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| [[Category: Mathematical Models]] | | [[de:Vertical Velocity Profile]] |
| [[de: Mathematisches Verfahren TRIM-2D]] | | Author: [mailto:peter.schade@baw.de P. Schade] |
| ==Short Description==
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| The mathematical model TRIM-2D is based on the finite difference method. TRIM-2D was designed to solve several depth-integrated transient nonlinear partial differential equations (pde's). The model is actually used to study one ore more of the following physical processes:
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| # transport of water (conservation of the water mass)
| | [[Information about the Vertical Velocity Profile|Information about the Vertical Velocity Profile Applet]] (only in english) |
| # transport of linear momentum (conservation of linear momentum)
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| # transport of salinity (conservation of the dissolved salt mass)
| | <java_applet CODE=de.baw.hamburg.velocityprofile.VApplet.class height="420" width="740" archive="http://www.baw.de/downloads/wasserbau/mathematische_verfahren/java/VProfileGraph.jar" /> |
| # transport of suspended sediments with consideration of resuspension and deposition at the bottom (conservation of the suspended sediment mass)
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| # bed load transport (a transport capacity approach is used)
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| # evolution of the bottom (morphodynamics) due to suspended load as well as bed load transport
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| TRIM-2D was jointly developed by Prof. V. Casulli (Trento University, Italy) as well as Prof. R. T. Cheng (US Geological Survey, Menlo Park, California). In the framework of a scientific cooperation TRIM-2D has been successfully installed in the year 1994 at BAW-DHs computers. It has been integrated into BAW-DHs numerical modelling toolbox and is now used on a routine basis in the context of different real-world projects concerning estuarine flow and transport processes. Meanwhile the capabilities of the model were extended and new physical processes have been included.
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| Furthermore the program was parallelized using [http://openmp.org/wp/ OpenMP]-directives for SMP ([http://burks.brighton.ac.uk/burks/foldoc/5/114.htm symmetric multiprocessing]) systems in a portable way.
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| ==Standard Validation Document==
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| There exists a Standard Validation Document (in German only) for TRIM-2D which provides the potential user with information about the capabilities and limitations of the model. This document may be downloaded either as [http://www.baw.de/downloads/wasserbau//mathematische_verfahren/Modellverfahren/pdf/trim2d1.pdf PDF-Version] ( 2.1M) or as a compressed PostScript-Version ( 2.9M).
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| ==Preprocessors==
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| * [[Generation of Boundary Conditions]]
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| * [[Generation and Modification of Computational Grids]]
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| ==Programs for Simulations==
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| * [[TR2VOR]]: generation of a compact version of the bathymetry-file together with some index arrays which are required during the simulation run for optimal performance on vector computers
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| * [[TR2LQ2]]: generation of a profile topography which is necessary to output results from a TRIM-2D simulation run along profiles
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| * [[TRIM-2D]]: simulation run
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| ==Postprocessors==
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| * [[Conversion of Computed Results]]: general purpose prostprocessors for the conversion of data.
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| * [[Analysis of Calculated Results]]: tidal characteristic numbers, tide-independent characteristic numbers, tidal harmonic analysis and comparative analysis.
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| * [[EXCEL-Applications|Spread-Sheet Calculations for Computed Results]]: application of the spread-sheet program MS Excel (TM) to display and modify computed results.
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| * [[TR2MODATE]]: modification of date and time in a hydrodynamic results file if this hydrodynamic state should be used as initial state for a different date
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| * [[TR2KACHEL]]: generation of sections (tiles); topography as well as data are cut into pieces out of the result files for the entire computational domain for any desired section (tile)
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| * [[PARTRACE]]: particle tracking within a two-dimensional depth-averaged velocity field
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| * [[GVIEW2D]]: graphical display of time series at selected locations
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| * [[LQ2PRO]]: Visualization of data along profiles
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| * [[HVIEW2D]]: graphical display of 2D synoptic or data analyses results
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| * [[VVIEW2D]]: Two-dimensional graphical representation of CFD-data for vertical sections
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| ==Example Applications==
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| * [[Hydrodynamics of the Elbe Estuary]]: A comprehensive study concerning hydrodynamics, salt- and bedload transport in the Elbe Estuary.
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| * Suspended Sediment Transport: Demo-Example (available in German only).
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| * [[Example: Animation of Salinity in the Außenweser Estuary|Animation of tidal variability of salinity in the Außenweser Estuary]].
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| * [[Animation of Water Level Elevation and Flow Velocity in the Inner Jade Estuary]].
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| * [[Tidal characteristic numbers of current velocity for the Weser Estuary]].
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| * [[Tidal characteristic numbers of salinity for the Weser Estuary]].
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| * Modeling the propagation of dunes in a straight channel (available in German only).
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| * [[Animation of vortex streets behind a planned storm surge barrier in the Unterems]].
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| ---- | | ---- |
| back to [[Mathematical Models for Coastal Areas and Estuaries]] | | back to [[Tools for Hydraulic Engineering]] |
| ---- | | ---- |
| [[Overview]] | | [[Overview]] |
