Now showing items 1-12 of 594

  • Swimming Euglena respond to confinement with a behavioural change enabling effective crawling 

    Noselli, Giovanni; Beran, Alfred; Arroyo Balaguer, Marino; DeSimone, Antonio (2019-02-18)
    Article
    Open Access
    Some euglenids, a family of aquatic unicellular organisms, can develop highly concerted, large-amplitude peristaltic body deformations. This remarkable behaviour has been known for centuries. Yet, its function remains ...
  • Modelling fluid deformable surfaces with an emphasis on biological interfaces 

    Torres Sánchez, Alejandro; Millán, Daniel; Arroyo Balaguer, Marino (2019-08-10)
    Article
    Restricted access - publisher's policy
    Fluid deformable surfaces are ubiquitous in cell and tissue biology, including lipid bilayers, the actomyosin cortex or epithelial cell sheets. These interfaces exhibit a complex interplay between elasticity, low Reynolds ...
  • 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 ...
  • An HDG formulation for incompressible and immiscible two-phase porous media flow problems 

    Costa Solé, Albert; Ruiz Gironès, Eloi; Sarrate Ramos, Josep (Taylor & Francis, 2019-05-27)
    Article
    Restricted access - publisher's policy
    We 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 ...
  • Tensor representation of non-linear models using cross approximations 

    Aguado, José Vicente; Borzacchiello, Domenico; Kollepara, Kiran Sagar; Chinesta Soria, Francisco; Huerta, Antonio (2019-02-19)
    Article
    Restricted access - publisher's policy
    Tensor representations allow compact storage and efficient manipulation of multi-dimensional data. Based on these, tensor methods build low-rank subspaces for the solution of multi-dimensional and multi-parametric models. ...
  • A hybridizable discontinuous Galerkin phase-field model for brittle fracture 

    Muixí Ballonga, Alba; Fernández Méndez, Sonia; Rodríguez Ferran, Antonio (2019-05-01)
    Article
    Open Access
    Phase-field models for brittle fracture consider smeared representations of cracks, which are described by a continuous field that varies abruptly in the transition zone between unbroken and broken states. Computationally, ...
  • Structural health monitoring by combining machine learning and dimensionality reduction techniques 

    Quaranta, Giacomo; López Tomás, Elena; Abisset-Chavanne, Emmanuelle; Duval, Jean Louis; Huerta, Antonio; Chinesta Soria, Francisco (2019-01-01)
    Article
    Open Access
    Structural Health Monitoring is of major interest in many areas of structural mechanics. This paper presents a new approach based on the combination of dimensionality reduction and data-mining techniques able to differentiate ...
  • Comparison of continuous and hybridizable discontinuous Galerkin methods in incompressible fluid flow problems 

    Fernández Méndez, Sonia (International Centre for Numerical Methods in Engineering (CIMNE), 2017)
    Conference report
    Restricted access - publisher's policy
    A comparison of the computational efficiency between Continuous Galerkin (CG) methods, with Taylor–Hood approximations, and Hybridizable Discontinuous Galerkin (HDG) methods is presented for the solution of the incompressible ...
  • Coupling of continuous and HDG methods 

    Paipuri, Mahendra; Tiago, Carlos; Fernández Méndez, Sonia (International Centre for Numerical Methods in Engineering (CIMNE), 2018)
    Conference report
    Open Access
    A coupling strategy between hybridizable discontinuous Galerkin (HDG) and continuous Galerkin (CG) methods is proposed in the framework of second-order elliptic operators. The coupled formulation is implemented and its ...
  • Comparison of high-order continuous and hybridizable discontinuous {G}alerkin methods in incompressible fluid flow problems 

    Paipuri, Mahendra; Fernández Méndez, Sonia; Tiago, Carlos (2018-10-01)
    Article
    Open Access
    The computational efficiency and the stability of Continuous Galerkin (CG) methods, with Taylor–Hood approximations, and Hybridizable Discontinuous Galerkin (HDG) methods are compared for the solution of the incompressible ...
  • Classifying granular materials for feeding performance using experimental and numerical techniques 

    Torres Serra, Joel; Caba, Joan; Rodríguez Ferran, Antonio; Romero Morales, Enrique Edgar (2018)
    Conference report
    Restricted access - publisher's policy
    Flowability of powders and bulk solids is critical for the packaging industry in the selection and design of bulk material handling equipment. Nowadays, a variety of feeder systems are used for dosing operations in bagging ...
  • Hygroscopicity issues in powder and grain technology 

    Torres Serra, Joel; Romero Morales, Enrique Edgar; Rodríguez Ferran, Antonio (The Hong Kong University of Science and Technology (HKUST), 2018)
    Conference report
    Open Access
    The effect of hygroscopicity on flowability of powders and bulk solids with applications in the packaging industry is experimentally and numerically investigated. Firstly, four granular materials are tested at different ...