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Hydro2de
is a grid based flow model for the simulation of two-dimensional free
surface
flows. It lets you exploit the full information of topographical data.
Thus it is an ideal complement to a Digital-Terrain-Model (DTM). The
program
has modules for the generation of input files, advanced graphical
output
routines and it can be used in combination with Geographical
Information
Systems (GIS).
Hydro2de has been
proven to
be successful in a number of practical applications:
dam break simulations
flood modelling surge
waves and bores flows
around obstacles / separations
standing waves / hydraulic jumps
flows in compound and braided channels
transport of sediments and drift-material
Main Features
based on the shallow water equations in conservation form
numerically
stable in the presence of steep slopes (sub- and supercritical flow,
hydraulic
jumps)
models wetting and drying process
(allowing dry starts and moveable boundaries)
animated graphical output for intuitive
analysis of complex flows
The depth-averaged
shallow water
equations describe the flow field over moderate slopes where the
pressure
distribution is approximately hydrostatic. A conservation form is used
that remains valid in the presence of shocks (e.g. hydraulic jumps).
The
numerical method is based on an explicit cell-centred finite volume
scheme
(flux difference splitting according to Roe). The spatial accuracy is
of
2nd order which allows for simulation of short waves or dam break waves
with steep fronts. Lateral momentum transfer is considered with zero-
and
one-equation turbulence models.
Input / Output Features
generation of calculation grid with Fluviz xy-plots
and vectors contourlines
and -plots (b/w, coloured) animated
graphics (vectors, contours, 3d) drivers
for X11, PostScript ASCII
tables hydrographs
and statistical functions interface
to GIS
DXF and ArcGenerate hardcopy