Browsing CFD Computational Technology by Title
Now showing items 21-40 of 43
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Introduction to the special issue on high performance computing solutions for complex problems
(2016-01-01)[No abstract available] -
Large Eddy Simulations of Isolated and Installed Jet Noise using the High-Order Discontinuous Galerkin Method
Lindblad, D.; Sherwin, S.J.; Cantwell, C.; Lawrence, J.; Proença, A.; Moragues, M.
(2023-01-19)
A recently developed computational framework for jet noise is used to compute the noise generated by an isolated and installed jet. The framework consists of two parts. In the first part, the spectral/hp element framework ... -
LBM-HPC - An open-source tool for fluid simulations. Case study: Unified parallel C (UPC-PGAS)
(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
(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 ... -
Leveraging the Performance of LBM-HPC for Large Sizes on GPUs using Ghost Cells
(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 ... -
Many-task computing on many-core architectures
(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
(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 ... -
Multipreconditioned GMRES for Shifted Systems
(2017-01-01)An implementation of GMRES with multiple preconditioners (MPGMRES) is proposed for solving shifted linear systems with shift-and-invert preconditioners. With this type of preconditioner, the Krylov subspace can be built ... -
Nektar++: Development of the Compressible Flow Solver for Large Scale Aeroacoustic Applications
Lindblad, D.; Isler, J.; Moragues, M.; Sherwin, S.J.; Cantwell, C. (2023)
A recently developed computational framework for jet noise predictions is presented. The framework consists of two main components, focusing on source prediction and noise propagation. To compute the noise sources, ... -
New Theory of Flight
Hoffman, J.; Jansson, J.; Claes, J. (2016-01-01)
We present a new mathematical theory explaining the fluid mechanics of subsonic flight, which is fundamentally different from the existing boundary layer-circulation theory by Prandtl–Kutta–Zhukovsky formed 100 year ago. ... -
A Non-uniform Staggered Cartesian Grid approach for Lattice-Boltzmann method
(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. ... -
Nonlinear computations of heave motions for a generic Wave Energy Converter
Janson, C.E.; Shiri, A.; Jansson, J.; Moragues, M.; Castanon, D.; Saavedra, L.; Degirmenci, N.C.; Leoni, M. (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 ... -
Numerical simulation of the von Kármán sodium dynamo experiment
(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 ... -
A partition of unity finite element method for computational diffusion MRI
Nguyen, V.D.; Jansson, J.; Hoffman, J.; Li, J.R. (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 ... -
Portable simulation framework for diffusion MRI
Nguyen, V.D.; Leoni, M.; Dancheva, T.; Jansson, J.; Hoffman, J.; Wassermann, D.; Li, J.R. (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 ... -
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. (2017)
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Time-resolved Adaptive Direct FEM Simulation of High-lift Aircraft Configurations
Jansson, J.; Krishnasamy, E.; Leoni, M.; Jansson, N.; Hoffman, J. (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 ... -
Time-resolved adaptive FEM simulation of the DLR-F11 aircraft model at high Reynolds number
Hoffman, J.; Jansson, J.; Jansson, N.; de Abreu, R.V. (2014-12-31)
We present a time-resolved, adaptive finite element method for aerodynamics, together with the results from the HiLiftPW-2 workshop, where this method is used to compute the ow past a DLR-F11 aircraft model at realistic ... -
Towards a parameter-free method for high Reynolds number turbulent flow simulation based on adaptive finite element approximation
Hoffman, J.; Jansson, J.; Jansson, N.; de Abreu, R.V. (2015-05-01)
This article is a review of our work towards a parameter-free method for simulation of turbulent flow at high Reynolds numbers. In a series of papers we have developed a model for turbulent flow in the form of weak solutions ... -
Towards HPC-Embedded Case Study: Kalray and Message-Passing on NoC
(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 ...