UNTRIM2007
From BAWiki
Basic Information
Name of Program
untrim2007
Version-Date
May 2015
Description-Date
November 2015
Catchwords
numerical simulation
finite difference method
finite volume method
unstructured orthogonal grid
two-dimensional, three-dimensional
unsteady, non-linear
hydrostatic, non-hydrostatic
reynoldsaveraged Navier Stokes equations (RANS)
tidal dynamics (long waves)
transport of conservative substances (salt, temperature, suspended sediments, tracers)
two-equation turbulence modelling
numerical method UNTRIM2007
sub-model for water density EQS
sub-model for mixing length turbulence modelling MIX
sub-model for settling velocity modelling SV
sub-model for morphodynamics SEDIMORPH
sub-model for dredging and disposal DredgeSim
sub-model for short waves K-Model
portable SMP-programming using OpenMP
Acknowledgment: This project took advantage of netCDF software developed by UCAR/Unidata (www.unidata.ucar.edu/software/netcdf/).
Short Description of Functionality
Method
The three-dimensional finite difference / finite volume numerical model UNTRIM2007 can be used to simulate flow and transport processes in different free-surface flow problems. In contrast to conventional finite difference methods UNTRIM2007 is able to operate on an unstructured orthogonal grid.
Physical Processes
The following physical processes are currently taken into account by UnTRIM2007:
- reynoldsaveraged Navier-Stokes equations (RANS)
- local acceleration (inertia)
- advective acceleration
- Coriolis acceleration
- barotropic pressure gradient
- baroclinic pressure gradient
- hydrostatic or non-hydrostatic pressure
- horizontal turbulent viscosity
- vertical turbulent viscosity influenced by density stratification
- bottom friction
- wind friction
- sources and sinks
- bottom evolution
- horizontal acceleration due to wave effects (by means of radiation stress)
- morphodynamic bathymetry
- body forces due to short waves
- transport of substances
- local rate of change of concentration
- advective rate of change of concentration
- optional flux limiter : Minmod, van Leer or Superbee
- horizontal turbulent diffusivity
- vertical turbulent diffusivity influenced by density stratification
- settling of particles, deposition and erosion (for suspended sediments)
- sources and sinks
- sinks with immediate return inflow at a different location, with optional modification of inflow-temperature as well as -salinity
- turbulence modelling
- constant
- mixing length (various parametrizations)
- two-equation model (turbulent kinetic energy, generic length scale)
Primary Computational Results
- free surface elevation
- bottom bathymetry and bed evolution rate
- current velocity
- concentration of substances (salinity, temperature, suspended load, tracers)
- turbulent kinetic energy and turbulent length scale
- hydrodynamic pressure
Input-Files
- general input data (filetype untrim2007.dat)
- all other input data are described in the aforementioned input file as well as in the further used steering files listed there.
- (optional) global metadata (filteype nc_meta.dat). In case file nc_meta.dat is present in the current working directory, this file will be read by the application. Otherwise the respective file from $PROGHOME/cfg will be read.
Output-Files
- all output data files are either described with filteype untrim2007.dat or with all other filteypes used in the aforementioned master input file.
- CF-NETCDF.NC files can be generated optionally.
- printer file with informations on program execution (filetype untrim2007.master.sdr).
- (optional) trace file (filetype untrim2007.trc).
Methodology
-
Program(s) to run before this Program
Program(s) to run after this Program
ABDF, DATACONVERT, DAVIT, DIDAMINTQ, GVIEW2D, HVIEW2D, NCAGGREGATE, NCANALYSE, NCAUTO, NCDELTA, NCPLOT, UNTRIM2007MONITOR, VTDK, VVIEW2D, XTRLQ2, ZEITR
Additional Information
Language
Fortran90
Additional software
-
Original Version
Maintenance
E. Rudolph, A. Sehili, H. Weilbeer
Documentation/Literature
- please refer to $PROGHOME/examples/untrim2007/
back to Program Descriptions