Exploració per autor "Sarrate Ramos, Josep"
Ara es mostren els items 1-20 de 76
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A distortion measure to validate and generate curved high-order meshes on CAD surfaces with independence of parameterization
(John Wiley & Sons, 2016-06)
Article
Accés obertA framework to validate and generate curved nodal high-order meshes on Computer-Aided Design (CAD) surfaces is presented. The proposed framework is of major interest to generate meshes suitable for thin-shell and 3D finite ... -
A distortion measure to validate and generate curved high-order meshes on CAD surfaces with independence of parameterization
(Wiley Online Library, 2015-12-15)
Article
Accés obertA framework to validate and generate curved nodal high-order meshes on Computer-Aided Design (CAD) surfaces is presented. The proposed framework is of major interest to generate meshes suitable for thin-shell and 3D finite ... -
A new least-squares approximation of affine mappings for sweep algorithms
(2010-06)
Article
Accés obertThis paper presents a new algorithm to generate hexahedral meshes in extrusion geometries. Several algorithms have been devised to generate hexahedral meshes by projecting the cap surfaces along a sweep path. In all of ... -
A new procedure to compute imprints in multi-sweeping algorithms
(2009-10-25)
Text en actes de congrés
Accés obertOne of the most widely used algorithms to generate hexahedral meshes in extrusion volumes with several source and target surfaces is the multi-sweeping method. However, the multi-sweeping method is highly dependent on the ... -
A new procedure to smooth and untangle meshes on parameterized surfaces
(Vienna University of Technology, 2012)
Text en actes de congrés
Accés obertWe present a technique to extend any distortion (quality) measure for planar meshes to meshes on parameterized surfaces. The resulting distortion (quality) measure is expressed in terms of the parametric coordinates of the ... -
A posteriori finite element error bounds for non-linear outputs of the Helmholtz equation
(1999-09)
Article
Accés obertA Neumann subproblem a posteriori finite element procedure for the efficient and accurate calculation of rigorous, constant-free upper and lower bounds for non-linear outputs of the Helmholtz equation in two-dimensional ... -
A semi-analytical scheme for highly oscillatory integrals over tetrahedra
(John Wiley & Sons, 2017-08)
Article
Accés obertThis paper details a semi-analytical procedure to efficiently integrate the product of a smooth function and a complex exponential over tetrahedral elements. These highly oscillatory integrals appear at the core of different ... -
A surface mesh smoothing and untangling method independent of the CAD parameterization
(2014-04-01)
Article
Accés obertA method to optimize triangular and quadrilateral meshes on parameterized surfaces is proposed. The optimization procedure relocates the nodes on the surface to improve the quality (smooth) and ensures that the elements ... -
Adaptació de l’ensenyament semipresencial dels mètodes numèrics dins del marc del sistema ects
(Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2008-02-07)
Text en actes de congrés
Accés obertEn l’actualitat els mètodes numèrics s’han consolidat com una disciplina horitzontal en l’àmbit de l’enginyeria civil. En aquest sentit, les assignatures bàsiques relacionades directament amb els mètodes numèrics han ... -
Adaptive finite element strategies based on error assessment
(Wiley and Sons, 1999-09)
Article
Accés obertTwo main ingredients are needed for adaptive finite element computations. First, the error of a given solution must be assessed, by means of either error estimators or error indicators. After that, a new spatial discretization ... -
An augmented Lagrangian formulation to impose boundary conditions for distortion based mesh moving and curving
(Elsevier, 2017)
Text en actes de congrés
Accés restringit per política de l'editorialWe formulate a mesh morphing technique as mesh distortion minimization problem constrained to weakly satisfy the imposed displacement of the boundary nodes. The method is devised to penalize the appearance of inverted ... -
An augmented Lagrangian formulation to impose boundary conditions for distortion based mesh moving and curving
(Elsevier, 2017)
Article
Accés obertWe formulate a mesh morphing technique as mesh distortion minimization problem constrained to weakly satisfy the imposed displacement of the boundary nodes. The method is devised to penalize the appearance of inverted ... -
An automatic and general least-squares projection procedure for sweep meshing
(2010-01-07)
Article
Accés obert -
An HDG formulation for incompressible and immiscible two-phase porous media flow problems
(Taylor & Francis, 2019-05-27)
Article
Accés obertWe develop a high-order hybridisable discontinuous Galerkin (HDG) formulation to solve the immiscible and incompressible two-phase flow problem in a heterogeneous porous media. The HDG method is locally conservative, has ... -
An improved algorithm to smooth graded quadrilateral meshes preserving the prescribed element size
(2001-02)
Article
Accés obertIn the generation of quadrilateral unstructured meshes, special attention is focussed to the shape of the elements. This is because it is well known that the distortion of the elements and the accuracy of the analysis are ... -
An interactive mesh generation environment for geometry-based simulations. Progress updated
(2009-02-16T12:15:10Z)
Text en actes de congrés
Accés obertWe presented an overview of an interactive mesh generation environment in our previous work that it is being developed in the Laboratori de Càlcul Numèric (LaCàN). We started the development of the software in order to ... -
Approximation of immersed surfaces into a tetrahedral mesh generated by the meccano method
(2017)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, we present a new method to insert open surfaces into an existing tetrahedral mesh generated by the meccano method. The surfaces must be totally immersed in the mesh and must not intersect between them. The ... -
Arbitrary Lagrangian-Eulerian formulation for fluid-rigid body interaction
(2001-03)
Article
Accés obertA new formulation for two-dimensional fluid–rigid body interaction problems is developed. In particular, vortex-induced oscillations of a rigid body in viscous incompressible flow are studied. The incompressible Navier–Stokes ... -
Automatic generation of hexahedral meshes for volumes with non-planar surfaces using the multi-sweeping method
(2010)
Text en actes de congrés
Accés obertOne of the most used algorithms to generate hexahedral meshes for extrusion volumes is the multi-sweeping method. The algorithm decomposes the geometry into many-to-one sub-volumes and then meshes each sub-volume ... -
Automatic generation of quadrilateral structured meshes using linear programming and transfinite interpolation
(2009-04-30T11:25:15Z)
Text en actes de congrés
Accés obertThis paper presents an implementation of a structured quadrilateral algorithm called submapping. The meshing procedure splits the geometry into patches and then meshes each patch separately preserving the mesh compatibility ...
