Relevant bibliographies by topics / Adaptive re-meshing

Academic literature on the topic 'Adaptive re-meshing'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Adaptive re-meshing"

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Sheffer, Alla, and Alper U¨ngo¨r. "Efficient Adaptive Meshing of Parametric Models." Journal of Computing and Information Science in Engineering 1, no. 4 (October 1, 2001): 366–75. http://dx.doi.org/10.1115/1.1429640.

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Parametric modeling is becoming the representation of choice for most modern solid modelers. However, when generating the finite-element mesh of the model for simulation and analysis, most meshing tools ignore the parametric information and use only the boundary representation of the model for meshing. This results in re-meshing the model basically from scratch each time a parametric change is instantiated, which happens numerous times throughout the design process. In this paper we look at ways to use the parametric information during the meshing procedure to prevent unnecessary re-meshing. The paper examines existing meshing techniques developed for other purposes, which can be applied to this problem. It also suggests several new mesh modification techniques specifically designed for efficient mesh adjustment after parametric model changes.
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de With, G., and A. E. Holdø. "The Use of Solution Adaptive Grid for Modeling Small Scale Turbulent Structures." Journal of Fluids Engineering 127, no. 5 (May 12, 2005): 936–44. http://dx.doi.org/10.1115/1.1989359.

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The use of large eddy simulation (LES) is computationally intensive and various studies demonstrated the considerable range of vortex scales to be resolved in an LES type of simulation. The purpose of this study is to investigate the use of a dynamic grid adaptation (DGA) algorithm. Despite many developments related to adaptive methods and adaptive grid strategies, the use of DGA in the context of turbulence modeling is still not well understood, and various profound problems with DGA in relation to turbulence modeling are still present. The work presented in this paper focuses on the numerical modeling of flow around a circular cylinder in the sub-critical flow regime at a Reynolds number of 3.9∙103. LES simulations with conventional mesh and DGA have been performed with various mesh sizes, refinement criteria and re-meshing frequency, to investigate the effects of re-meshing on the flow field prediction. The results indicate that the turbulent flow field is sensitive to modifications in the mesh and re-meshing frequency, and it is suggested that the re-meshing in the unsteady flow region is affecting the onset of small scale flow motions in the free shear layer.
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Menon, Sandeep, Kyle G. Mooney, K. G. Stapf, and David P. Schmidt. "Parallel adaptive simplical re-meshing for deforming domain CFD computations." Journal of Computational Physics 298 (October 2015): 62–78. http://dx.doi.org/10.1016/j.jcp.2015.05.044.

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Na, SeonHong, Eric C. Bryant, and WaiChing Sun. "A configurational force for adaptive re-meshing of gradient-enhanced poromechanics problems with history-dependent variables." Computer Methods in Applied Mechanics and Engineering 357 (December 2019): 112572. http://dx.doi.org/10.1016/j.cma.2019.112572.

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Hartung, Felix, Mario Alejandro Garcia, Thomas Berger, Michael Hindemith, Matthias Wangenheim, and Michael Kaliske. "Experimental and Numerical Investigation of Tire Tread Wear on Block Level." Lubricants 9, no. 12 (November 23, 2021): 113. http://dx.doi.org/10.3390/lubricants9120113.

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Tread wear appears as a consequence of friction, which mainly depends on surface characteristics, contact pressure, slip velocity, temperature and dissipative material properties of the tread material itself. The subsequent description introduces a wear model as a function of the frictional energy rate. A post-processing as well as an adaptive re-meshing algorithm are implemented into a finite element code in order to predict wear loss in terms of mass. The geometry of block models is generated by image processing tools using photographs of the rubber samples in the laboratory. In addition, the worn block shape after the wear test is compared to simulation results.
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Gu, Yuan Tong. "An Adaptive Local Meshfree Updated Lagrangian Approach for Large Deformation Analysis of Metal Forming." Advanced Materials Research 97-101 (March 2010): 2664–67. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.2664.

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The large deformation analysis is one of major challenges in numerical modelling and simulation of metal forming. Because no mesh is used, the meshfree methods show good potential for the large deformation analysis. In this paper, a local meshfree formulation, based on the local weak-forms and the updated Lagrangian (UL) approach, is developed for the large deformation analysis. To fully employ the advantages of meshfree methods, a simple and effective adaptive technique is proposed, and this procedure is much easier than the re-meshing in FEM. Numerical examples of large deformation analysis are presented to demonstrate the effectiveness of the newly developed nonlinear meshfree approach. It has been found that the developed meshfree technique provides a superior performance to the conventional FEM in dealing with large deformation problems for metal forming.
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Wilson, Daniel W., Andrew J. Abbo, Scott W. Sloan, and Kentaro Yamamoto. "Undrained stability of rectangular tunnels where shear strength increases linearly with depth." Canadian Geotechnical Journal 54, no. 4 (April 2017): 469–80. http://dx.doi.org/10.1139/cgj-2016-0072.

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This paper investigates the stability of a plane strain rectangular tunnel under undrained conditions, where the shear strength profile increases linearly with depth. The undrained stability of tunnels for a range of geometries and soil conditions is found using rigid-block upper bound methods as well as finite element limit analysis (FELA). The latter procedures employ a discrete form of the bound theorems of classical plasticity to formulate an optimization problem that is solved using a bespoke conic programming scheme. Rigorous solutions, obtained using adaptive re-meshing of the finite element mesh, generally bracket the true collapse load with upper and lower bound solutions to within 2%. Results from the parametric study are summarized in the form of stability charts.
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Zhang, Yong-Hua, and Jian-Hui He. "Influence of Reciprocal Effect Between Swimming Models and Undulating Fin Morphology on Robotics Propulsion Performance." Journal of Robotics and Mechatronics 24, no. 4 (August 20, 2012): 568–75. http://dx.doi.org/10.20965/jrm.2012.p0568.

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We have previously designed an undulating robotic fin, which is inspired by the pectoral fin of stingray. A CFD-based comparison of optimal thrust and efficiency generation was made among four typical fin undulating swimmingmodels with different amplitude envelopes as well as the fin morphologic. To complement these studies, we consider in this paper the influence of reciprocal effect between swimming models and morphologic on the fin propulsion performance by both CFD and experiments methods. An unstructured, grid-based, unsteady Navier-Stokes solver with automatic adaptive re-meshing is used to compute the unsteady flow around the fin through twenty complete cycles. The pressure distribution on fin surface is computed and integrated to find fin propulsion forces. We conclude from the simulation that the compliance of the distribution mode of fin outline with amplitude envelope can generate the best propulsion performance. An experiment was conducted to verify the simulation results. It is hoped that the work concluded is useful for the optimal design of undulating robotic fins.
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Parkinson, S. D., J. Hill, M. D. Piggott, and P. A. Allison. "Direct numerical simulations of particle-laden density currents with adaptive, discontinuous finite elements." Geoscientific Model Development Discussions 7, no. 3 (May 7, 2014): 3219–64. http://dx.doi.org/10.5194/gmdd-7-3219-2014.

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Abstract. High resolution direct numerical simulations (DNS) are an important tool for the detailed analysis of turbidity current dynamics. Models that resolve the vertical structure and turbulence of the flow are typically based upon the Navier–Stokes equations. Two-dimensional simulations are known to produce unrealistic cohesive vortices that are not representative of the real three-dimensional physics. The effect of this phenomena is particularly apparent in the later stages of flow propagation. The ideal solution to this problem is to run the simulation in three dimensions but this is computationally expensive. This paper presents a novel finite-element (FE) DNS turbidity current model that has been built within Fluidity, an open source, general purpose, computational fluid dynamics code. The model is validated through re-creation of a lock release density current at a Grashof number of 5 × 106 in two, and three-dimensions. Validation of the model considers the flow energy budget, sedimentation rate, head speed, wall normal velocity profiles and the final deposit. Conservation of energy in particular is found to be a good metric for measuring mesh performance in capturing the range of dynamics. FE models scale well over many thousands of processors and do not impose restrictions on domain shape, but they are computationally expensive. Use of discontinuous discretisations and adaptive unstructured meshing technologies, which reduce the required element count by approximately two orders of magnitude, results in high resolution DNS models of turbidity currents at a fraction of the cost of traditional FE models. The benefits of this technique will enable simulation of turbidity currents in complex and large domains where DNS modelling was previously unachievable.
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Mahmoud, Mohamed, François Bay, and Daniel Pino Muñoz. "An Efficient Computational Model for Magnetic Pulse Forming of Thin Structures." Materials 14, no. 24 (December 12, 2021): 7645. http://dx.doi.org/10.3390/ma14247645.

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Electromagnetic forming (EMF) is one of the most popular high-speed forming processes for sheet metals. However, modeling this process in 3D often requires huge computational time since it deals with a strongly coupled multi-physics problem. The numerical tools that are capable of modeling this process rely either on shell elements-based approaches or on full 3D elements-based approaches. The former leads to reduced computational time at the expense of the accuracy, while the latter favors accuracy over computation time. Herein, a novel approach was developed to reduce CPU time while maintaining reasonable accuracy through building upon a 3D finite element analysis toolbox which was developed in CEMEF. This toolbox was used to solve magnetic pulse forming (MPF) of thin sheets. The problem was simulated under different conditions and the results were analyzed in-depth. Innovative techniques, such as developing a termination criterion and using adaptive re-meshing, were devised to overcome the encountered problems. Moreover, a solid shell element was implemented and tested for thin structure problems and its applicability was verified. The results of this element type were comparable to the results of the standard tetrahedral MINI element but with reduced simulation time.
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Conference papers on the topic "Adaptive re-meshing"

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de With, G., and A. E. Holdo̸. "The Use of Solution Adaptive Grid for Modelling Small Scale Turbulent Structures." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56515.

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The use of Large Eddy Simulation (LES) is computationally intensive and various studies demonstrated the considerable range of vortex scales to be resolved in an LES type of simulation. The purpose of this study is to investigate the use of a Dynamic Grid Adaptation (DGA) algorithm. Despite many developments related to adaptive methods and adaptive grid strategies, the use of DGA in the context of turbulence modelling is still not well understood, and various profound problems with DGA in relation to turbulence modelling are still present. The work presented in this paper focuses on the numerical modelling of flow around a circular cylinder in the sub-critical flow regime at a Reynolds number of 3.9·103. LES simulations with conventional mesh and DGA have been performed with various mesh sizes, refinement criteria and re-meshing frequency, to investigate the effects of re-meshing on the flow field prediction. The results indicate that the turbulent flow field is sensitive to modifications in the mesh and re-meshing frequency, and it is suggested that the remeshing in the unsteady flow region is affecting the onset of small scale flow motions in the free shear layer.
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2

Dziedzic, William M., Bruce T. Vu, and Malay G. Shah. "Three-dimensional, Multi-Phase Modeling of a Water Nozzle Injection System Using Adaptive Re-Meshing." In 2018 Fluid Dynamics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-2897.

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Chen, D. J. "Efficient Computation of Strain Energy Release Rate in Crack Growth Simulation." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0505.

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Abstract This paper utilizes an automated process to simplify the calculation of the strain energy release rate (SERR) during the crack propagation. The convergence of a finite element solution is achieved by adaptive re-meshing scheme with an error estimator of the linear strain triangular (LST) elements. As the desired mesh density is achieved, computation of the SERR using virtual crack closure technique (VCCT) can be obtained by using the static condensation scheme without re-analyzing the finite element models. Thus, the amount of computational and modeling time can be significantly reduced in the analysis of the crack propagation.
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Feaster, Jeffrey, Francine Battaglia, Ralf Deiterding, and Javid Bayandor. "Validation of an Adaptive Meshing Implementation of the Lattice-Boltzmann Method for Insect Flight." In ASME 2016 Fluids Engineering Division Summer Meeting collocated with the ASME 2016 Heat Transfer Summer Conference and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fedsm2016-7782.

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Insects, sustaining flight at low Reynolds numbers (500<Re<10,000), fly utilizing mechanically simple kinematics (3 degrees of freedom) at an extremely high flap frequency (150–200 Hz), resulting in a complicated vortical fluid field. These flight characteristics result in some of the most agile and maneuverable flight capabilities in the animal kingdom and are considered to be far superior to fixed wing flight, such as aircraft. Bees are of particular interest because of the utilization of humuli to attach their front and hind wings together during flight. A Cartesian-based adaptive meshing implementation of the Lattice-Boltzmann Method is utilized to resolve the complex flow field generated during insect flight and is verified against experimental and computational results present in the literature in two dimensions. The Lattice-Boltzmann Method was found to agree well in both qualitative and quantitative comparisons with both two-dimensional computational and three-dimensional experimental results.
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Hjiej, Siham, Nikolay Osipov, Adrien Lebrun, Clement Soret, and Yazid Madi. "Evaluation of the Fatigue Crack Growth Behavior by Experiments and Numerical Simulations on Full-Size Pipeline Steels." In 2018 12th International Pipeline Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ipc2018-78495.

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The safety of gas transportation pipelines under fatigue loading remains an important issue. The purpose of the present study is to better evaluate the fatigue crack growth (FCG) behavior by carrying out analysis/predictions and experiments in full-size pipeline steels. A full characterization was made using several samples of an X42 grade pipeline steel, to characterize the monotonic and the fatigue behavior. Fatigue tests on full-scale pipeline steels under pressure loading were performed. The potential drop (PD) method applied to pressurized pipes makes it possible to monitor and quantify both crack initiation and crack propagation. These tests served as a basis for numerical comparison. Crack propagation of the full-size pipeline steel was simulated by finit element analysis (FEA) using an adaptive re-meshing approach implemented as part of the Z-set/Zebulon software. Simulation allows predicting fatigue crack growth life on pipes using results of tests on specimens as an input.
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McClung, R. Craig, Paul Wawrzynek, Yi-Der Lee, Bruce J. Carter, Jonathan P. Moody, and Michael P. Enright. "An Integrated Software Tool for High Fidelity Probabilistic Assessments of Metallic Aero-Engine Components." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57877.

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Most current tools and methodologies to predict the life and reliability of fracture critical gas turbine engine components rely on stress intensity factor solutions that assume highly idealized component and crack geometries, and this can lead to highly conservative results in some cases. This paper describes a new integrated methodology to perform these assessments that combines one software tool for creating high fidelity crack growth simulations (FRANC3D) with another software tool for performing probabilistic fatigue crack growth life assessments of turbine engine components (DARWIN). DARWIN employs finite element models of component stresses, while FRANC3D performs automatic adaptive re-meshing of these models to simulate crack growth. Modifications have been performed to both codes to allow them to share and exchange data and to enhance their shared computational capabilities. Most notably, a new methodology was developed to predict the shape evolution and the fatigue lifetime for cracks that are geometrically complex and not easily parameterized by a small number of degrees of freedom. This paper describes the integrated software system and the typical combined work flow, and it shows the results from a number of analyses that demonstrate the significant features of the system.
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Klaus, Matthias, Stefan Holtzhausen, Christine Schöne, and Ralph Stelzer. "Topology-Oriented Deformation of FE-Meshes in Iterative Reverse Engineering Processes." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82994.

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Reverse Engineering methods are becoming more and more important in product development processes in cases without CAD models or modified physical objects. For numerical calculations of scanned components, using, for instance, the Finite Element Method (FEM) to look at strength or vibration characteristics, we need the previously scanned data, obtained via Geometric Reverse Engineering, to be converted into CAD surface data, a Finite Element-meshing and a determination of material parameters and constraints. Tremendous effort must be expended in the course of performing repeated Geometric Reverse Engineering and FE-meshing, which must be done when there are iterative, largely local changes in real geometry (such as when incorporating forming dies) or in the case of topologically similar objects, which must be scanned again and again. This project is aimed at the generation of new calculation models using an appropriate adaption of existing FE meshes (made using a CAD model, for example) or FE meshes previously created with the help of scan data through the retention of intelligent meshing (constraints, material, element type etc.). In terms of their topology, these new meshes should adapt themselves to changes in geometry. Time-consuming Geometric Reverse Engineering, as well as re-meshing, can thus be bypassed. Product development cycles frequently proceed in an iterative manner. Repetition of process steps is intended to improve the product in order to achieve an optimum result in design and dimensioning. The goal of these research activities is to reduce the process steps from 3D scan data to FE-meshing, in particular in development cycles. The paper introduces the project’s concept, its initial results, and further steps.
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