DSD-INT 2025 MeshKernel and D-Grid Editor - Stout

DSD-INT 2025 MeshKernel and D-Grid Editor - Stout

• 1.
  Generation of unstructuredgrids for Rivers, Coastal Seas, Coastal Infrastructure and Rural applications 11/11/2025 D-Grid Editor / MeshKernel
• 2.
  Programme 2 • Overview • Architectureand way of use • Toolbars • Algorithms • Advantages • Why we started this development ? • Development history • MeshKernelPy • Creating meshes using Python • Examples • Demo D-Grid Editor • Creating a simple river mesh • User Manual / Tutorials • Release schedule
• 3.
  D-Grid Editor: Architectureand way of use 3 MeshKernel Grid Editor stad-alone Delft3D FM Suite 1D2D Delft3D FM Suite 2D3D MeshKernel MeshKernelNET Computation core .NET wrapper GUI GUI GUI D-Grid Editor (stand-alone)
• 4.
  D-Grid Editor: Architectureand way of use 4 MeshKernel MeshKernel MeshKernelPy Grid Editor stad-alone Delft3D FM Suite 1D2D Delft3D FM Suite 2D3D MeshKernel MeshKernelNET HYDROLIB D-HyDAMO DFM_Tools HydroMT- Delft3DFM Computation core Python package (Python wrapper) .NET wrapper GUI GUI GUI Model generation tools & pre- and post- processing D-Grid Editor (stand-alone)
• 5.
  D-Grid Editor: Toolbars(ribbon) 5
• 6.
  D-Grid Editor: Curvilineargrid algorithms • Generation from splines using transfinite interpolation • Generation from splines using the advancing front method • Grid smoothing and orthogonalization (making the angles as square as possible) • Refinement and de-refinement: adding and removing grid lines • Block deletion, adding/deleting faces at the boundary • Generation of a curvilinear mesh in a polygon • Editing splines from corner points n m Generation using transfinite interpolation Generation using the advancing front method Generation within a polygon Curvilinear grid orthogonalization
• 7.
  D-Grid Editor: Unstructuredmesh algorithms • Generation of a triangular mesh in polygon • Mesh topology optimization by flipping the edges • Mesh orthogonalization and smoothing • Mesh refinement based on refinement levels and bathymetric data • Mesh snapping to land boundary • Edge merging for connecting mesh parts • Mesh deletion using several options • Adding and deleting edges Triangular mesh generation Flip the edges Orthogonalization Accurate coastline deletion using mesh topology
• 8.
  MeshKernel: Other algorithms •Polygon refinement • Interpolate samples on mesh locations (node, edge, faces): • Averaging samples with several options • Triangulation
• 9.
  MeshKernel: Other algorithms •Polygon refinement • Interpolate samples on mesh locations (node, edge, faces): • Averaging samples with several options • Triangulation • Compute 1D mesh - 2D mesh links – embedded only: • 1D node to one 2D face • 1D node to multiple 2D faces (canals) • 1D node to polygons (house roofs) • 1D node to boundary 2D faces (rivers) Only used in Delft3D FM Suite 1D2D Mark that D-Grid Editor is limited to 2D mesh generation
• 10.
  D-Grid Editor: Advantages 10 •MeshKernel: one backend containing all in-house developed meshing algorithms, which can serve several clients / operating modes • Can be used to eliminate duplicated implementations (for example gridgeom) • MeshKernelPy: enabling the generation of meshes and curvilinear grids using Python scripting • Automation of mesh generation workflow • D-Grid Editor: • Generating meshes using a map background • Possibility to work with multiple grids • Undo / Redo of meshing operations • Improved user experience
• 11.
  2019: Why westarted? 11 • “Embedding” Mesh editing in Delft3D FM Suite: • Mesh editing available as a separate tab in Delft3D FM Suite 1D2D - not as a separate application (RGFGRID) • Minimize writing the mesh to a file • Improve user experience when editing meshes • Improved ribbon design • Support for multiple instances • Automatic (re)generation of 1D-2D links (on exit of the Edit mode) • Map as background layer • The initial requirement was to support only for 1D2D workflows and unstructured meshes • Generating rectangular meshes • Mesh refinement based on samples
• 12.
  Development history (2019– 2025) • 2019: − First embedded version (in Delft3D FM Suite 1D2D) • 2020-2022: − Hybernating • 2023: − Proof of concept studies • 2024: − Full force development with a dedicated team (4-5 developers) − Focus on the stand-alone application and on MeshKernelPY • 2025: − Evaluation “Fit for use” for Rivers, Coastal Seas, Coastal Infrastructure and Rural applications − (beta) Release 12
• 13.
  MeshKernelPy: creating meshesusing Python 13
• 14.
  MeshKernelPy: Bonaire 14
• 15.
  MeshKernelPy: Global TideSurge Model 15 Disclaimer: NOT (yet) generated with MeshKernelPy
• 16.
  Demo: creating asimple river mesh 16
• 17.
  D-Grid Editor -User Manual 17
• 18.
  Release schedule 18 D-Grid Editorwill be released: • December 2025: • As D-Grid Editor 8.1.4 (beta release) • Spring 2026: • Optional: D-Grid Editor “update” (beta release) • Embedded in Delft3D FM Suite 1D2D 2026.02 • Fall 2026: • As D-Grid Editor (General Availability release) • Embedded in Delft3D FM Suite 1D2D 2027.01 • Optionally: embedded in Delft3D FM Suite 2027.01 Meshkernel(Py) will be released continuously on GitHub: • Deltares/MeshKernel: Deltares C++library for creating and editing meshes. It supports 1D & 2D unstructured meshes as well as curvilinear meshes.
• 19.
  D-Grid Editor isthe grid editor by Deltares 19