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Wave-current Interaction (WEC) in the COAWST Modeling System

Wave-current Interaction (WEC) in the COAWST Modeling System. Nirnimesh Kumar with John Warner, George Voulgaris, Maitane Olabarrieta. *see Kumar et al., 2012 (third paper in your booklet) :

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Wave-current Interaction (WEC) in the COAWST Modeling System

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  1. Wave-current Interaction (WEC) in the COAWST Modeling System Nirnimesh Kumar with John Warner, George Voulgaris, Maitane Olabarrieta *see Kumar et al., 2012 (third paper in your booklet) : Implementation of the vortex force formalism in the coupled ocean-atmosphere-wave-sediment transport (COAWST) modeling system for inner shelf and surf zone applications, Ocean Modelling, Volume 47, 2012, Pages 65-95, 10.1016/j.ocemod.2012.01.003. *also see Olabarrieta et al., 2012 (fourth paper for applications)

  2. Wave-averaged Equations

  3. Exchange of Data Field http://woodshole.er.usgs.gov/operations/modeling/COAWST/index.html

  4. Wave-current Interaction (WEC) WEC_MELLOR (Mellor, 2011) WEC_VF (Uchiyama et al., 10) Implemented in Kumar et al., 2011 + Dissipation (depth) + Roller Model + Wave mixing + Streaming Implemented in Kumar et al., 2012 + Roller Model + Streaming *Processes in italics are optional

  5. Shoreface Test Case (Obliquely incident waves on a planar beach) Hsig= 2m Tp = 10s θ = 10o [0,0] z y x [1000,-12] • Wave field computed using SWAN • One way coupling (only WEC) • Application Name: SHOREFACE • Header file: COAWST/ROMS/Include/shoreface.h • Input file: COAWST/ROMS/External/ocean_shoreface.in

  6. Header File (COAWST/ROMS/Include)

  7. Input File (COAWST/ROMS/External)

  8. Input File (COAWST/ROMS/External) Requires a wave forcing file as one way coupling only

  9. WEC Related Output Dissip_roller / Eqn. 37 rollA / Eqn. 35 Zetaw / Eqn. 7 qsp / Eqn. 9 bh / Eqn. 5

  10. Code Compilation:coawst.bash • Application Name • Number of Nested Grids • ROOT and Project Directory • Define Message Passage Interface (MPI), Fortran Compiler, NETCDF4 • Header (*.h) & • Analytical (ana_*.h) • Files ./coawst.bash –j N

  11. Running the Shoreface Test Case np = number of processors coawstM = Executable created after compilation Input file = ROMS/External/ocean_shoreface.in Serial ./coawstS.exe ROMS/External/ocean_shoreface.in Parallel mpiexec/run -np 4 ./coawstM.exe ROMS/External/ocean_shoreface.in

  12. Results (I of III) Significant Wave Height Sea surface elevation

  13. Results (II of III) Depth-averaged Velocities Cross-shore Vel. Longshore Vel.

  14. Results (III of III) Eulerian Stokes Cross-shore Longshore Vertical

  15. WEC related Diagnostics Terms(i.e., contribution to momentum balance)

  16. Inlet Test Case (WEC in a tidal inlet) • Wave field computed using SWAN • Two way coupling (WEC and CEW) • Application Name: INLET_TEST • Header file: COAWST/Projects/Inlet_test/Coupled/inlet_test.h • Input file: COAWST/Projects/Inlet_test/Coupled/ocean_inlet_test.in • COAWST/Projects/Inlet_test/Coupled/swan_inlet_test.in • COAWST/Projects/Inlet_test/Coupled/coupling_inlet_test.h NORTH SOUTH

  17. Header File (COAWST/Projects/Inlet_test/Coupled)

  18. Input File (COAWST/Projects/Coupled/ocean_inlet_test.in ROMS/Functionals/ana_fsobc.h

  19. Input File (COAWST/Projects/Coupled/swan_inlet_test.in INRHOG should be 1 for correct units of wave dissipation Example of TEST Command TEST 120 {} TEST 0

  20. Input File (COAWST/Projects/Coupled/swan_inlet_test.in

  21. Input File (COAWST/Projects/Coupled/coupling_inlet_test.in

  22. Code Compilation:coawst.bash ./coawst.bash –j N

  23. Running the Inlet_Test Case np = number of processors coawstM = Executable created after compilation Input file = Projects/Inlet_Test/Coupled/coupling_inlet_test.in Serial ./coawstS.exe Projects/Inlet_test/Coupled/coupling_inlet_test.in Parallel mpiexec/run -np 4 ./coawstM.exe Projects/Inlet_test/Coupled/coupling_inlet_test.in

  24. Results Hsig

  25. References Kumar et al., 2012: Implementation of the vortex force formalism in the coupled ocean-atmosphere-wave-sediment transport (COAWST) modeling system for inner shelf and surf zone applications, Ocean Modelling, Volume 47, 2012, Pages 65-95, 10.1016/j.ocemod.2012.01.003. Kumar et al., 2011: Implementation and modification of a three-dimensional radiation stress formulation for surf zone and rip-current applications, Coastal Engineering, Volume 58, Issue 12, December 2011, Pages 1097-1117, 10.1016/j.coastaleng.2011.06.009. Olabarrieta, M., J. C. Warner, and N. Kumar (2011), Wave-current interaction in Willapa Bay, J. Geophys. Res., 116, C12014, doi:10.1029/2011JC007387. Warner et al., 2008: Development of a three-dimensional, regional, coupled wave, current, and sediment-transport model, Computers & Geosciences, Volume 34, Issue 10, October 2008, Pages 1284-1306, ISSN 0098-3004, 10.1016/j.cageo.2008.02.012. Haas and Warner, 2009: Comparing a quasi-3D to a full 3D nearshore circulation model: SHORECIRC and ROMS, Ocean Modelling, Volume 26, Issues 1–2, 2009, Pages 91-103, ISSN 1463-5003, 10.1016/j.ocemod.2008.09.003.

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