Now showing items 1-20 of 31

• #### A Non-uniform Staggered Cartesian Grid approach for Lattice-Boltzmann method ﻿

(Procedia Computer Science, 2015-12-31)
We propose a numerical approach based on the Lattice-Boltzmann method (LBM) for dealing with mesh refinement of Non-uniform Staggered Cartesian Grid. We explain, in detail, the strategy for mapping LBM over such geometries. ...
• #### A two-level finite element discretization of the streamfunction formulation of the stationary quasi-geostrophic equations of the ocean ﻿

(Computers and Mathematics with Applications, 2013-12-31)
In this paper we proposed a two-level finite element discretization of the nonlinear stationary quasi-geostrophic equations, which model the wind driven large scale ocean circulation. Optimal error estimates for the two-level ...
• #### Accelerating fluid-solid simulations (Lattice-Boltzmann & Immersed-Boundary) on heterogeneous architectures ﻿

(Journal of Computational Science, 2015-12-31)
We propose a numerical approach based on the Lattice-Boltzmann (LBM) and Immersed Boundary (IB) methods to tackle the problem of the interaction of solids with an incompressible fluid flow, and its implementation on ...
• #### Adaptive Direct FEM Simulation with Unicorn/FEniCS-HPC for CS1 ﻿

(5th International Workshop on High Order CFD Methods, 2018-01-01)
• #### Adaptive simulation of unsteady flow past the submerged part of a floating wind turbine platform ﻿

(MARINE 2015 - Computational Methods in Marine Engineering VI, 2015-12-31)
Offshore floating platforms for wind turbines represent challenging concepts for designers trying to combine an optimal compromise between cost effectiveness and performance. Modelling of the hydrodynamic behaviour of the ...
• #### A $C^0$ INTERIOR PENALTY DISCONTINUOUS GALERKIN METHOD FOR FOURTH ORDER TOTAL VARIATION FLOW ﻿

(Journal of Mathematical analysis and applications, 2017)
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 ...
• #### Computation of slat noise sources using adaptive FEM and lighthill's analogy ﻿

(19th AIAA/CEAS Aeroacoustics Conference, 2013-12-31)
This is a summary of preliminary results from simulations with the 30P30N high-lift device. We used the General Galerkin finite element method (G2), where no explicit subgrid model is used, and where the computational mesh ...
• #### Direct FEM large scale computation of turbulent multiphase flow in urban water systems and marine energy ﻿

(Proceesings of ECCOMAS Congress 2016 VII European Congress on Computational Methods in Applied Sciences and Engineering, 2016-11-30)
High-Reynolds number turbulent incompressible multiphase flow represents a large class of engineering problems of key relevance to society. Here we describe our work on modeling two such problems: 1. The Consorcio de Aguas ...
• #### Direct finite element simulation of turbulent flow for marine based renewable energy ﻿

(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 ...
• #### A FEniCS-HPC framework for multi-compartment Bloch-Torrey models ﻿

(Proceesings of ECCOMAS Congress 2016 VII European Congress on Computational Methods in Applied Sciences and Engineering, 2016-11-30)
In diffusion nuclear magnetic resonance (NMR) and diffusion magnetic resonance imaging (MRI), the multi-compartment Bloch-Torrey equation plays an important role in probing the diffusion characteristics from a nanometer ...
• #### FEniCS-HPC: Automated predictive high-performance finite element computing with applications in aerodynamics ﻿

(Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2016-01-01)
Developing multiphysics finite element methods (FEM) and scalable HPC implementations can be very challenging in terms of software complexity and performance, even more so with the addition of goal-oriented adaptive mesh ...
• #### Finite Element Simulations of Two-phase Flow and Floating Bodies Using FEniCS-HPC ﻿

(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 ...
• #### Framework for adaptive fluid-structure interaction with industrial applications ﻿

(International Journal of Materials Engineering Innovation, 2013-12-31)
We present developments in the Unicorn-HPC framework for unified continuum mechanics, enabling adaptive finite element computation of fluid-structure interaction, and an overview of the larger FEniCS-HPC framework for ...
• #### International energy agency ocean energy systems task 10 wave energy converter modeling verification and validation ﻿

(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 ...
• #### Introduction to the special issue on high performance computing solutions for complex problems ﻿

(Scalable Computing, 2016-01-01)
[No abstract available]
• #### LBM-HPC - An open-source tool for fluid simulations. Case study: Unified parallel C (UPC-PGAS) ﻿

(Proceedings - IEEE International Conference on Cluster Computing, ICCC, 2015-12-31)
The main motivation of this work is the evaluation of the Unified Parallel C (UPC) model, for Boltzmann-fluid simulations. UPC is one of the current models in the so-called Partitioned Global Address Space paradigm. This ...
• #### Leveraging the Performance of LBM-HPC for Large Sizes on GPUs using Ghost Cells ﻿

(ICA3PP: 15th International Conference on Algorithms and Architectures for Parallel Processing, 2016-11-10)
Today, we are living a growing demand of larger and more efficient computational resources from the scienti c community. On the other hand, the appearance of GPUs for general purpose computing supposed an important advance ...
• #### Leveraging the performance of LBM-HPC for large sizes on GPUs using ghost cells ﻿

(Algorithms and Architectures for Parallel Processing, 2016-11-25)
Today, we are living a growing demand of larger and more efficient computational resources from the scientific community. On the other hand, the appearance of GPUs for general purpose computing supposed an important advance ...
• #### Many-task computing on many-core architectures ﻿

(Scalable Computing, 2016-01-01)
Many-Task Computing (MTC) is a common scenario for multiple parallel systems, such as cluster, grids, cloud and supercomputers, but it is not so popular in shared memory parallel processors. In this sense and given the ...
• #### Multi-domain grid refinement for lattice-Boltzmann simulations on heterogeneous platforms ﻿

(Proceedings - IEEE 18th International Conference on Computational Science and Engineering, CSE 2015, 2016-01-01)
The main contribution of the present work consists of several parallel approaches for grid refinement based on a multi-domain decomposition for lattice-Boltzmann simulations. The proposed method for discretizing the fluid ...