Recent Submissions

  • Finite Element simulations: computations and applications to aerodynamics and biomedicine 

    Leoni M. (2020-12-11)
    Partial Differential Equations describe a large number of phenomena of practical interest and their solution usually requires running huge simulations on supercomputing clusters. Especially when dealing with turbulent ...
  • Computability and Adaptivity in CFD 

    Hoffman J.; Jansson J.; Jansson N.; Vilela De Abreu R.; Johnson C. (Wiley Online Library, 2019)
    We give a brief introduction to research on adaptive computational methods for laminar compressible and incompressible flow, and then focus on computability and adaptivity for turbulent incompressible flow, where we present ...
  • High Performance Scientific Computing in Applications with Direct Finite Element Simulation 

    Krishnasamy E. (2020-06-18)
    To predict separated flow including stall of a full aircraft with Computational Fluid Dynamics (CFD) is considered one of the problems of the grand challenges to be solved by 2030, according to NASA [1]. The nonlinear ...
  • Direct FEM computation of turbulent multiphase flow in 3D priting nozzle design 

    Krishnasamy E.; Jansson J. (2020)
    In this paper, we present a nozzle design of the 3D printing using FEniCS-HPC as mathematical and simulation tool. In recent years 3D printing or Additive Manufacturing (AM) has become a emerging technology and it has ...
  • Control of distributed parameter systems modelled by parabolic variational inequalities of the obstacle type 

    Kumar R.; Glowinski R.; Jansson J. (2019)
    We will investigate the numerical solution of the control problem modelled by parabolic variational inequalities. The general point of view adopted in this work has its roots in the work by R. Glowinski. The optimal control ...
  • Portable simulation framework for diffusion MRI 

    Nguyen V.D.; Leoni M.; Dancheva T.; Jansson J.; Hoffman J.; Wassermann D.; Li J.R. (Journal of Magnetic Resonance, 2019-09-23)
    The numerical simulation of the diffusion MRI signal arising from complex tissue micro-structures is helpful for understanding and interpreting imaging data as well as for designing and optimizing MRI sequences. The ...
  • A C0 interior penalty discontinuous Galerkin method for fourth‐order total variation flow I: Derivation of the method and numerical results 

    Kumar R.; Hoppe R.H.W.; Bhandari C. (NMPDE:Numerical Methods For Partial Differential Equations, 2019-02-23)
    We consider the numerical solution of a fourth‐order total variation flow problem representing surface relaxation below the roughening temperature. Based on a regularization and scaling of the nonlinear fourth‐order parabolic ...
  • A C 0 interior penalty discontinuous Galerkin Method for fourth-order total variation flow. II: Existence and uniqueness 

    Kumar R.; Hoppe R.H.W.; Bhandari C. (NMPDE:Numerical Methods For Partial Differential Equations, 2019-02-25)
    We prove the existence and uniqueness of a solution of a C0 Interior Penalty Discontinuous Galerkin (C0 IPDG) method for the numerical solution of a fourth‐order total variation flow problem that has been developed in part ...
  • Nonlinear computations of heave motions for a generic Wave Energy Converter 

    Janson C.E.; Shiri A.; Jansson J.; Moragues Ginard M.; Castanon D.; Saavedra L.; Degirmenci N.C.; Leoni M. (In Vittorio Bucci Alberto Marinò (Eds.), Technology and Science for the Ships of the Future, Proceedings of NAV 2018: 19th International Conference on Ship and Maritime Research, IOS Press BV, 2018)
    A bench-marking activity of numerical methods for analysis of Wave Energy Converters (WEC) was proposed under the Ocean Energy Systems (OES) International Energy Agency (IEA) Task 10 in 2015. The purpose of the benchmark ...
  • Finite Element Simulations of Two-phase Flow and Floating Bodies Using FEniCS-HPC 

    Moragues M.; Castanon D.; Degirmenci N.C.; Jansson J.; Nava V.; Krishnasamy E.; Hoffman J. (13th World Congress in Computational Mechanics WCCM, New York, USA, 2018-07)
    We present a variational multiscale stabilized finite element method to solve the variable density incompressible Navier-Stokes equations for the simulation of two-phase flow. We introduce a level-set method based on the ...
  • Adaptive Direct FEM Simulation with Unicorn/FEniCS-HPC for CS1 

    Jansson J.; Krishnasamy E.; Leoni M. (5th International Workshop on High Order CFD Methods, 2018-01-01)
  • International energy agency ocean energy systems task 10 wave energy converter modeling verification and validation 

    Wendt F.F.; Yu Y.-H.; Nielsen K.; Ruehl K.; Bunnik T.; Touzon I.; Nam B.W.; Kim J.S.; Kim K.-H.; Janson C.E.; Jansson J. (Proceedings of European Wave and Tidal Energy Conference, 2017)
    This is the first joint reference paper for the Ocean Energy Systems (OES) Task 10 Wave Energy Converter modeling verification and validation group. The group is established under the OES Energy Technology Network program ...
  • A partition of unity finite element method for computational diffusion MRI 

    Nguyen V.D.; Jansson J.; Hoffman J.; Li J.R. (Journal of Computational Physics, 2018)
    The Bloch–Torrey equation describes the evolution of the spin (usually water proton) magnetization under the influence of applied magnetic field gradients and is commonly used in numerical simulations for diffusion MRI ...
  • Simulation of the HarshLab floating platform for offshore experimentation using FEniCS-HPC 

    Moragues M.; Castanon D.; Jansson J.; Nava V.; Krishnasamy E.; Degirmenci N.C.; Nguyen V.D.; Garrido C.; Sanchez M.; Rodriguez-Arias R. (Poster EUSKAMPUS IV Marine Energy Conference, 2017)
  • Direct finite element simulation of turbulent flow for marine based renewable energy 

    Jansson J.; Nguyen V.D.; Moragues M.; Castanon D.; Saavedra L.; Krishnasamy E.; Goude A.; Hoffman J. (Companion paper to F. Wendt, et. al. International energy agency ocean energy systems task 10 wave energy converter modeling verification and validation. In 12th European Wave and Tidal Energy Conference, 2017., 2017)
    In this article we present a computational framework for simulation of turbulent flow in marine based renewable energy applications. In particular, we focus on floating structures and rotating turbines. This work is an ...
  • Numerical simulation of the von Kármán sodium dynamo experiment 

    Nore C.; Castanon Quiroz D.; Cappanera L.; Guermond, L.J. (Journal of Fluid Mechanics, 2018-09-03)
    We present hydrodynamic and magnetohydrodynamic (MHD) simulations of liquid sodium flows in the von Kármán sodium (VKS) set-up. The counter-rotating impellers made of soft iron that were used in the successful 2006 experiment ...
  • Variational multiscale stabilization for compressible flow 

    Moragues Ginard M.; Vázquez M.; Houzeaux G. (Computer Methods in Applied Mechanics and Engineering, 2018)
    This paper presents a variational multiscale stabilization for the finite element numerical solution of the Euler and Navier-Stokes equations of compressible flow. All the components of the dual operator are considered in ...
  • Time-resolved Adaptive Direct FEM Simulation of High-lift Aircraft Configurations 

    Jansson J.; Krishnasamy E.; Leoni M.; Jansson N.; Hoffman J. (Numerical simulation of the aerodynamics of high-lift configurations, 2017-08-01)
    Our simulation methodology is referred to as Direct FEM Simulation (DFS), or General Galerkin (G2) and uses a finite element method (FEM) with piecewise linear approximation in space and time, and with numerical stabilization ...
  • Towards HPC-Embedded Case Study: Kalray and Message-Passing on NoC 

    Valero-Lara P.; Krishnasamy E.; Jansson J. (Scalable Computing, 2017)
    Today one of the most important challenges in HPC is the development of computers with a low power consumption. In this context, recently, new embedded many-core systems have emerged. One of them is Kalray. Unlike other ...
  • Towards the development of adaptive finite element methods for internal flow aeroacoustics 

    de Abreu R.V.; Hoffman J.; Jansson J. (19th AIAA/CEAS Aeroacoustics Conference, 2013-12-31)
    We report the latest results obtained in the development of an adaptive finite element method for computational aeroacoustics (CAA). The new methodology is based on the General Galerkin (G2) method, which has been successfully ...

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