SRDG April2011
20
Stromness, 27 th February 2011 Dr. Susana Baston Meira IT- International Centre for Island Technolog Heriot-Watt University, Orkney Campus
-
Upload
susana-baston -
Category
Technology
-
view
649 -
download
2
description
Brief description of SUNTANS model implementation to research hydrodynamic characteristic of the Pentland Firth
Transcript of SRDG April2011
Stromness, 27th February 2011
Dr. Susana Baston MeiraICIT- International Centre for Island Technology
Heriot-Watt University, Orkney Campus
Stromness, 27th February 2011
Research Team
Dr Susana Baston Meira, ICIT H-W
Dr Rob Harris, ICIT H-W
Prof Jon Side, ICIT H-W
Dr Karl Stephen, IPE H-W
Prof Margot Gerritsen, Stanford University
Stromness, 27th February 2011
Contents
Introduction to Numerical Flow Modelling
SUNTANS Model description
Implementation at PF & OW
Focus of Present Research
Stromness, 27th February 2011
Introduction to Numerical Flow Models
Description of water column structure
Estimation of energy resource
Evaluation of scales of resolution
Physical environment changes
Shoreline morphodynamic alteration
Larvae and pollutants transport
Of Interest, 2D & 3D models
Stromness, 27th February 2011
Introduction to Numerical Flow Models
Information in z-coordinate3-D Hydrodynamic Models
ADCIRCA (parallel) ADvanced CIRCulation model for Oceanic, Coastal and
Estuarine watershttp://www.unc.edu/ims/adcirc/
COHERENSCOupled Hydrodinamic Ecological model for REgioNal Shelf Seas
http://www.mumm.ac.be/EN/Models/Coherens/index.php
FVCOMFinite Volume Comunnity Ocean Model
http://fvcom.smast.umassd.edu/FVCOM/index.html
MIKE-3Dhttp://mikebydhi.com/Products/CoastAndSea/MIKE3.aspx
POMPrinceton Ocean Model
http://www.aos.princeton.edu/WWWPUBLIC/htdocs.pom/
ROMSRegional Ocean Model System
http://www.myroms.org/
SUNTANSStanford Unstructured Non-hydrostatic Terrain following Adaptive
Navier-Stokes Simulatorhttp://suntans.stanford.edu/
TELEMAC-3Dhttp://www.telemacsystem.com/
Stromness, 27th February 2011
SUNTANS Model: Definition
SUNTANSSUNTANS is a numerical model designed for the
simulation of complex, non-hydrostatic, coastal,
river and estuarine flows, with high resolution on
unstructured grids using parallel computers.
Stromness, 27th February 2011
SUNTANS Model: Primary Publications O. B. Fringer, M. Gerritsen, and R. L. Street, 2006. "An unstructured-grid, finite-volume, nonhydrostatic, parallel coastal-ocean simulator", Ocean Modelling, 14 (3-4), 139-278.
O. B. Fringer, 2009, "High-resolution 3D hydrodynamics and sediment transport modeling of San Francisco Bay“
O. B. Fringer, 2009, "Towards nonhydrostatic ocean modeling with large-eddy simulation“
B. Wang, O. B. Fringer, and E. S. Gross, 2010, "Understanding turbulent mixing in a partially stratified estuary using SUNTANS"
D. Kang and O. B. Fringer, 2010, "On the calculation of available potential energy in internal wave fields", J. Phys. Oceanogr., 40 (11), 2539-2545.
Stromness, 27th February 2011
SUNTANS Model: Why? Open source: Accessible to a wide research community
Three-dimensional approach: Resolves vertical flow characteristics
Unstructured grid: Provides exceptional resolution around fine-scale features
Parallel Implementation: Facilitates high resolution, efficient computational use
Active, developing, research community: H-W links with Stanford University
Stromness, 27th February 2011
SUNTANS Model: Open SourceWhy not Mike-3D?Commercial software
Why not Telemac?Only 2D open source
Why not FVCOM?Non-hydrostatic versionyet to be tested
UnstructuredUnstructured
Stromness, 27th February 2011
SUNTANS Model: UnstructuredUnstructured grid, Terrain-following adaptive
Structured grid Unstructured grid
z-coordinate isopycnalcoordinate
σ-coordinate
Vertical discretisation:
a) z-coordinate models
b) isopycnal models
c) σ-coordinate models
SUNTANS employs a z-level grid
Stromness, 27th February 2011
Fringer, O., McWilliams, J. & Street, R., 2006. A New Hybrid Model for Coastal Simulations. Oceanography, 19(1), 65-77.
SUNTANS Model: Nonhydrostatic
It is ideally suited to modelling regions of high turbulence including density gradients
SUNTANS is Non-hydrostatic
Solves vertical acceleration and friction
Stromness, 27th February 2011
Implementation: PF & OWComputational requirementsModel is installed on the IPE cluster in Edinburgh. It has 10-node of 8 processors. Operating system: Linux
Initial conditions:-- Quiescent free surface and velocity field-- No stratification
Boundary conditions:
They are given by the first eight tidal constituents computed by OTIS
38,342 cells, 20 levels, Δt=2s, Run Time 14 hours, Simulation 3 days, 6 processors
Stromness, 27th February 2011
Implementation: PF & OW
25708 cells, 20 z-levels,
Δt=2s, Run Time 12 hours, Simulation 3 days,
4 processors
Stromness, 27th February 2011
Implementation: PF & OW
38342 cells, 10 levels, Δt=5s, Run Time 1 day, Simulation 10 days, 2 processors
Stromness, 27th February 2011
Implementation: PF & OWPoint 1
Comparison SUNTANS-OTIS
Stromness, 27th February 2011
Implementation: PF & OW
The UKHO provided Gardline with three target locations for the deployments as follows:
SITE LATITUDE LONGITUDE DEPTH TIME DEPLOYED
1 58° 43’ 34”N
003° 14’ 11”W
82 m 12:30 14/09/01
2 58° 43’ 01”N
003° 05’ 09”W
80 m 12:01 14/09/01
3 58° 40’ 13”N
002° 58’ 35”W
71 m 11:35 14/09/01
Data: One month of velocity averagedevery 10 minutes
Stromness, 27th February 2011
Implementation: PF & OW
Stromness, 27th February 2011
Focus of Present Research Development of model, spatial and temporal resolution
Validation against field data / other theoretical models Improved bathymetry Seabed friction coefficient
Identification and Characterisation of PF waters Turbulence, identification of eddies Mixing process, density stratification
Evaluation of energy resource Velocity profile characteristics Energy extraction, available resource, farm size / layout
Environmental impacts Site characteristics, scale, layout, near / far field effects
Stromness, 27th February 2011
