Now showing items 1-20 of 24

    • A distortion measure to validate and generate curved high-order meshes on CAD surfaces with independence of parameterization 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (John Wiley & Sons, 2016-06)
      Article
      Open Access
      A 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 procedure to smooth and untangle meshes on parameterized surfaces 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Vienna University of Technology, 2012)
      Conference report
      Open Access
      We 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 surface mesh smoothing and untangling method independent of the CAD parameterization 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2014-04-01)
      Article
      Open Access
      A 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 ...
    • An augmented Lagrangian formulation to impose boundary conditions for distortion based mesh moving and curving 

      Ruiz Gironès, Eloi; Gargallo Peiró, Abel; Sarrate Ramos, Josep; Roca Navarro, Francisco Javier (Elsevier, 2017)
      Conference report
      Restricted access - publisher's policy
      We 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 ...
    • Automatically imposing incremental boundary displacements for valid mesh morphing and curving 

      Ruiz Gironès, Eloi; Gargallo Peiró, Abel; Sarrate Ramos, Josep; Roca, Xevi (2019-07)
      Article
      Open Access
      We present a new incremental mesh morphing method obtained by proposing and discretizing a solution procedure for the continuous morphing problem. Our method seeks a diffeomorphism that transforms an initial domain to a ...
    • Curved geometry modeling: interpolation of subdivision features 

      Jiménez Ramos, Albert; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Barcelona Supercomputing Center, 2021-05)
      Conference report
      Open Access
      We present a nodal interpolation method to approximate a subdivision model. The main application is to model and represent curved geometry without gaps and preserving the required simulation intent. Accordingly, the ...
    • Defining a stretching and alignment aware quality measure for linear and curved 2D meshes 

      Aparicio Estrems, Guillermo; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Barcelona Supercomputing Center, 2019-05-07)
      Conference report
      Open Access
      We define a regularized shape distortion (quality) measure for curved high-order 2D elements on a Riemannian plane. To this end, we measure the deviation of a given 2D element, straight-sided or curved, from the stretching ...
    • Defining a stretching and alignment aware quality measure for linear and curved 2D meshes 

      Aparicio Estrems, Guillermo; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Springer, 2018)
      Conference report
      Open Access
      We define a regularized shape distortion (quality) measure for curved high-order 2D elements on a Riemannian plane. To this end, we measure the deviation of a given 2D element, straight-sided or curved, from the stretching ...
    • Defining quality measures for validation and generation of high-order meshes 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (Springer, 2013)
      Conference report
      Restricted access - publisher's policy
      A procedure to quantify the distortion (quality) of a high-order mesh composed by curved tetrahedral elements is presented. The proposed technique has two main applications. First, it can be used to check the validity and ...
    • Distortion and quality measures for validating and generating high-order tetrahedral meshes 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (2015-07-01)
      Article
      Open Access
      A procedure to quantify the distortion (quality) of a high-order mesh composed of curved tetrahedral elements is presented. The proposed technique has two main applications. First, it can be used to check the validity and ...
    • High-order mesh generation on CAD geometries 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
      Conference report
      Restricted access - publisher's policy
      We present a technique to extend Jacobian-based distortion (quality) measures for planar triangles to high-order isoparametric elements of any interpolation degree on CAD parameterized surfaces. The resulting distortion ...
    • Inserting curved boundary layers for viscous flow simulation with high-order tetrahedra 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep; Peraire Guitart, Jaume (Springer, 2013)
      Conference lecture
      Restricted access - publisher's policy
      We propose an a posteriori approach for generating curved meshes for viscous flow simulations composed by high-order tetrahedra. The proposed approach is performed in the following three steps: (1) generate a linear ...
    • Local bisection for conformal refinement of unstructured 4D simplicial meshes 

      Belda-Ferrín, Guillem; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Barcelona Supercomputing Center, 2019-05-07)
      Conference report
      Open Access
      We present a conformal bisection procedure for local refinement of 4D unstructured simplicial meshes with bounded minimum shape quality. Specifically, we propose a recursive refine-to-conformity procedure in two stages, ...
    • Local bisection for conformal refinement of unstructured 4D simplicial meshes 

      Belda Ferrín, Guillem; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Springer, 2018)
      Conference report
      Open Access
      We present a conformal bisection procedure for local refinement of 4D unstructured simplicial meshes with bounded minimum shape quality. Specifically, we propose a recursive refine to conformity procedure in two stages, ...
    • Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs 

      Gargallo Peiró, Abel; Avila, Matias; Owen, Herbert; Prieto-Godino, Luis; Folch, Arnau (Elsevier, 2018-12)
      Article
      Open Access
      A new mesh generation process for wind farm modeling is presented together with a mesh convergence and sizing analysis for wind farm flow simulations. The generated meshes are tailored to simulate Atmospheric Boundary Layer ...
    • On curving high-order hexahedral meshes 

      Gargallo Peiró, Abel; Ruiz Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Elsevier, 2015)
      Conference lecture
      Open Access
      We present a new definition of distortion and quality measures for high-order hexahedral (quadrilateral) elements. This definition leads to two direct applications. First, it can be used to check the validity and quality ...
    • Optimization of a regularized distortion measure to generate curved high-order unstructured tetrahedral meshes 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (2015-08-03)
      Article
      Open Access
      We present a robust method for generating high-order nodal tetrahedral curved meshes. The approach consists of modifying an initial linear mesh by first, introducing high-order nodes, second, displacing the boundary nodes ...
    • Smoothing and untangling of meshes on parameterized surfaces 

      Gargallo Peiró, Abel (Universitat Politècnica de Catalunya, 2011-01)
      Master thesis
      Open Access
      The aim of this work is to develop a simultaneous smoothing-untangling procedure for parametrized surfaces. To this end we will extend the definition of the quality metrics for planar meshes to parametrized surface meshes. ...
    • Smoothing and untangling triangular meshes on surfaces 

      Gargallo Peiró, Abel (Universitat Politècnica de Catalunya, 2010-06)
      Master thesis (pre-Bologna period)
      Open Access
      In this work it has been developed the basis of shape quality metrics for triangular meshes on surfaces. It has also been worked out a simultaneous smoothing-untangling procedure based on the ideas introduced by Escobar. ...
    • Specific-purpose globalizations for Newton’s method: anisotropic optimization of curved meshes 

      Aparicio Estrems, Guillermo; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Barcelona Supercomputing Center, 2020-05)
      Conference report
      Open Access
      We derive an optimization method to adapt straight-edged and curved piece-wise polynomial meshes to the stretching and alignment of a target metric. Two globalization strategies for the optimization method are proposed: ...