## Difference between pages "Tidal Characteristic Numbers of Suspended Sediment Transport" and "Mathematical Model TRIM-2D"

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− | [[ | + | [[Category: Mathematical Models]] |

− | [[de: | + | [[de: Mathematisches Verfahren TRIM-2D]] |

− | + | ==Short Description== | |

− | == | + | 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: |

− | The | ||

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− | + | # transport of water (conservation of the water mass) | |

− | + | # transport of linear momentum (conservation of linear momentum) | |

− | + | # transport of salinity (conservation of the dissolved salt mass) | |

− | + | # transport of suspended sediments with consideration of resuspension and deposition at the bottom (conservation of the suspended sediment mass) | |

− | + | # bed load transport (a transport capacity approach is used) | |

− | + | # 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. | ||

+ | 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. | ||

+ | ==Standard Validation Document== | ||

+ | 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). | ||

+ | ==Preprocessors== | ||

+ | * [[Generation of Boundary Conditions]] | ||

+ | * [[Generation and Modification of Computational Grids]] | ||

+ | ==Programs for Simulations== | ||

+ | * [[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 | ||

+ | * [[TR2LQ2]]: generation of a profile topography which is necessary to output results from a TRIM-2D simulation run along profiles | ||

+ | * [[TRIM-2D]]: simulation run | ||

+ | ==Postprocessors== | ||

+ | * [[Conversion of Computed Results]]: general purpose prostprocessors for the conversion of data. | ||

+ | * [[Analysis of Calculated Results]]: tidal characteristic numbers, tide-independent characteristic numbers, tidal harmonic analysis and comparative analysis. | ||

+ | * [[EXCEL-Applications|Spread-Sheet Calculations for Computed Results]]: application of the spread-sheet program MS Excel (TM) to display and modify computed results. | ||

+ | * [[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 | ||

+ | * [[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) | ||

+ | * [[PARTRACE]]: particle tracking within a two-dimensional depth-averaged velocity field | ||

+ | * [[GVIEW2D]]: graphical display of time series at selected locations | ||

+ | * [[LQ2PRO]]: Visualization of data along profiles | ||

+ | * [[HVIEW2D]]: graphical display of 2D synoptic or data analyses results | ||

+ | * [[VVIEW2D]]: Two-dimensional graphical representation of CFD-data for vertical sections | ||

+ | ==Example Applications== | ||

+ | * [[Hydrodynamics of the Elbe Estuary]]: A comprehensive study concerning hydrodynamics, salt- and bedload transport in the Elbe Estuary. | ||

+ | * [[Suspended Sediment Transport]]: Demo-Example (available in German only). | ||

+ | * [[Animation of tidal variability of salinity in the Außenweser Estuary]]. | ||

+ | * [[Animation of Water Level Elevation and Flow Velocity in the Inner Jade estuary]]. | ||

+ | * [[Tidal characteristic numbers of current velocity for the Weser Estuary]]. | ||

+ | * [[Tidal characteristic numbers of salinity for the Weser Estuary]]. | ||

+ | * [[Modeling the propagation of dunes]] in a straight channel (available in German only). | ||

+ | * [[Animation of vortex streets behind a planned storm surge barrier in the Unterems]]. | ||

---- | ---- | ||

− | back to [[ | + | back to [[Mathematical Models for Coastal Areas and Estuaries]] |

---- | ---- | ||

[[Overview]] | [[Overview]] |

## Revision as of 07:53, 21 June 2010

## Contents

## Short Description

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:

- transport of water (conservation of the water mass)
- transport of linear momentum (conservation of linear momentum)
- transport of salinity (conservation of the dissolved salt mass)
- transport of suspended sediments with consideration of resuspension and deposition at the bottom (conservation of the suspended sediment mass)
- bed load transport (a transport capacity approach is used)
- evolution of the bottom (morphodynamics) due to suspended load as well as bed load transport

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. Furthermore the program was parallelized using OpenMP-directives for SMP (symmetric multiprocessing) systems in a portable way.

## Standard Validation Document

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 PDF-Version ( 2.1M) or as a compressed PostScript-Version ( 2.9M).

## Preprocessors

## Programs for Simulations

- 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
- TR2LQ2: generation of a profile topography which is necessary to output results from a TRIM-2D simulation run along profiles
- TRIM-2D: simulation run

## Postprocessors

- Conversion of Computed Results: general purpose prostprocessors for the conversion of data.
- Analysis of Calculated Results: tidal characteristic numbers, tide-independent characteristic numbers, tidal harmonic analysis and comparative analysis.
- Spread-Sheet Calculations for Computed Results: application of the spread-sheet program MS Excel (TM) to display and modify computed results.
- 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
- 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)
- PARTRACE: particle tracking within a two-dimensional depth-averaged velocity field
- GVIEW2D: graphical display of time series at selected locations
- LQ2PRO: Visualization of data along profiles
- HVIEW2D: graphical display of 2D synoptic or data analyses results
- VVIEW2D: Two-dimensional graphical representation of CFD-data for vertical sections

## Example Applications

- Hydrodynamics of the Elbe Estuary: A comprehensive study concerning hydrodynamics, salt- and bedload transport in the Elbe Estuary.
- Suspended Sediment Transport: Demo-Example (available in German only).
- Animation of tidal variability of salinity in the Außenweser Estuary.
- Animation of Water Level Elevation and Flow Velocity in the Inner Jade estuary.
- Tidal characteristic numbers of current velocity for the Weser Estuary.
- Tidal characteristic numbers of salinity for the Weser Estuary.
- Modeling the propagation of dunes in a straight channel (available in German only).
- Animation of vortex streets behind a planned storm surge barrier in the Unterems.

back to Mathematical Models for Coastal Areas and Estuaries