exasim-project/NeoFOAM
Nov 2024 – Jun 2025
8 Months active
Languages Used
C++CMakecmakePythonRSTreStructuredTextGit Configuration
Technical Skills
API DesignBuild SystemBuild System ManagementC++C++ DevelopmentData Management
Henning Scheufler
PROFILE
Henning Scheufler
Henning Scheufler developed core numerical and API infrastructure for the exasim-project/NeoFOAM repository, focusing on scalable finite volume methods and robust operator design. He modernized the codebase by introducing templated operators, type-erased collections, and modular database-backed field management, leveraging C++ and CUDA for high-performance CPU/GPU execution. His work included implementing Laplacian and divergence operators with boundary condition integration, enhancing DSL expressiveness, and improving solver stability through memory management and error handling. By refactoring APIs, optimizing build systems with CMake, and expanding test coverage, Henning delivered a maintainable, extensible platform that supports advanced computational fluid dynamics and scalable scientific simulations.
Overall Statistics
Feature vs Bugs
54%Features
Repository Contributions
215Total
Bugs
66
Commits
215
Features
78
Lines of code
18,324
Activity Months8
Your Network
14 people
Work History
June 2025
1 Commits
Jun 1, 2025June 2025: Focused on stability and compiler compatibility for NeoFOAM core classes. Delivered resource-management improvements by adding destructors to key core components and aligning with clang-18 expectations to prevent build-time and runtime issues.
1 Commits
Jun 1, 2025June 2025: Focused on stability and compiler compatibility for NeoFOAM core classes. Delivered resource-management improvements by adding destructors to key core components and aligning with clang-18 expectations to prevent build-time and runtime issues.
June 2025
May 2025
11 Commits • 3 Features
May 1, 2025May 2025 performance for exasim-project/NeoFOAM focused on GPU stability, boundary-condition robustness, interpolation accuracy, API usability, and maintainability. Delivered significant fixes and enhancements across GPU execution, divergence handling, and time-integration workflows, improving numerical stability, scalability, and developer productivity for ongoing simulations.
May 2025
11 Commits • 3 Features
May 1, 2025May 2025 performance for exasim-project/NeoFOAM focused on GPU stability, boundary-condition robustness, interpolation accuracy, API usability, and maintainability. Delivered significant fixes and enhancements across GPU execution, divergence handling, and time-integration workflows, improving numerical stability, scalability, and developer productivity for ongoing simulations.
April 2025
7 Commits • 3 Features
Apr 1, 2025April 2025 — exasim-project/NeoFOAM: delivered robust numerical operators, solver stability improvements, and DSL enhancements that boost accuracy and performance across simulations. Key outcomes include new Gauss–Green Laplacian operator returning a VolumeField, an explicit Laplacian operator in NeoN DSL, and a set of targeted bug fixes that improve correctness, robustness, and setup performance.
7 Commits • 3 Features
Apr 1, 2025April 2025 — exasim-project/NeoFOAM: delivered robust numerical operators, solver stability improvements, and DSL enhancements that boost accuracy and performance across simulations. Key outcomes include new Gauss–Green Laplacian operator returning a VolumeField, an explicit Laplacian operator in NeoN DSL, and a set of targeted bug fixes that improve correctness, robustness, and setup performance.
April 2025
March 2025
52 Commits • 17 Features
Mar 1, 2025March 2025 (2025-03) focused on enabling generic templating for operators and expressions, expanding cross-type validation, and strengthening reliability and build integration in NeoFOAM. Delivered templated ValueType support across Operator and Expression, extended GaussGreen/Laplacian operators for templated types, and introduced robust test coverage across scalar and vector types. Strengthened build and runtime correctness with DDT operator integration and custom function dispatch. Implemented surface and source term support, including surfaceInterpolation, GaussGreen field outputs, and boundary contributions. Addressed key stability bugs (std::format in logBadAnyCast, tests aligned with new FVCC/Expression API, scaleField value corrected from 2.0 to 4.0, GPU/type-traits compilation fixes, boundaryFields construction), improving overall robustness and maintainability. These efforts improve multi-physics accuracy, reduce risk in production simulations, and accelerate future feature work.
March 2025
52 Commits • 17 Features
Mar 1, 2025March 2025 (2025-03) focused on enabling generic templating for operators and expressions, expanding cross-type validation, and strengthening reliability and build integration in NeoFOAM. Delivered templated ValueType support across Operator and Expression, extended GaussGreen/Laplacian operators for templated types, and introduced robust test coverage across scalar and vector types. Strengthened build and runtime correctness with DDT operator integration and custom function dispatch. Implemented surface and source term support, including surfaceInterpolation, GaussGreen field outputs, and boundary contributions. Addressed key stability bugs (std::format in logBadAnyCast, tests aligned with new FVCC/Expression API, scaleField value corrected from 2.0 to 4.0, GPU/type-traits compilation fixes, boundaryFields construction), improving overall robustness and maintainability. These efforts improve multi-physics accuracy, reduce risk in production simulations, and accelerate future feature work.
February 2025
46 Commits • 25 Features
Feb 1, 2025February 2025: NeoFOAM delivered broad API modernization, core numerical enhancements, and stability improvements across the exasim-project/NeoFOAM repository. Key features delivered include API modernization replacing Operator with SpatialOperator/TemporalOperator, introduction of Operator::Type, API surface changes for ddtOperator expressions, and renaming fvcc::linearSystem to fvcc::Expression with matrix conversion; addition of SpatialOperator for setReferenceValue and the SurfaceIntegrate Operator. Core math and operator developments include a Laplacian operator with implicit variant and boundary-condition integration, implicit GaussGreenDiv operator, and enabling solving expressions with Ginkgo along with GinkgoMatrix conversion. DSL and operator-expression enhancements include next/token consumption semantics, dynamic upwind handling, SegmentedField enhancements, and Ginkgo-based expression evaluation improvements. Quality and maintainability improvements include consolidating getGkoExecutor and utilities into source files, file renaming for naming consistency, default constructors and out-of-range checks, removal of unused return statements, and updated changelogs. These efforts collectively improve business value by enabling more expressive, reliable operator expressions, faster feature delivery, and a stronger foundation for future physics (DDT, surface integration, reference values) while reducing maintenance burden.
46 Commits • 25 Features
Feb 1, 2025February 2025: NeoFOAM delivered broad API modernization, core numerical enhancements, and stability improvements across the exasim-project/NeoFOAM repository. Key features delivered include API modernization replacing Operator with SpatialOperator/TemporalOperator, introduction of Operator::Type, API surface changes for ddtOperator expressions, and renaming fvcc::linearSystem to fvcc::Expression with matrix conversion; addition of SpatialOperator for setReferenceValue and the SurfaceIntegrate Operator. Core math and operator developments include a Laplacian operator with implicit variant and boundary-condition integration, implicit GaussGreenDiv operator, and enabling solving expressions with Ginkgo along with GinkgoMatrix conversion. DSL and operator-expression enhancements include next/token consumption semantics, dynamic upwind handling, SegmentedField enhancements, and Ginkgo-based expression evaluation improvements. Quality and maintainability improvements include consolidating getGkoExecutor and utilities into source files, file renaming for naming consistency, default constructors and out-of-range checks, removal of unused return statements, and updated changelogs. These efforts collectively improve business value by enabling more expressive, reliable operator expressions, faster feature delivery, and a stronger foundation for future physics (DDT, surface integration, reference values) while reducing maintenance burden.
February 2025
January 2025
30 Commits • 7 Features
Jan 1, 2025January 2025 monthly summary for exasim-project/NeoFOAM: Delivered API refactoring and sparsity-aware enhancements that streamline integration, improve stability, and enable scalable simulations. Focused on business value by simplifying the API, strengthening correctness, and laying groundwork for performance-oriented linear algebra kernels. Comprehensive documentation and build/config improvements reduced onboarding time and ensured reliable deployments.
January 2025
30 Commits • 7 Features
Jan 1, 2025January 2025 monthly summary for exasim-project/NeoFOAM: Delivered API refactoring and sparsity-aware enhancements that streamline integration, improve stability, and enable scalable simulations. Focused on business value by simplifying the API, strengthening correctness, and laying groundwork for performance-oriented linear algebra kernels. Comprehensive documentation and build/config improvements reduced onboarding time and ensured reliable deployments.
December 2024
53 Commits • 15 Features
Dec 1, 2024December 2024: NeoFOAM progression focused on API polish, data-model modernization, and reliability enhancements. Key features delivered include: 1) DiVOperator core base class and operator construction from TokenList and Dictionary, enabling flexible runtime composition. 2) Database structure reorganized into a dedicated database module layout with integration of OldTime collection usage, plus related function renames and documentation updates. 3) Segmented Field support introduced, including Segment class and segmentedFieldView, enabling efficient representation for vectors of vectors. 4) Operator construction/build improvements and API usability enhancements: operators from free functions, solve builds operators, and coeff/operator split into separate source files; new constructor overloads and improved error handling. 5) Documentation refresh across database/modules and geoFields, with comprehensive docstrings and updated examples; continued documentation upkeep. 6) Performance/architecture groundwork: parallelScan, CSR/COO storage groundwork, and refinements to field registration and build flow that set the stage for scalable solvers. Major bugs fixed and quality improvements include: cleanup of legacy patterns (removal of using key = std::string); clang-16 template argument deduction fixes; formatting fixes; VolumeField creation initialization fix; ForwardEuler instantiation correction; time integration field registration fix; hard-coded source field size generalization; sign convention fixes for Runge-Kutta, Sundials integration tweaks; deleter improvements (missing/default/deleter and explicit RK memory deleter) and related memory safety improvements (AddressSanitizer); Clang-Tidy and build hygiene improvements; mermaid diagram rendering fix; DSL data refresh patches; CUDA device memory access fixes. Overall impact and accomplishments: established a more modular, maintainable codebase with stronger data modeling, safer memory handling, and improved usability, positioning the project for reliable large-scale simulations and easier onboarding of new contributors. Business value: faster feature delivery cycles, reduced integration risk, and clearer pathways to solver integrations and performance optimizations. Technologies/skills demonstrated: modern C++ patterns and templating, modular architecture, memory management and safety (AddressSanitizer, deleter lifecycle), CUDA memory considerations, documentation discipline, and robust build/tests hygiene.
53 Commits • 15 Features
Dec 1, 2024December 2024: NeoFOAM progression focused on API polish, data-model modernization, and reliability enhancements. Key features delivered include: 1) DiVOperator core base class and operator construction from TokenList and Dictionary, enabling flexible runtime composition. 2) Database structure reorganized into a dedicated database module layout with integration of OldTime collection usage, plus related function renames and documentation updates. 3) Segmented Field support introduced, including Segment class and segmentedFieldView, enabling efficient representation for vectors of vectors. 4) Operator construction/build improvements and API usability enhancements: operators from free functions, solve builds operators, and coeff/operator split into separate source files; new constructor overloads and improved error handling. 5) Documentation refresh across database/modules and geoFields, with comprehensive docstrings and updated examples; continued documentation upkeep. 6) Performance/architecture groundwork: parallelScan, CSR/COO storage groundwork, and refinements to field registration and build flow that set the stage for scalable solvers. Major bugs fixed and quality improvements include: cleanup of legacy patterns (removal of using key = std::string); clang-16 template argument deduction fixes; formatting fixes; VolumeField creation initialization fix; ForwardEuler instantiation correction; time integration field registration fix; hard-coded source field size generalization; sign convention fixes for Runge-Kutta, Sundials integration tweaks; deleter improvements (missing/default/deleter and explicit RK memory deleter) and related memory safety improvements (AddressSanitizer); Clang-Tidy and build hygiene improvements; mermaid diagram rendering fix; DSL data refresh patches; CUDA device memory access fixes. Overall impact and accomplishments: established a more modular, maintainable codebase with stronger data modeling, safer memory handling, and improved usability, positioning the project for reliable large-scale simulations and easier onboarding of new contributors. Business value: faster feature delivery cycles, reduced integration risk, and clearer pathways to solver integrations and performance optimizations. Technologies/skills demonstrated: modern C++ patterns and templating, modular architecture, memory management and safety (AddressSanitizer, deleter lifecycle), CUDA memory considerations, documentation discipline, and robust build/tests hygiene.
December 2024
November 2024
15 Commits • 8 Features
Nov 1, 2024Concise monthly summary for 2024-11 focusing on delivered features, major fixes, impact, and skills demonstrated. Highlights include a database-backed VolumeField, a refactor of NeoFOAM to store collection pointers with bidirectional db references, dynamic field creation via FieldCollection using Functors, time-aware data support with OldTime integration, and a type-erased collection interface with expanded CPU/GPU test coverage and build-system hardening.
November 2024
15 Commits • 8 Features
Nov 1, 2024Concise monthly summary for 2024-11 focusing on delivered features, major fixes, impact, and skills demonstrated. Highlights include a database-backed VolumeField, a refactor of NeoFOAM to store collection pointers with bidirectional db references, dynamic field creation via FieldCollection using Functors, time-aware data support with OldTime integration, and a type-erased collection interface with expanded CPU/GPU test coverage and build-system hardening.
Activity
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Quality Metrics
Correctness89.6%
Maintainability89.2%
Architecture88.2%
Performance80.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++CMakeGit ConfigurationPythonRSTcmakereStructuredText
Technical Skills
API DesignAlgorithm DesignAlgorithm DevelopmentAlgorithm OptimizationBoundary ConditionsBuild SystemBuild System ConfigurationBuild System ManagementBuild SystemsC++C++ DevelopmentC++ Template MetaprogrammingC++ Template ProgrammingC++ TemplatesCFD
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