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Journal articles on the topic 'Mesh current method'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Sivakumar, D., and N. Legapriyadharshini. "Smart Mesh Networking City by New Method." Asian Journal of Engineering and Applied Technology 6, no. 1 (2017): 19–22. http://dx.doi.org/10.51983/ajeat-2017.6.1.815.

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Current Trend in Networking is Wireless Mesh Networking (WMN) that makes rural village, a smart city (Mesh City) with their new technical infrastructure and characteristics. Wireless Mesh Networking provide excellent broad band connection to the rural region for making rural smart city. Although several planning is carried for mesh networking using various Protocols, Algorithms in this paper we design a new method with low cost network deployment in rural regions.

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Oh, Sahuck. "A New Mesh Moving Technique for a Fluid–Structure Interaction Problem Using Mesh Deformation Energy Minimization." International Journal of Computational Methods 18, no. 01 (2019): 1950039. http://dx.doi.org/10.1142/s0219876219500397.

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When mesh boundaries move in a simulation because of the motion of a target object such as translation, rotation, and oscillation, the mesh should be regenerated to the points it will obey the locations of its new boundaries. Because recreating new mesh from the beginning is a time-consuming task, new mesh is usually created by deforming an initial mesh, which is called the mesh moving method (or mesh deformation method). In this paper, we present a new mesh moving method that produces a higher quality deformed mesh than the current mesh moving methods. In the proposed method, the deformation

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Saltos-González, Joan, Wilber Saltos-Aráuz, and Hugo Adrián Pico-Mera. "Optimization design of ground grid mesh of 69/13,8 KV substation using ETAP." Sapienza: International Journal of Interdisciplinary Studies 4, no. 3 (2023): e23038. http://dx.doi.org/10.51798/sijis.v4i3.693.

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This scientific document presents the analysis and optimization of the mesh of the grounding system of a 69 / 13.8 kV substation in Ecuador. The mesh is made up of horizontal and vertical conductors connected with vertical electrodes buried under the ground of the substation. The function of the structure is to effectively dissipate the high short-circuit currents generated in the system. The objective is to determine the safety parameters of the ground mesh by comparing the mesh design analysis using the IEEE method and the Finite Element Analysis (FEM) method. These two methods are used diff

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Sayapin, S. N. "Analysis of Current State and Prospects for Development of Methods for Monitoring Tension of Radio-Reflecting Mesh on Deployable Frame of Large Mirror Antenna." Proceedings of Higher Educational Institutions. Маchine Building, no. 2 (731) (February 2021): 41–55. http://dx.doi.org/10.18698/0536-1044-2021-2-41-55.

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The article considers the problems of developing an operating automated method for monitoring the force and uniformity of tension of a radio-reflecting mesh on the deployable frame of large mirror antennas. Based on the performed analysis of known control methods they are classified as contact mechanical methods and non-contact optical ones. It is shown that only optical monitoring methods provide automated control of the tension force of the radio-reflecting mesh on the frame. Among the known optical methods for monitoring, only the moire band method allows creating an immediate picture of th

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Peskin, Charles S. "The immersed boundary method." Acta Numerica 11 (January 2002): 479–517. http://dx.doi.org/10.1017/s0962492902000077.

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This paper is concerned with the mathematical structure of the immersed boundary (IB) method, which is intended for the computer simulation of fluid–structure interaction, especially in biological fluid dynamics. The IB formulation of such problems, derived here from the principle of least action, involves both Eulerian and Lagrangian variables, linked by the Dirac delta function. Spatial discretization of the IB equations is based on a fixed Cartesian mesh for the Eulerian variables, and a moving curvilinear mesh for the Lagrangian variables. The two types of variables are linked by interacti

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Zou, Gui Hong, and Hua Qing Liang. "Finite Element Resistivity Forward Modeling Using Algebraic Multigrid Preconditioned Conjugate Gradient Method." Applied Mechanics and Materials 249-250 (December 2012): 792–97. http://dx.doi.org/10.4028/www.scientific.net/amm.249-250.792.

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An algebraic multigrid by smoothed aggregation preconditioned conjugate gradient method is developed to solve the liner system arising from 3-D direct current finite element resistivity forward modeling. The algorithm combines the efficiency of algebraic multigrid method and the stability of conjugate gradient method. Algebraic multigrid by smoothed aggregation keep in high-efficiency while simulation using local quasi-uniform mesh and its convergence effect will reduce while numerical modeling using anisotropic stretched grids. However tensor product non-equidistant mesh, a kind of anisotropi

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Lester, S., and R. Rada. "A Method of Medical Knowledge Base Augmentation." Methods of Information in Medicine 26, no. 01 (1987): 31–39. http://dx.doi.org/10.1055/s-0038-1635480.

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SummaryThe Medical Subject Headings (MeSH) of the National Library of Medicine may be viewed as a semantic network. The relationships in this semantic network are of a broader-than/narrower-than type. A knowledge base of this type may be augmented by adding new terms and new relationships to the network. The Current Medical Information and Terminology (CMIT) of the American Medical Association represents a rich source of relationships for the disease terms of MeSH. A subset of MeSH was augmented with the knowledge from a subset of CMIT using a matching and similarity strategy. The matching por

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Schöbinger, Markus, Karl Hollaus, and Joachim Schöberl. "An efficient reformulation of a multiscale method for the eddy current problem." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 5 (2017): 1421–29. http://dx.doi.org/10.1108/compel-02-2017-0091.

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Purpose This paper aims to improve the efficiency of a numerical method to treat the eddy current problem on a laminated material, where using a mesh that resolves each individual laminate would be too computationally expensive. Design/methodology/approach The domain is modeled using a coarse mesh that treats the laminated material as a bulk with averaged properties. The fine-structured behavior is recovered by introducing micro-shape functions in the ansatz space. One such method is analyzed to find further model restrictions. Findings By using a special reformulation, it is possible to elimi

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Sobolev, Vladimir Afanas'evich, and Valerii Ivanovich Volchenskov. "ANALYSIS TECHNIQUE OF DIRECT CURRENT ELECTRIC CIRCUITS WITH VOLTAGE AND CURRENT SOURCES BY THE MESH-CURRENT METHOD." Pedagogy. Issues of Theory and Practice, no. 3 (October 2018): 60–66. http://dx.doi.org/10.30853/pedagogy.2018-3.13.

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Grisales-Noreña, Luis Fernando, Oscar Danilo Montoya, Walter Julian Gil-González, Alberto-Jesus Perea-Moreno, and Miguel-Angel Perea-Moreno. "A Comparative Study on Power Flow Methods for Direct-Current Networks Considering Processing Time and Numerical Convergence Errors." Electronics 9, no. 12 (2020): 2062. http://dx.doi.org/10.3390/electronics9122062.

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This study analyzes the numerical convergence and processing time required by several classical and new solution methods proposed in the literature to solve the power-flow problem (PF) in direct-current (DC) networks considering radial and mesh topologies. Three classical numerical methods were studied: Gauss–Jacobi, Gauss–Seidel, and Newton–Raphson. In addition, two unconventional methods were selected. They are iterative and allow solving the DC PF in radial and mesh configurations. The first method uses a Taylor series expansion and a set of decoupling equations to linearize around the desi

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Peng, Biao, Chunhua Zhou, and Junqiang Ai. "Solution Reconstruction on Unstructured Tetrahedral Meshes Using P1-Conservative Interpolation." Advances in Applied Mathematics and Mechanics 8, no. 5 (2016): 847–70. http://dx.doi.org/10.4208/aamm.2015.m1087.

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AbstractThis paper extends an algorithm of P1-conservative interpolation on triangular meshes to tetrahedral meshes and thus constructs an approach of solution reconstruction for three-dimensional problems. The conservation property is achieved by local mesh intersection and the mass of a tetrahedron of the current mesh is calculated by the integral on its intersection with the background mesh. For each current tetrahedron, the overlapped background tetrahedrons are detected efficiently. A mesh intersection algorithm is proposed to construct the intersection of a current tetrahedron with the o

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Gou, Jinlan, Xin Yuan, and Xinrong Su. "Adaptive mesh refinement method based investigation of the interaction between shock wave, boundary layer, and tip vortex in a transonic compressor." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, no. 4 (2017): 694–715. http://dx.doi.org/10.1177/0954410016687142.

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Shock wave and tip leakage are important flow features at small length scales. These flow phenomena and their interactions play important roles in the performance of modern transonic fans and compressors. In most numerical predictions of these features, mesh convergence studies are conducted using overall performance data as criteria. However, less effort is made in assessing the quality of the predicted small-scale features using a mesh that yields a fairly accurate overall performance. In this work, this problem is addressed using the adaptive mesh refinement (AMR) method, which automaticall

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Tsvetkova, Valeriia Olegovna. "Turbulent flow simulation near fixed drone propeller using immersed boundary method." Keldysh Institute Preprints, no. 56 (2022): 1–24. http://dx.doi.org/10.20948/prepr-2022-56.

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Current paper investigates the possibility of modeling the flow near the drone propeller on a simply connected mesh using the immersed boundary method and calculating its aerodynamic characteristics. An important part of the technique is the moving mesh adaptation to the surface of a streamlined body that retains its topology. The position and shape of the body are given by an interpolation grid, which stores the function of the distance to the body surface, as well as a number of geometry parameters. The method described in this paper is usually used to simulate flow near moving bodies, but h

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Qiu, Yu Liang, Xiao Yong Hu, Zhu Wang, and Zhang Jun Wang. "Automatic FLAC3D Mesh Generation Based on Advancing-Frontal Method." Advanced Materials Research 255-260 (May 2011): 1862–66. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.1862.

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For the disadvantage in modeling at complex areas, advancing-frontal triangulation method was firstly applied in building numerical model of FLAC3D software. Suitable date structure and algorithm based on Fish program language was mainly studied. The position criterion of adjacent edges to current edge is brought in to improve the efficiency of algorithm; equilateral triangle or isosceles triangle mesh is generated to improve elements’ quality; element size is controlled by simple mathematics means so smooth graded triangular mesh is constructed. Through the research, the first independent FLA

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Li, Jin, Yunlin Xu, Dean Wang, Qicang Shen, Brendan Kochunas, and Thomas Downar. "DEMONSTRATION OF A LINEAR PROLONGATION CMFD METHOD ON MOC." EPJ Web of Conferences 247 (2021): 03006. http://dx.doi.org/10.1051/epjconf/202124703006.

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Coarse Mesh Finite Difference (CMFD) method is a very effective method to accelerate the iterations for neutron transport calculation. But it can degrade and even fail when the optical thickness of the mesh becomes large. Therefore several methods, including partial current-based CMFD (pCMFD) and optimally diffusive CMFD (odCMFD), have been proposed to stabilize the conventional CMFD method. Recently, a category of “higherorder” prolongation CMFD (hpCMFD) methods was proposed to use both the local and neighboring coarse mesh fluxes to update the fine cell flux, which can solve the fine cell sc

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Ren, Zhengyong, and Jingtian Tang. "3D direct current resistivity modeling with unstructured mesh by adaptive finite-element method." GEOPHYSICS 75, no. 1 (2010): H7—H17. http://dx.doi.org/10.1190/1.3298690.

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A new adaptive finite-element method for solving 3D direct-current resistivity modeling problems is presented. The method begins with an initial coarse mesh, which is then adaptively refined wherever a gradient-recovery-based a posteriori error estimator indicates that refinement is necessary. Then the problem is solved again on the new grid. The alternating solution and refinement steps continue until a given error criterion is satisfied. The method is demonstrated on two synthetic resistivity models with known analytical solutions, so the errors can be quantified. The applicability of the nu

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Reyes, Clint Chester, Eric Cruz, and Jose Carlo Eric Santos. "CASE STUDY OF NEARSHORE CURRENTS HAZARD ANALYSIS FOR RECREATIONAL BEACH DEVELOPMENT." Coastal Engineering Proceedings, no. 36v (December 31, 2020): 20. http://dx.doi.org/10.9753/icce.v36v.papers.20.

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Nearshore current generation at two coastlines contemplated for beach resort development is studied with the use of a numerical model for coexisting waves and currents. A nested-mesh technique was applied to consolidate the 2 domains of coarse and fine bathymetric data and to translate deep water wave conditions at the nearshore mesh boundary. The hydrodynamic model is validated using tide data at the nearest tide stations, while offshore wave conditions, determined from a wave hindcasting method, are inputted as quasi-stationary forcing. Simulations results of wave-current co-existing fields

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Smith, Jonathan, Samuel Hall, George Coombs, et al. "Path-Planning on a Spherical Surface with Disturbances and Exclusion Zones." Journal of Artificial Intelligence Research 82 (March 28, 2025): 1845–907. https://doi.org/10.1613/jair.1.16746.

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An algorithm is presented for path-planning in a non-uniform spheroid mesh containing exclusion zones, vector and scalar fields. The mesh models physical environments such as ocean regions, together with a variety of environmental phenomena such as wind, current and ice conditions which impact on routing decisions. The path-planning method can be used to optimise the travel time of journeys between points in the mesh. We provide the algorithmic details and the mathematical foundations of the algorithms. To demonstrate that the method has basic desirable properties, we show that long paths in u

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Zhou, Xu, Tang, et al. "Identifying the Design Alternatives and Flow Interference of Tuna Purse Seine by the Numerical Modelling Approach." Journal of Marine Science and Engineering 7, no. 11 (2019): 405. http://dx.doi.org/10.3390/jmse7110405.

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Dynamic responses of tuna purse seine to currents were numerically studied with regard to the vertical subsidence and global load distribution, and determinant attributes were identified. We rebuilt the submerged geometry of a purse seine net using the lumped mass method with hydrodynamic coefficients obtained from measurements of the prototype material, as well as a mesh grouping method, which corrects the twine diameter and netting material density for the equivalent net by introducing the compensation coefficient. Uneven tension distribution showed that it was vulnerable to high loads in th

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Pourkeivannour, Siamak, Joost S. B. van Zwieten, Léo A. J. Friedrich, Mitrofan Curti, and Elena A. Lomonova. "A Comparative Study of Finite Element Method and Hybrid Finite Element Method–Spectral Element Method Approaches Applied to Medium-Frequency Transformers with Foil Windings." J 6, no. 4 (2023): 627–38. http://dx.doi.org/10.3390/j6040041.

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This study aims to improve the computational efficiency of the frequency domain analysis of medium-frequency transformers (MFTs) with the presence of large clearance distances and fine foil windings. The winding loss and magnetic energy in MFTs in the medium-frequency range are calculated utilizing a finite element method (FEM) using common triangular and alternative rectilinear mesh elements. Additionally, in order to improve the computational efficiency of the calculations, a spectral element method (SEM) is coupled with a FEM, thus creating a hybrid FEM–SEM formulation. In such a hybrid app

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Turlakiewicz, Karolina, Michał Puchalski, Izabella Krucińska, and Witold Sujka. "The Role of Mesh Implants in Surgical Treatment of Parastomal Hernia." Materials 14, no. 5 (2021): 1062. http://dx.doi.org/10.3390/ma14051062.

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A parastomal hernia is a common complication following stoma surgery. Due to the large number of hernial relapses and other complications, such as infections, adhesion to the intestines, or the formation of adhesions, the treatment of hernias is still a surgical challenge. The current standard for the preventive and causal treatment of parastomal hernias is to perform a procedure with the use of a mesh implant. Researchers are currently focusing on the analysis of many relevant options, including the type of mesh (synthetic, composite, or biological), the available surgical techniques (Sugarba

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Issa, Mohammad, Jean-René Poirier, Ronan Perrussel, Olivier Chadebec, and Victor Péron. "Boundary element method for 3D conductive thin layer in eddy current problems." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 2 (2019): 502–21. http://dx.doi.org/10.1108/compel-09-2018-0348.

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Purpose Thin conducting sheets are used in many electric and electronic devices. Solving numerically the eddy current problems in presence of these thin conductive sheets requires a very fine mesh which leads to a large system of equations, and it becomes more problematic in case of higher frequencies. The purpose of this paper is to show the numerical pertinence of equivalent models for 3D eddy current problems with a conductive thin layer of small thickness e based on the replacement of the thin layer by its mid-surface with equivalent transmission conditions that satisfy the shielding purpo

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Akhikpemelo, A. "Optimal design analysis of substation ground grid mesh." Nigerian Journal of Technology 42, no. 2 (2023): 274–81. http://dx.doi.org/10.4314/njt.v42i2.16.

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Substations are grounded by means of earth-embedded electrodes in order to provide safety during normal or fault conditions. Electric substations are effectively grounded to guarantee the proper operation of electrical devices, minimize the likelihood of flash-over during transient conditions as well as dispel lightning strokes. A structure is termed grounded if it is electrically bonded to earth-embedded metallic frames. The earth-embedded metallic frames provide a conducting pathway of electricity to the earth and it is called a ground grid system. Substation ground grid mesh is comprised of

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Shahriar, Adnan, and Ahmed Jenan Mostafa. "A p-Refinement Method Based on a Library of Transition Elements for 3D Finite Element Applications." Mathematics 11, no. 24 (2023): 4954. http://dx.doi.org/10.3390/math11244954.

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Wave propagation or acoustic emission waves caused by impact load can be simulated using the finite element (FE) method with a refined high-fidelity mesh near the impact location. This paper presents a method to refine a 3D finite element mesh by increasing the polynomial order near the impact location. Transition elements are required for such a refinement operation. Three protocols are defined to implement the transition elements within the low-order FE mesh. Due to the difficulty of formulating shape functions and verification, there are no transition elements beyond order two in the curren

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Wang, Yongliang, Guofeng Zhang, Shulin Zhang, Yong Wang, and Xiaoming Xie. "Analysis and Simulation of Multi-Loop SQUID-Based Electric Circuits With Mesh-Current Method." IEEE Transactions on Applied Superconductivity 30, no. 8 (2020): 1–9. http://dx.doi.org/10.1109/tasc.2020.3024008.

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Kim, Sungjin, and Chang Ha Lee. "Mesh Clustering and Reordering Based on Normal Locality for Efficient Rendering." Symmetry 14, no. 3 (2022): 466. http://dx.doi.org/10.3390/sym14030466.

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Recently, the size of models for real-time rendering has been significantly increasing for realism, and many graphics applications are being developed in mobile devices with relatively insufficient hardware power. Therefore, improving rendering speed is still important in graphics. Back-face culling is one of the core speed-up techniques to remove the back-facing polygons that are not drawn in the result image. In this paper, we present a mesh clustering and reordering method based on normal coherence for efficient back-face culling at an earlier stage than the current method, which removes ba

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Huang, Hui, and Hidekazu Murakawa. "A Selective Integration-Based Adaptive Mesh Refinement Approach for Accurate and Efficient Welding Process Simulation." Journal of Manufacturing and Materials Processing 7, no. 6 (2023): 206. http://dx.doi.org/10.3390/jmmp7060206.

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To save computational time and physical memory in welding thermo-mechanical analysis, an accurate adaptive mesh refinement (AMR) method was proposed based on the feature of moving heat source during the welding. The locally refined mesh was generated automatically according to the position of the heat source to solve the displacement field. A background mesh, without forming a global matrix, was designed to maintain the accuracy of stress and strain after mesh coarsening. The solutions are always carried out on the refined computational mesh using a selective integration scheme. To evaluate th

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Peraza Hernandez, E. A., D. J. Hartl, and D. C. Lagoudas. "Design and simulation of origami structures with smooth folds." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473, no. 2200 (2017): 20160716. http://dx.doi.org/10.1098/rspa.2016.0716.

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Origami has enabled new approaches to the fabrication and functionality of multiple structures. Current methods for origami design are restricted to the idealization of folds as creases of zeroth-order geometric continuity. Such an idealization is not proper for origami structures of non-negligible fold thickness or maximum curvature at the folds restricted by material limitations. For such structures, folds are not properly represented as creases but rather as bent regions of higher-order geometric continuity. Such fold regions of arbitrary order of continuity are termed as smooth folds . Thi

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Tatarinova, Oksana Andriivna, and Dmytro Vasylovych Breslavsky. "Method and software for finite element solution of two-dimensional creep problems at large deformations." Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, no. 1 (December 31, 2021): 3–9. http://dx.doi.org/10.20998/2078-9130.2021.1.239202.

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The paper presents the formulation of a two-dimensional problem of the creep theory for the case of finite strains. A description of the foundations of the calculation method presents. The method is based on the use of the generalized Lagrange-Euler (ALE) approach, in which the boundary value problem in the current solid configuration is solved by using FEM. A triangular element is involved in the numerical modeling. At each stage of creep calculations in the current configuration, the initial problem is solved numerically using the finite difference method. The preprocessing data preparation

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Sun, Peng, Tonglin Li, Rongzhe Zhang, et al. "Joint Inversion of DC Resistivity and Gravity Data with Undulating Terrain Based on Deformed Hexahedral Mesh." Minerals 14, no. 10 (2024): 1012. http://dx.doi.org/10.3390/min14101012.

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In the field of mineral resource exploration, accurate imaging of subsurface structures is key to discovering and assessing potential mineral deposits. Traditional single geophysical methods, limited by terrain variations and their own constraints, can lead to divergent solutions and structural inconsistencies, affecting the reliability of exploration outcomes. To address these challenges, this paper presents a joint inversion method for three-dimensional direct current (DC) resistivity and gravity data based on a deformed hexahedral mesh. The article begins by outlining the current state of d

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Kim, Hyea Hyun, Atul S. Minhas, and Eung Je Woo. "An Iterative Method for Problems with Multiscale Conductivity." Computational and Mathematical Methods in Medicine 2012 (2012): 1–12. http://dx.doi.org/10.1155/2012/893040.

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A model with its conductivity varying highly across a very thin layer will be considered. It is related to a stable phantom model, which is invented to generate a certain apparent conductivity inside a region surrounded by a thin cylinder with holes. The thin cylinder is an insulator and both inside and outside the thin cylinderare filled with the same saline. The injected current can enter only through the holes adopted to the thin cylinder. The model has a high contrast of conductivity discontinuity across the thin cylinder and the thickness of the layer and the size of holes are very small

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Li, Hanhui, Xiaojian Lin, Xuan Huang, Zejun Yang, Zhisheng Wang, and Xiaodan Liang. "Monocular 3D Hand Mesh Recovery via Dual Noise Estimation." Proceedings of the AAAI Conference on Artificial Intelligence 38, no. 4 (2024): 3046–54. http://dx.doi.org/10.1609/aaai.v38i4.28087.

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Current parametric models have made notable progress in 3D hand pose and shape estimation. However, due to the fixed hand topology and complex hand poses, current models are hard to generate meshes that are aligned with the image well. To tackle this issue, we introduce a dual noise estimation method in this paper. Given a single-view image as input, we first adopt a baseline parametric regressor to obtain the coarse hand meshes. We assume the mesh vertices and their image-plane projections are noisy, and can be associated in a unified probabilistic model. We then learn the distributions of no

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Kong, Liang, and Heng Nian. "Parameters Selection Method of Circuit Breaker and Fault Current Limiter in Mesh-Type DC Microgrid." IEEE Access 9 (2021): 35514–23. http://dx.doi.org/10.1109/access.2021.3061117.

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Arehpanahi, Mehdi, and Reza Namdar. "A modified mesh refinement procedure for 2D magnetic field analysis using surface current method (SCM)." International Journal of Applied Electromagnetics and Mechanics 49, no. 3 (2015): 337–45. http://dx.doi.org/10.3233/jae-140137.

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Ota, Tomohiro, Yoshihiro Kawase, Katsuhiro Hirata, and Yoshio Mitsutake. "3-D Eddy Current Analysis of Linear Solenoid Using A New Auto Mesh Coupling Method." IEEJ Transactions on Industry Applications 119, no. 11 (1999): 1393–400. http://dx.doi.org/10.1541/ieejias.119.1393.

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Zhang, Qian-Jiang, Shi-Kun Dai, Long-Wei Chen, Jian-Ke Qiang, Kun Li, and Dong-Dong Zhao. "Finite element numerical simulation of 2.5D direct current method based on mesh refinement and recoarsement." Applied Geophysics 13, no. 2 (2016): 257–66. http://dx.doi.org/10.1007/s11770-016-0562-0.

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Zhang, X., N. M. Sudharsan, R. Ajaykumar, and K. Kumar. "Simulation of free-surface flow in a tank using the Navier-Stokes model and unstructured finite volume method." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 219, no. 3 (2005): 251–66. http://dx.doi.org/10.1243/095440605x8496.

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Modelling free-surface flow has very important applications in many engineering areas such as oil transportation and offshore structures. Current research focuses on the modelling of free surface flow in a tank by solving the Navier-Stokes equation. An unstructured finite volume method is used to discretize the governing equations. The free surface is tracked by dynamically adapting the mesh and making it always surface conforming. A mesh-smoothing scheme based on the spring analogy is also implemented to ensure mesh quality throughout the computaiton. Studies are performed on the sloshing res

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Coe, Michael, and Stefanie Gutschmidt. "IKA-FLOW : A Flexible Body Overset Mesh Implementation for Fish Swimming." OpenFOAM® Journal 3 (July 6, 2023): 75–119. http://dx.doi.org/10.51560/ofj.v3.89.

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Simulation of inertial aquatic swimmers requires fluid structure interactions with temporal body geometry deformation. In practice, his results in a change of the computational domain boundaries that represent the ”swimmer.” These simulations are traditionally done sing body-fitted mesh and mesh morphing methods, but have drawbacks of negative cell volumes and small time-steps to account for the complex swimming motion. In contrast, the overset mesh method, also provided by OpenFOAM®, overcomes most of the drawbacks of the mesh morphing method at the expense of interpolation error. The current

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Zheng, Yang, Jieyu Zhao, Yu Chen, Chen Tang, and Shushi Yu. "3D Mesh Model Classification with a Capsule Network." Algorithms 14, no. 3 (2021): 99. http://dx.doi.org/10.3390/a14030099.

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With the widespread success of deep learning in the two-dimensional field, how to apply deep learning methods from two-dimensional to three-dimensional field has become a current research hotspot. Among them, the polygon mesh structure in the three-dimensional representation as a complex data structure provides an effective shape approximate representation for the three-dimensional object. Although the traditional method can extract the characteristics of the three-dimensional object through the graphical method, it cannot be applied to more complex objects. However, due to the complexity and

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Lapovok, Andrei Ya, and Roman Ya Nizkiy. "Method of boundary integral equations in magnetostatic damping of thin shells." Transactions of the Krylov State Research Centre 4, no. 394 (2020): 137–42. http://dx.doi.org/10.24937/2542-2324-2020-4-394-137-142.

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Object and purpose of research. Calculation of the surface current density needed to compensate magnetic signature of thin ferromagnetic shell. Materials and methods. Numerical methods for boundary integral equations. Main results. Numerical solutions are considered for the densities of the inner and outer current layers which compensate external magnetostatic signature of closed ferromagnetic shells of arbitrary shape. The effect of mesh size and surface magnetism approximation upon the compensation error was investigated on test models. Conclusion. The results of the resear

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Zhang, Yong, Xinyu Zhang, Tao Zhang, and Baocai Yin. "Crowd Motion Editing Based on Mesh Deformation." International Journal of Digital Multimedia Broadcasting 2020 (December 7, 2020): 1–13. http://dx.doi.org/10.1155/2020/3634054.

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Computer simulation is a significant technology on making great scenes of crowd in the film industry. However, current animation making process of crowd motion requires large manual operations which are time-consuming and inconvenient. To solve the above problem, this paper presents an editing method on the basis of mesh deformation that can rapidly and intuitively edit crowd movement trajectories from the perspective of time and space. The method is applied to directly generate and adjust the crowd movement as well as avoid the crash between crowd and obstacles. As for collisions within the c

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Zoric, Josip, and Ivo Roušar. "Calculation of the Primary Current Distribution in Cells with Curved Electrodes Using the Finite Difference, Conservative Scheme, and Finite Element Methods." Collection of Czechoslovak Chemical Communications 61, no. 11 (1996): 1563–84. http://dx.doi.org/10.1135/cccc19961563.

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The primary current distribution was calculated in cells with a curvilinear shape of the electrodes by the finite difference (FDM), the conservative scheme (CS), and the finite element methods (FEM). These methods were used for the solutions of the Laplace equation (LE) for a 2D cross-section of a cell consisting of two concentric cylinders (tubes) as electrodes and the inter-electrode space filled with electrolyte. For this cell the analytical solution of LE is known. The local current density on the approximated shape of the electrodes was calculated. The error in the normalized local curren

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Luchetti, Alessandro, Matteo Zanetti, Denis Kalkofen, and Mariolino De Cecco. "Omnidirectional camera pose estimation and projective texture mapping for photorealistic 3D virtual reality experiences." ACTA IMEKO 11, no. 2 (2022): 1. http://dx.doi.org/10.21014/acta_imeko.v11i2.1127.

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<p class="Abstract">Modern applications in virtual reality require a high level of fruition of the environment as if it was real. In applications that have to deal with real scenarios, it is important to acquire both its three-dimensional (3D) structure and details to enable the users to achieve good immersive experiences. The purpose of this paper is to illustrate a method to obtain a mesh with high quality texture combining a raw 3D mesh model of the environment and 360 <em>°</em> images. The main outcome is a mesh with a high level of photorealistic details. This enables b

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Fuada, Syifaul, Nusaibah Fathul Jannah, Nurfaiz Zarkasyi, and Muhammad Fatih Hady. "Analisis Rangkaian Mesh dengan Aplikasi Android Proto Circuit dan Pembuktiannya dengan Eksperimen Real." Jurnal JEETech 5, no. 1 (2024): 1–13. http://dx.doi.org/10.32492/jeetech.v5i1.5101.

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The existence of current technological developments can affect education in tertiary institutions because there is a simulator that can make it easier for students to understand electrical circuits, and researchers get a simulator, namely the Proto Circuit Android App. This study aims to reveal the differences in the measurement values in the 3-loop mesh circuit. The 3-loop mesh circuit is a method or method used to analyze an electrical circuit which usually consists of several interconnected loops. At the beginning of the practicum using a simulator called Proto Circuit Android App to make a

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Kawase, Yoshihiro, Tadashi Yamaguchi, Yoshiki Iwai, et al. "Numerical analysis of skewed squirrel-cage induction motor taking into account interbar current using 3-D finite element method." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 1 (2017): 378–84. http://dx.doi.org/10.1108/compel-03-2016-0081.

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Purpose The interbar current of a squirrel-cage induction motor (IM) flows in the steel sheets when the secondary conductor is not insulated from the laminated steel sheets. It was reported that the interbar current loss was increased when skewing the rotor core. This paper aims to analyze a skewed IM using the three-dimensional (3D) finite element method. The effects of rotor skew on the interbar current are clarified. Design/methodology/approach In this paper, a skewed squirrel-cage IM is analyzed in three patterns of skewed angle. The calculated results were compared with each other. If all

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Audu, E. E., A. A. Eteng, and I. Uchendu. "Discretization of Continuous Spaces using Barycentric Subdivision Method with Metric Space Constraints on the Nearest Neighbour Edges." Nigerian Journal of Technological Development 21, no. 3 (2024): 78–87. http://dx.doi.org/10.4314/njtd.v21i3.2742.

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The Rao-Wilton-Glisson (RWG) is a commonly used basis function in the numerical solution of the electric field integral equation (EFIE) using the Method of Moments (MoM) and Galerkin approach. This method relies on triangular patches to approximate the surface current. Traditionally, barycentric subdivision of a primary triangle into n-sub-triangles has been used with RWG basis function to solve the EFIE using MoM. This paper presents a method of approximating a surface using triangular patches by sub-dividing a primary triangle into (2n-1) subtriangles. which creates a denser mesh than the wi

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Balaji, V., S. Ravi, and P. Naveen Chandran. "FEM method structural analysis of pressure hull by using hyper mesh." International Journal of Engineering & Technology 7, no. 1.5 (2017): 258. http://dx.doi.org/10.14419/ijet.v7i1.5.9158.

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Pressure hulls are the central load bearing structures of naval submarines, and AUVs ( autonomous underwater vehicles).. A pressure hull is a structure that is designed to resist the compressive forces related with hydrostatic pressure. The most coherent geometries for resisting these compressive forces are annular cross-sections, and thus, pressure hulls are typically composed of a combination of cones and ring-stiffened cylinders, with torispherical domes or spherical at either end. These shells are subject to an external pressure of 65 Bar due to the difference between outside and inside pr

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Jia, Kai, Hongwen Zhang, Liang An, and Yebin Liu. "Delving Deep into Pixel Alignment Feature for Accurate Multi-View Human Mesh Recovery." Proceedings of the AAAI Conference on Artificial Intelligence 37, no. 1 (2023): 989–97. http://dx.doi.org/10.1609/aaai.v37i1.25179.

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Regression-based methods have shown high efficiency and effectiveness for multi-view human mesh recovery. The key components of a typical regressor lie in the feature extraction of input views and the fusion of multi-view features. In this paper, we present Pixel-aligned Feedback Fusion (PaFF) for accurate yet efficient human mesh recovery from multi-view images. PaFF is an iterative regression framework that performs feature extraction and fusion alternately. At each iteration, PaFF extracts pixel-aligned feedback features from each input view according to the reprojection of the current esti

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Chen, Xinhai, Zhichao Wang, Jie Liu, Chunye Gong, and Yufei Pang. "A Neural Network-Based Mesh Quality Indicator for Three-Dimensional Cylinder Modelling." Entropy 24, no. 9 (2022): 1245. http://dx.doi.org/10.3390/e24091245.

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Evaluating mesh quality prior to performing the computational fluid dynamics (CFD) simulation is an essential step to ensure the acceptable accuracy of cylinder modelling. However, traditional mesh quality indicators are often insufficient since they only check geometric information on individual distorted elements. To yield more accurate results, the current evaluation process usually requires careful manual re-evaluation for quality properties such as mesh distribution and local refinement, which heavily increase the meshing overhead. In this paper, we introduce an efficient quality indicato

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Zhao, Wenbo, Yingrui Yu, Xiaoming Chai, et al. "A SIMPLIFIED TWO-NODE COARSE-MESH FINITE DIFFERENCE METHOD FOR PIN-WISE CALCULATION WITH SP3." EPJ Web of Conferences 247 (2021): 02023. http://dx.doi.org/10.1051/epjconf/202124702023.

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For accurate and efficient pin-by-pin core calculation of SP3 equations, a simplified two-node Coarse Mesh Finite Difference (CMFD) method with the nonlinear iterative strategy is proposed. In this study, the two-node method is only used for discretization of Laplace operator of the 0th moment in the first equation, while the fine mesh finite difference (FMFD) is used for the 2nd moment flux and the second equation. In the two-node problem, transverse flux is expanded to second-order Legendre polynomials. In addition, the associated transverse leakage is approximated with flat distribution. Th

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