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DSD-INT 2018 Delft3D FM - validation of hydrodynamics (2D,3D) - De Goede

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Presentation by Erik de Goede, Deltares, The Netherlands, at the Delft3D - User Days (Day 2: Hydrodynamics), during Delft Software Days - Edition 2018. Tuesday, 13 November 2018, Delft.

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DSD-INT 2018 Delft3D FM - validation of hydrodynamics (2D,3D) - De Goede

  1. 1. Delft3D Flexible Mesh Validation of hydrodynamics; in 2D and 3D Erik de Goede and many colleagues Delft Software Days – Edition 2018
  2. 2. Contributors
  3. 3. Validation of computational kernels in 2018 Focus on: • Morphology and waves: • Presentation of Ap van Dongeren on Wednesday, 14 November 2018, on “Implementation and verification of 2D coastal morphodynamic module in Delft3D FM” • Hands-on workshops: • River morphodynamic modelling: Willem Ottevanger • Coastal morphodynamic modelling: Björn Röpke • Wave modelling: Joana van Nieuwkoop • Reservoir sedimentation modelling: Sanjay Giri and Amgad Omer • Water quality • Presentation of Arjen Markus on Thursday, 15 November 2018, Delft3D – User Days (Day 4: Water quality and ecology)
  4. 4. Purpose of validation The purpose of validation is two-fold: 1. Assess the quality of results 2. Check the consistency of results
  5. 5. Validation of Delft3D Flexible Mesh Test bench Current statusValidation cases
  6. 6. Validation case 14.3: Californian coast
  7. 7. Regression tests (for consistency) • Currently 350 testcases for D-Flow FM stand-alone, checked automatically • Small, fast tests: Average runtime of 21.6 seconds per testcase • Testset runs at least once a day, but typically four times (each commit) • All 346 D-Flow FM stand-alone testruns are successful
  8. 8. Overview of some Delft3D FM test benches About 600 testruns Both on Windows and Linux
  9. 9. Helpdesk; first-line and second-line support Number of open helpdesk questions are shown Quick response!
  10. 10. Tidal Flume (Laboratory case)
  11. 11. Tidal flume experiment (originally 130 m)
  12. 12. Tidal flume experiment
  13. 13. Tidal flumeexperiment
  14. 14. Tidal flume experiment; bottom salinity at 24 m
  15. 15. Tidal flume experiment; surface salinity at 24 m
  16. 16. San Francisco Bay Real-world
  17. 17. San Francisco Bay; two publications
  18. 18. San Francisco Bay (2)
  19. 19. San Francisco Bay (3)
  20. 20. San Francisco Bay (4) Red=Measurements; Blue = Model Mean annual stratification and standard deviation
  21. 21. Lake Grevelingen Real-world
  22. 22. Lake Grevelingen Weakly dynamic system, salinity and temperature stratification 3D z-layers in D-Flow FM, heat fluxes, rainfall, evaporation
  23. 23. Lake Grevelingen: measurements
  24. 24. Delft3D-FLOW curvilinear grid
  25. 25. D-Flow FM network with “perfect” triangles
  26. 26. 2x oscillations
  27. 27. Tidal turbine currents; standard D-Flow FM scheme
  28. 28. Tidal turbine; D-Flow FM scheme + 2nd order filter
  29. 29. Validation; current status per november 2018 • Extensive validation for 2D modelling: • D-Flow FM • D-Water Quality • D-Morphology • D-Waves • Limited validation for 3D modelling (D-Flow FM)
  30. 30. Validation; current status per november 2018 Further validation needed for: • 1D modelling • 1D2D modelling • 3D modelling • Combination with D-Real Time Control (steering of barriers) • … • Validation never stops, as well as testing (test benches, ..) and documentation
  31. 31. 6.000+ Delft3D papers (see oss.delft3d.nl), but no overview paper of key features “Fifty years of 2-D and 3-D hydrodynamic modelling for shallow water flows in The Netherlands (1967-2017); overview and milestones” (Hopefully) to appear in Ocean Dynamics in 2019 To appear: Overview paper on shallow water flows in The Netherlands

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