Ruiz Girones, Eloi
Total activity: 11
Department
Department of Applied Mathematics III
E-mail
eloi.ruizupc.edu
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Scientific and technological production
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1 to 11 of 11 results
  • Preserving isotropic element size functions in adaptivity, quadrilateral and hexahedral mesh generation

     Ruiz Girones, Eloi; Roca Navarro, Xevi; Sarrate Ramos, Jose
    Advances in engineering software
    Vol. 65, p. 168-181
    Date of publication: 2013
    Journal article

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    In electric circuit theory, it is of great interest to compute the effective resistance between any pair of vertices of a network, as well as the Kirchhoff Index. During the last decade these parametres have been applied in Organic Chemistry as natural structural indexes different from the usual ones in order to achieve an improvement in the discrimination between different molecules which have similar structural behaviours. Moreover, a wide range of generalized Kirchhoff Indexes for some networks have been introduced. The objective of the present work is to obtain the Kirchhoff Index for a wide range of composite networks known as cluster networks

    In electric circuit theory, it is of great interest to compute the effective resistance between any pair of vertices of a network, as well as the Kirchhoff Index. During the last decade these parametres have been applied in Organic Chemistry as natural structural indexes different from the usual ones in order to achieve an improvement in the discrimination between different molecules which have similar structural behaviours. Moreover, a wide range of generalized Kirchhoff Indexes for some networks have been introduced. The objective of the present work is to obtain the Kirchhoff Index for a wide range of composite networks known as cluster networks.

  • The receding front method applied to hexahedral mesh generation of exterior domains

     Ruiz Girones, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Jose
    Engineering with computers
    Vol. 28, num. 4, p. 391-408
    DOI: 10.1007/s00366-011-0233-y
    Date of publication: 2011-11-30
    Journal article

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  • Unstructures hexahedral mesh generation for esterior domains by the receding front method

     Ruiz Girones, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Jose
    Congreso en Métodos Numéricos em Engenharia
    p. 211-
    Presentation's date: 2011-06-15
    Presentation of work at congresses

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  • Unstructured hexaedral mesh generation for exteroir domains by the receding front method

     Ruiz Girones, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Jose
    Congresso de Métodos Numéricos em Engenharia e Congresso Ibero Latino-Americano de Métodos Computacionais em Engenharia
    p. 1-17
    Presentation's date: 2011-06-14
    Presentation of work at congresses

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  • Automatic Hexahedral meshing algorithms: From structured to unstructured meshes

     Ruiz Girones, Eloi
    Department of Applied Mathematics III, Universitat Politècnica de Catalunya
    Theses

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  • Automatic hexaedral meshing algorithms: from structured to unstructured meshes

     Ruiz Girones, Eloi
    Department of Applied Mathematics III, Universitat Politècnica de Catalunya
    Theses

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    Using a computational domain and a three-stage node location procedure for multi-sweeping algorithms  Open access

     Ruiz Girones, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Jose
    Advances in engineering software
    Vol. 42, num. 9, p. 700-713
    DOI: 10.1016/j.advengsoft.2011.05.006
    Date of publication: 2011
    Journal article

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    The multi-sweeping method is one of the most used algorithms to generate hexahedral meshes for extrusion volumes. In this method the geometry is decomposed in sub-volumes by means of projecting nodes along the sweep direction and imprinting faces. However, the quality of the final mesh is determined by the location of inner nodes created during the decomposition process and by the robustness of the imprinting process. In this work we present two original contributions to increase the quality of the decomposition process. On the one hand, to improve the robustness of the imprints we introduce the new concept of computational domain for extrusion geometries. Since the computational domain is a planar representation of the sweep levels, we improve several geometric operations involved in the imprinting process. On the other hand, we propose a three-stage procedure to improve the location of the inner nodes created during the decomposition process. First, inner nodes are projected towards source surfaces. Second, the nodes are projected back towards target surfaces. Third, the final position of inner nodes is computed as a weighted average of the projections from source and target surfaces.

  • Inside-to-outside hex-meshing approach guided by level sets of distance functions

     Roca Navarro, Francisco Javier; Ruiz Girones, Eloi; Sarrate Ramos, Jose
    Hex Meshing and CFD blocking seminar
    Presentation's date: 2010
    Presentation of work at congresses

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  • Receding front method: a new approach applied to generate hexahedral meshes of outer domains

     Roca Navarro, Francisco Javier; Ruiz Girones, Eloi; Sarrate Ramos, Jose
    International Meshing Roundtable
    p. 1-17
    DOI: 10.1007/978-3-642-15414-0_13
    Presentation of work at congresses

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    Two of the most successful methods to generate unstructured hexahedral meshes are the grid-based methods and the advancing front methods. On the one hand, the grid-based methods generate high quality elements in the inner part of the domain using an inside-outside approach. On the other hand, advancing front methods generate high quality hexahedra near the boundary using an outside-inside approach. In this paper we propose the receding front method, an original approach that combines the advantages of both methodologies: we use an inside-outside mesh generation approach by means of a reversed front advance. We apply this approach to mesh outer domains. To reproduce the shape of the boundaries, we first precompute the mesh fronts by combining two solutions of the Eikonal equation on a tetrahedral reference mesh. Then, to generate high quality elements, we expand the quadrilateral surface mesh of the inner body towards the unmeshed external boundary using the pre-computed fronts as a guide. Further research is under way in order to apply the proposed method to more complicated geometries.

  • Access to the full text
    Automatic generation of hexahedral meshes for volumes with non-planar surfaces using the multi-sweeping method  Open access

     Ruiz Girones, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Jose
    International Conference on Engineering Computational Technology
    p. 1-19
    DOI: 10.4203/ccp.94.58
    Presentation's date: 2010
    Presentation of work at congresses

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    One 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 separately. However, the quality of the final mesh depends on the decomposition process. First, the location of inner nodes created during the decomposition process may induce bad quality elements. To avoid this drawback, we propose a three-stage decomposition process to locate those nodes. Second, the imprinting process is not robust when dealing with non-planar surfaces. For this reason, we introduce the new concept of the computational domain. The computational domain is a planar representation of the levels of the geometry. In this way, we improve the operations needed to perform imprints.

  • MÈTODES NUMÈRICS EN CIÈNCIES APLICADES I ENGINYERIA

     Roca Navarro, Francisco Javier; Giorgiani, Giorgio; Zlotnik, Sergio; Fernandez Mendez, Sonia; Rodriguez Ferran, Antonio; Muñoz Romero, Jose Javier; Arias Vicente, Irene; de Villardi de Montlaur, Adeline; Sarrate Ramos, Jose; Diez Mejia, Pedro; Arroyo Balaguer, Marino; Sevilla Cardenas, Ruben; Parés Mariné, Núria; Casoni Rero, Eva; Ruiz Girones, Eloi; Modesto Galende, David; Millan, Raul Daniel; Abdollahi Hosnijeh, Amir; Steffens, Lindaura Maria; Discacciati, Marco; Shen, Yongxing; Rahimi Lenji, Mohammad; Tamayo Mas, Elena; Diaz Cereceda, Cristina; Prat Robles, David; Verdugo Rojano, Francesc; Zhang, Kuan; Estela Carbonell, M. Rosa; Peco Regales, Christian; Pérez Foguet, Agustí; Angeloski, Aleksandar; Gargallo Peiró, Abel; Huerta Cerezuela, Antonio
    Competitive project

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