of the TMS, the specific resistance of the head tissue and its anatomy. Thus, these models are an integral tool used to

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Гревцев, А. C., П. А. Золотухин, Э. А. Ильичев, Г. Н. Петрухин, А. В. Попов та Г. С. Рычков. "Расчетная модель приемника тепловых изображений в архитектуре электронно-оптического преобразователя". Журнал технической физики 92, № 4 (2022): 507. http://dx.doi.org/10.21883/jtf.2022.04.52237.270-21.

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An innovative design is considered, and the results of analysis and calculations of the characteristics of a thermal image receiver (3-15 microns), made in the electron-optical converter architecture, are presented. For the sensor-converting pyroelectric unit of the electron-optical converter, the spatial dependences of the electric field strengths and the values of the electric potentials on the spontaneous polarization of the film substance are calculated. Estimates are obtained and the characteristics of thermal-field-induced polarization of various pyroelectric films are discussed. The tem

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Stavropoulou, Eleni, and Lyesse Laloui. "Insights into the interaction of a shale with CO₂." Solid Earth 13, no. 12 (2022): 1823–41. http://dx.doi.org/10.5194/se-13-1823-2022.

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Abstract. Caprock formations, such as shales, play a key role in safe underground CO2 storage since they serve as a hydromechanical barrier that prevents migration of the injected CO2 to the surface. While their hydromechanical response is important to ensure their sealing capacity, interaction with the injected CO2 involves additional thermo–hydro–chemo–mechanical (THCM) phenomena that may threaten the long-term integrity of the caprock. The low-transport properties of shales make them a suitable caprock material, but at the same time challenging to study due to the very long timescales (mont

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