CFD Computational Technology
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Nektar++: Development of the Compressible Flow Solver for Large Scale Aeroacoustic Applications
(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 HighOrder Discontinuous Galerkin Method
(20230119)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 HighOrder Discontinuous Galerkin Method
(20230608)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
(2022)In this work, the opensource 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 highorder ... 
Finite Element simulations: computations and applications to aerodynamics and biomedicine
(20201211)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
(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
(20200618)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
(2020)In this paper, we present a nozzle design of the 3D printing using FEniCSHPC 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
(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
(20190923)The numerical simulation of the diffusion MRI signal arising from complex tissue microstructures 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
(20190223)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 fourthorder total variation flow. II: Existence and uniqueness
(20190225)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
(2018)A benchmarking 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 Twophase Flow and Floating Bodies Using FEniCSHPC
(201807)We present a variational multiscale stabilized finite element method to solve the variable density incompressible NavierStokes equations for the simulation of twophase flow. We introduce a levelset method based on the ... 
International energy agency ocean energy systems task 10 wave energy converter modeling verification and validation
(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
(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 ... 
Direct finite element simulation of turbulent flow for marine based renewable energy
(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
(20180903)We present hydrodynamic and magnetohydrodynamic (MHD) simulations of liquid sodium flows in the von Kármán sodium (VKS) setup. The counterrotating impellers made of soft iron that were used in the successful 2006 experiment ...