Hexahedral Mesh Generation for Computational Materials Modeling

Owen, Steven J.; Brown, Judith A.; Ernst, Corey; Lim, Hojun; Long, Kevin Nicholas

doi:10.1016/j.proeng.2017.09.803

Cited by 31 publications

(12 citation statements)

References 8 publications

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“…Keywords Compression · Corner point grid · Discrete wavelet transform · Geometrical discontinuities · Hexahedral volume meshes · High-Performance Computing · Multiscale methods · Simulation · Upscaling 1 Introduction Simulation sciences and scientific modelling in highperformance computing employ meshes with increasing precision and dynamics. Among them, hexahedral arXiv:1903.07614v2 [cs.GR] 4 May 2019 meshes are commonly handled in biomedical engineering [28], computational materials science [39] and in geosciences. They are for instance used by geologists to study flow simulations for reservoir modelling [7], and benefit from an increasing interest for geologic model building [8,34].…”

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HexaShrink, an exact scalable framework for hexahedral meshes with attributes and discontinuities: multiresolution rendering and storage of geoscience models

et al. 2019

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With huge data acquisition progresses realized in the past decades and acquisition systems now able to produce high resolution grids and point clouds, the digitization of physical terrains becomes increasingly more precise. Such extreme quantities of generated and modeled data greatly impact computational performances on many levels of high-performance computing (HPC): storage media, memory requirements, transfer capability, and finally simulation interactivity, necessary to exploit this instance of big data. Efficient representations and storage are thus becoming This work was partly presented in [43]. This is a post-peerreview, pre-copyedit version of an article published in Computational Geosciences. The final authenticated version is available online at: http://dx.

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confidence: 99%

“…meshes are commonly handled in biomedical engineering [28], computational materials science [39] and in geosciences. They are for instance used by geologists to study flow simulations for reservoir modelling [7], and benefit from an increasing interest for geologic model building [8,34].…”

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confidence: 99%

HexaShrink, an exact scalable framework for hexahedral meshes with attributes and discontinuities: multiresolution rendering and storage of geoscience models

et al. 2019

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“…The usage of a complete hexahedral mesh, with matching interfaces, bears a much more difficult task in mesh generation than a tetrahedral mesh. Even though the software Cubit offers automatic hex-mesh routines like sculpt [62], the resulting mesh quality turned out to be not fully satisfactory in the present case, especially in the proximity of interfaces or corners with sharp angles. The process of mesh generation for this work was done in a semi-automatic way, where in a manual pre-processing step the three blocks of the CAD model were subdivided into even more smaller blocks, each with an easily meshable form.…”

Section: Geometry Acquisition and Mesh Generationmentioning

confidence: 80%

Elasto-acoustic modelling and simulation for the seismic response of structures: The case of the Tahtalı dam in the 2020 İzmir earthquake

Mazzieri,

Muhr,

Stupazzini

et al. 2021

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As a mean to assess the risk dam structures are exposed to during earthquakes, we employ an abstract mathematical, three dimensional, elasto-acoustic coupled wave-propagation model taking into account (i) the dam structure itself, embedded into (ii) its surrounding topography, (iii) different material soil layers, (iv) the seismic source as well as (v) the reservoir lake filled with water treated as an acoustic medium. As a case study for extensive numerical simulations we consider the magnitude 7 seismic event of the 30 th of October 2020 taking place in the Icarian Sea (Greece) and the Tahtalı dam around 30 km from there (Turkey). A challenging task is to resolve the multiple length scales that are present due to the huge differences in size between the dam building structure and the area of interest, considered for the propagation of the earthquake. Interfaces between structures and highly non-conforming meshes on different scales are resolved by means of a discontinuous Galerkin approach. The seismic source is modeled using inversion data about the real fault plane. Ultimately, we perform a real data driven, multi-scale, full source-to-site, physics based simulation based on the discontinuous Galerkin spectral element method, which allows to precisely validate the ground motion experienced along the Tahtalı dam, comparing the synthetic seismograms against actually observed ones. A comparison with a more classical computational method, using a plane wave with data from a deconvolved seismogram reading as an input, is discussed.

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“…Do so by sub-dividing the dense inner grid layer of the tip into spatially disjoint regions. Parallelized adaptive meshing tools (de Cougny et al, 1994; de Cougny & Shephard, 1999; Fryxell et al, 2000; Loseille et al, 2015; Owen et al, 2017) are an alternative to consider when improving the meshing process.In each such mesh region, all nodes should be stored in a contiguous array. Each thread then gets assigned one region to process.…”

Section: Resultsmentioning

confidence: 99%

Building a Library of Simulated Atom Probe Data for Different Crystal Structures and Tip Orientations Using TAPSim

et al. 2019

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The process of building an open source library of simulated field desorption maps for differently oriented synthetic tips of the face-centered cubic, body-centered cubic, and hexagonal-close-packed crystal structures using the open source software TAPSim is reported. Specifically, the field evaporation of a total set of 4 × 101 single-crystalline tips was simulated. Their lattices were oriented randomly to sample economically the fundamental zone of crystal orientations. Such data are intended to facilitate the interpretation of low-density zone lines and poles that are observed on detector hit maps during Atom Probe Tomography (APT) experiments. The datasets and corresponding tools have been made publicly available to the APT community in an effort to provide better access to simulated atom probe datasets. In addition, a computational performance analysis was conducted, from which recommendations are made as to which key tasks should be optimized in the future to improve the parallel efficiency of TAPSim.

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Hexahedral Mesh Generation for Computational Materials Modeling

Cited by 31 publications

References 8 publications

HexaShrink, an exact scalable framework for hexahedral meshes with attributes and discontinuities: multiresolution rendering and storage of geoscience models

HexaShrink, an exact scalable framework for hexahedral meshes with attributes and discontinuities: multiresolution rendering and storage of geoscience models

Elasto-acoustic modelling and simulation for the seismic response of structures: The case of the Tahtalı dam in the 2020 İzmir earthquake

Building a Library of Simulated Atom Probe Data for Different Crystal Structures and Tip Orientations Using TAPSim

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