Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"remeshing"”.
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Quadrilateral Remeshing and Efficient Surface Parameterization
In the third part, we deal explicitly with the problem of surface parameterization. We present two complementary methods for automatically improving mesh parameterization, and demonstrate that they provide a desirable combination of efficiency and quality. First, we describe a new iterative method …
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Algorithms for particle remeshing applied to smoothed particle hydrodynamics
… nearly incompressible fluid flows. As with the remeshing schemes used in mesh and grid-based methods, there is a need to use localized refinement in particle methods to reduce computational costs. Various forms of particle refinement have been proposed for particle-based methods such as Smoothed …
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Structured meshes: composition and remeshing guided by the Curve-Skeleton
Virtual sculpting is currently a broadly used modeling metaphor with rising popularity especially in the entertainment industry. While this approach unleashes the artists' inspiration and creativity and leads to wonderfully detailed and artistic 3D models, it has the side effect, purely technical, …
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Higher-order discontinuous modelling of fracturing in quasi-brittle materials
… from a continuum point of view, without remeshing. The attractive nature of this capability advocates potential for modelling mechanics of materials such as concrete, rock and masonry, but also a more general class of quasi-brittle materials. This work investigates and extends NMM …
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Mixed-Mode Crack Propagation in Functionally Graded Materials
… and graded materials is performed by means of a remeshing algorithm of the finite element method considering general mixed-mode and non-proportional loadings. Each step of crack growth simulation consists of calculation of mixed-mode SIFs, determination of crack growth based on fracture criteria, …
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High resolution algorithms for the Navier Stokes equations for generalized descretizations
… role of reconstruction as applied to adaptive remeshing is discussed and a new first order error estimator is presented. Numerical examples of the remeshing procedure include both smooth and discontinuous flows.
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A Parallel Boundary Conforming Method on Adaptive Moving Meshes for Multiphase Flows
… moving mesh method are: (1) the consistent local remeshing at the inter-processor boundaries between processors; and (2) the dynamic load balancing due to mesh adaptation. To address these issues, a parallel fast marching method is developed such that the characteristic mesh length can be computed …
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Special methods for fluid-object interactions and space-time computations
… need for flow subcomputations, mesh-moving or remeshing. Subsequently, the path of the object can be calculated more quickly and efficiently than traditional mesh-moving methods while producing comparable results. Implementation of the proposed SSTF formulation can improve the efficiency of …
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Uma estratégia adaptativa para problemas de contato em elasticidade
ln this work an adaptive remeshing scheme in used to solve contact problems with Coulomb friction. An existing 2D mesh generator based on a frontal technique is used for the construction of the initial mesh of triangular elements. The contact problem is then solved using a sequence of sub-problems …
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Near-wall similarity in three-dimensional turbulent boundary layers
… second topic involves an interactive adaptive remeshing algorithm. The interactive adaptive remeshing algorithm utilizing a frontal grid generator is compared to a single grid calculation. Several device dependent interactive graphics interfaces have been developed along with a device …
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The development of solution algorithms for compressible flows
… second topic involves an interactive adaptive remeshing algorithm. The interactive adaptive remeshing algorithm utilizing a frontal grid generator is compared to a single grid calculation. Several device dependent interactive graphics interfaces have been developed along with a device …
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Development of Surrogate Model for FEM Error Prediction using Deep Learning
… in the finite element solution using an adaptive remeshing scheme. Adaptive re-meshing is an iterative and computationally expensive process to reduce the error computed during the post-processing step. To overcome this limitation we propose an approach to replace it using data-driven techniques. …
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Geometry Projection Methods for Shape and Topology Optimization
… response analysis by eliminating the need for remeshing when the design changes and because they are naturally suitable for topology optimization. Here, the unambiguous geometry is projected onto the analysis space by means of a filtering technique. The filter is based on a bounded sample …
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A fast 3D particle method for simulations of buoyant and reacting flows
… kernel algorithm for treating diffusion and remeshing to maintain long time accuracy. The coupling between the vorticity transport and that of a dynamic scalar, in this case the temperature or density in a gravitational field, is manifested by the generation of vorticity. We demonstrate the …
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A numerical study of flow-structure interactions with application to flow past a pair of cylinders
… to efficiently move the mesh without remeshing. Efficient three-dimensional simulations with periodicity in at least one space direction are achieved using Hybrid Fourier-Jacobi expansions. Both 2D and 3D formulations can treat an arbitrary number of oscillating bodies. Due to the …
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Lagrangian methods for ballistic impact simulations/
… observed radial crack patterns. An adaptive remeshing strategy using finite elements is then explored and applied, with limited success, to the problem of predicting the transition from dwell to penetration for long-rod penetrators impacting confined ceramic targets at high velocities. …
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Finite element simulation of Durelli's photoelastic stress minimization method for shape optimization
… raiser boundary, followed by smoothing and remeshing subroutines. The criterion proposed for element "removal" was to select only a number of elements having lower stresses among those that are in the design domain and on the current boundary. This number was set by a removal rate and …
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Comparison of Two Vortex-in-cell Schemes Implemented to a Three-dimensional Temporal Mixing Layer
… schemes are used. The first one used periodic remeshing of the vortex particles along with fourth order finite difference approximation for the partial derivatives of the stretching and viscous terms. In the second scheme, derivatives are approximated by least squares polynomial. The novelty of …
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Rapid design and simulation of functional digital materials
… deformations to be simulated without costly remeshing. I implement this model in software and demonstrate its potential for parallelization by calculating each cell-cell interaction in a separate core of the GPU. I compare my simulation results with a professional multiphysics software …
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