• 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, ...

• 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 ...

• Aeroacoustic Analysis of a Closely Installed Chevron Nozzle Jet using the High-Order Discontinuous Galerkin Method 

  Lindblad, D.; Sherwin, S.; Cantwell, C.; Lawrence, J.; Proença, A.; Moragues, M. (2023-06-08)

  In this paper, we use Large Eddy Simulations (LES) in combination with the Ffowcs Williams - Hawkings method to study the influence of chevrons on the flow field as well as the noise produced by a closely installed M = 0.6 ...

• Aeroacoustic Analysis of a Subsonic Jet using the Discontinuous Galerkin Method 

  Lindblad, D.; Sherwin, S.; Cantwell, C.; Lawrence, J.; Proença, A.; Moragues, M. (2022)

  In this work, the open-source spectral/hp element framework Nektar++ (www.nektar.info) is coupled with the Antares library (www.cerfacs.fr/antares/) to predict noise from a subsonic jet. Nektar++ uses the high-order ...

• 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. (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. (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. (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. (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, 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 ...

• 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. (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. (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. (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. (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. (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. (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. (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 ...

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