145 citations · 247 across the 18 of their papers we have counts for
19 papers
Low-Order Refined Preconditioning for Spectral/hp Element Method for Complex, 3D Geometries
Parv Khurana, Henrik Wüstenberg, Spencer J. Sherwin +3
Low-order refined (LOR) preconditioning replaces a high-order operator with a low-order discretisation on a refined nodal mesh. For tensor-product elements, the two operators are s…
NektarIR: A Domain-Specific Compiler for High-Order Finite Element Operations on Heterogeneous Hardware
Edward Erasmie-Jones, Giacomo Castiglioni, David Moxey
Modern high performance computing (HPC) applications must target heterogeneous hardware. This requires significant work to ensure domain specific implementations translate to highl…
Implicit Velocity Correction Schemes for Scale-Resolving Simulations of Incompressible Flow: Stability, Accuracy, and Performance
Henrik Wüstenberg, Alexandra Liosi, Spencer J. Sherwin +2
Scale-resolving simulations of high-Reynolds-number incompressible flow are often limited by the Courant--Friedrichs--Lewy (CFL) restriction of explicit time-stepping schemes, lead…
Architecture-aware -to- optimisation: spectral/ element operators for mixed-element meshes
Jacques Y. Xing, Boyang Xia, Diego Renner +4
We extend earlier international efforts to optimise hexahedral-based spectral element methods on GPUs and vectorised CPUs to mixed element meshes additionally involving prismatic,…
A geometrically informed algebraic multigrid preconditioned iterative approach for solving high-order finite element systems
Songzhe Xu, Majid Rasouli, Robert M. Kirby +2
Algebraic multigrid (AMG) is conventionally applied in a black-box fashion, agnostic to the underlying geometry. In this work, we propose that using geometric information -- when a…
Fast Barycentric-Based Evaluation Over Spectral/hp Elements
Edward Laughton, Vidhi Zala, Akil Narayan +2
As the use of spectral/ element methods, and high-order finite element methods in general, continues to spread, community efforts to create efficient, optimized algorithms asso…
Industry-Relevant Implicit Large-Eddy Simulation of a High-Performance Road Car via Spectral/hp Element Methods
Gianmarco Mengaldo, David Moxey, Michael Turner +5
We present a successful deployment of high-fidelity Large-Eddy Simulation (LES) technologies based on spectral/hp element methods to industrial flow problems, which are characteriz…
A comparison of interpolation techniques for non-conformal high-order discontinuous Galerkin methods
Edward Laughton, Gavin Tabor, David Moxey
The capability to incorporate moving geometric features within models for complex simulations is a common requirement in many fields. Fluid mechanics within aeronautical applicatio…
Accelerating Uncertainty Quantification of Groundwater Flow Modelling Using a Deep Neural Network Proxy
Mikkel B. Lykkegaard, Tim J. Dodwell, David Moxey
Quantifying the uncertainty in model parameters and output is a critical component in model-driven decision support systems for groundwater management. This paper presents a novel…
Nektar++: Design and implementation of an implicit, spectral/ element, compressible flow solver using a Jacobian-free Newton Krylov approach
Zhen-Guo Yan, Yu Pan, Giacomo Castiglioni +4
At high Reynolds numbers, the use of explicit in time compressible flow simulations with spectral/ element discretization can become significantly limited by time step. To alle…
Spectral/hp element simulation of flow past a Formula One front wing: validation against experiments
Filipe F. Buscariolo, Julien Hoessler, David Moxey +6
Emerging commercial and academic tools are regularly being applied to the design of road and race cars, but there currently are no well-established benchmark cases to study the aer…
-adaptation for compressible flows
Julian Marcon, Giacomo Castiglioni, David Moxey +2
We present an -adaptation strategy for high-fidelity simulation of compressible inviscid flows with shocks. The mesh resolution in regions of flow discontinuities is increased…
Nektar++: enhancing the capability and application of high-fidelity spectral/ element methods
David Moxey, Chris D. Cantwell, Yan Bao +14
Nektar++ is an open-source framework that provides a flexible, high-performance and scalable platform for the development of solvers for partial differential equations using the hi…
A semi-structured approach to curvilinear mesh generation around streamlined bodies
Julian Marcon, Joaquim Peiró, David Moxey +3
We present an approach for robust high-order mesh generation specially tailored to streamlined bodies. The method is based on a semi-sructured approach which combines the high qual…
High-order curvilinear hybrid mesh generation for CFD simulations
Julian Marcon, Michael Turner, Joaquim Peiró +4
We describe a semi-structured method for the generation of high-order hybrid meshes suited for the simulation of high Reynolds number flows. This is achieved through the use of hig…
A variational approach to high-order r-adaptation
Julian Marcon, Michael Turner, David Moxey +2
A variational framework, initially developed for high-order mesh optimisation, is being extended for r-adaptation. The method is based on the minimisation of a functional of the me…
Combined CG-HDG Method for Elliptic Problems: Performance Model
Martin Vymazal, David Moxey, Chris Cantwell +2
We combine continuous and discontinuous Galerkin methods in the setting of a model diffusion problem. Starting from a hybrid discontinuous formulation, we replace element interiors…
Implicit Large Eddy Simulation of a wingtip vortex at
Jean-Eloi W. Lombard, David Moxey, Julien F. A. Hoessler +3
In this article we present recent developments in numerical methods for performing a Large Eddy Simulation (LES) of the formation and evolution of a wingtip vortex. The development…
Simplifying the Development, Use and Sustainability of HPC Software
Jeremy Cohen, Chris Cantwell, Neil Chue Hong +5
Developing software to undertake complex, compute-intensive scientific processes requires a challenging combination of both specialist domain knowledge and software development ski…