TY - JOUR
T1 - NekMesh: An open-source high-order mesh generation framework
AU - Green, M.d.
AU - Kirilov, K.s.
AU - Turner, M.
AU - Marcon, J.
AU - Eichstädt, J.
AU - Laughton, E.
AU - Cantwell, C.d.
AU - Sherwin, S.j.
AU - Peiró, J.
AU - Moxey, D.
N1 - Funding Information:
This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement grant agreement No. 955923, as well as European Union FP7 and Horizon 2020 programs (grant nos. 265780, 671571 and 675008). We acknowledge support from the EPSRC under grants EP/L000407/1, EP/R029423/1, EP/W007886/1, EP/K038788/1 and EP/V001345/1, and from the UK Atomic Energy Authority as part of the ExCALIBUR project NEPTUNE. The ExCALIBUR programme (https://excalibur.ac.uk/) is supported by the UKRI Strategic Priorities Fund. The programme is co-delivered by the Met Office and EPSRC in partnership with the Public Sector Research Establishment, the UK Atomic Energy Authority (UKAEA) and UKRI research councils, including NERC, MRC and STFC. Computational resources were supported in part through the Imperial College Research Computing Service (https://doi.org/10.14469/hpc/2232).
Funding Information:
This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement grant agreement No. 955923 , as well as European Union FP7 and Horizon 2020 programs (grant nos. 265780 , 671571 and 675008 ). We acknowledge support from the EPSRC under grants EP/L000407/1 , EP/R029423/1 , EP/W007886/1 , EP/K038788/1 and EP/V001345/1 , and from the UK Atomic Energy Authority as part of the ExCALIBUR project NEPTUNE. The ExCALIBUR programme ( https://excalibur.ac.uk/ ) is supported by the UKRI Strategic Priorities Fund. The programme is co-delivered by the Met Office and EPSRC in partnership with the Public Sector Research Establishment, the UK Atomic Energy Authority (UKAEA) and UKRI research councils, including NERC, MRC and STFC. Computational resources were supported in part through the Imperial College Research Computing Service ( https://doi.org/10.14469/hpc/2232 ).
Publisher Copyright:
© 2024 The Author(s)
PY - 2024/5
Y1 - 2024/5
N2 - High-order spectral element simulations are now becoming increasingly popular within the computational modelling community, as they offer the potential to deliver increased accuracy at reduced cost compared to traditional low-order codes. However, to support accurate, high-fidelity simulations in complex industrial applications, there is a need to generate curvilinear meshes which robustly and accurately conform to geometrical features. This is, at present, a key challenge within the mesh generation community, with only a few open-source tools able to generate curvilinear meshes for complex geometries. We present NekMesh: an open-source mesh generation package which is designed to enable the generation of valid, high-quality curvilinear meshes of complex, three-dimensional geometries for performing high-order simulations. We outline the software architecture adopted in NekMesh, which uses a pipeline of processing modules to provide a flexible, CAD-independent high-order mesh processing tool, capable of both generating meshes for a wide range of use cases, as well as post-processing linear meshes from a range of input formats for use with high-order simulations. A number of examples in various application areas are presented, with a particular emphasis on challenging aeronautical and fluid dynamics test cases. Program summary: Program title: NekMesh (version 5.4.0) CPC Library link to program files: https://doi.org/10.17632/d82hjm4v6r.1 Licensing provisions: MIT Programming language: C++ External routines/libraries: Boost, TinyXML, OpenCASCADE, Triangle, TetGen, HDF5 Nature of problem: NekMesh is a high-order mesh generation framework with the goal of providing a robust framework to automate the process of generating valid meshes for complex three-dimensional CAD geometries. Solution method: Energy minimisation, solid body models and other techniques based around high-order finite element methods. Additional comments including restrictions and unusual features: The supplied cases require a system with 16384 MB of RAM for the automotive example and 32768 MB of RAM for the variational optimisation example.
AB - High-order spectral element simulations are now becoming increasingly popular within the computational modelling community, as they offer the potential to deliver increased accuracy at reduced cost compared to traditional low-order codes. However, to support accurate, high-fidelity simulations in complex industrial applications, there is a need to generate curvilinear meshes which robustly and accurately conform to geometrical features. This is, at present, a key challenge within the mesh generation community, with only a few open-source tools able to generate curvilinear meshes for complex geometries. We present NekMesh: an open-source mesh generation package which is designed to enable the generation of valid, high-quality curvilinear meshes of complex, three-dimensional geometries for performing high-order simulations. We outline the software architecture adopted in NekMesh, which uses a pipeline of processing modules to provide a flexible, CAD-independent high-order mesh processing tool, capable of both generating meshes for a wide range of use cases, as well as post-processing linear meshes from a range of input formats for use with high-order simulations. A number of examples in various application areas are presented, with a particular emphasis on challenging aeronautical and fluid dynamics test cases. Program summary: Program title: NekMesh (version 5.4.0) CPC Library link to program files: https://doi.org/10.17632/d82hjm4v6r.1 Licensing provisions: MIT Programming language: C++ External routines/libraries: Boost, TinyXML, OpenCASCADE, Triangle, TetGen, HDF5 Nature of problem: NekMesh is a high-order mesh generation framework with the goal of providing a robust framework to automate the process of generating valid meshes for complex three-dimensional CAD geometries. Solution method: Energy minimisation, solid body models and other techniques based around high-order finite element methods. Additional comments including restrictions and unusual features: The supplied cases require a system with 16384 MB of RAM for the automotive example and 32768 MB of RAM for the variational optimisation example.
UR - http://www.scopus.com/inward/record.url?scp=85184042005&partnerID=8YFLogxK
U2 - 10.1016/j.cpc.2024.109089
DO - 10.1016/j.cpc.2024.109089
M3 - Article
SN - 0010-4655
VL - 298
SP - 109089
JO - COMPUTER PHYSICS COMMUNICATIONS
JF - COMPUTER PHYSICS COMMUNICATIONS
M1 - 109089
ER -