Swan Support Package
The dedicated post-processing package OPGraph enables SWAN users
to present results of a SWAN computation together
with measured data, results from other SWAN computations and results
from other wave models.
a post-processing package for SWAN
The Swan Support Package contains an executable OPGraph program,
but only for single-processor execution on the Windows platform.
Users who need a version for Unix or a multi-processor version, can contact us
to obtain the source code of OPGraph.
It is appreciated if such users make their executable available to others.
OPGraph accepts tables in various formats, among them
the 1-d and 2-d spectral files produced by SWAN.
This enables SWAN users to make pictures of
source terms. This is essential for wave researchers but also for
model engineers who need detailed insight into the physics in order
to explain why certain results were obtained.
Since many different formats are accepted by OPGraph observed values can easily
be included in the graphs showing SWAN results.
OPGraph also shows 2-d spectra in colored graphs.
The figure shows a spectrum of the quadruplet interaction term in
one of the locations in the Haringvliet area.
SWAN itself can produce similar pictures of the spectral energy
density, but OPGraph can also make them for source terms thus
enabling the user to get deeper insight in the physics.
OPGraph uses as input the output of source terms that SWAN-DHH
can make for test points.
OPGraph is able to use logarithmic axes, and it allows the user to
add various kinds of texts. It has a powerful mechanism to repeat
codes if more than one similar quantities have to be shown.
OPGraph not only makes graphs of quantities read directly from files; it
can also make calculations with these quantities.
Expressions in OPGraph can involve the usual algebraic operations, but also
many transcendental functions.
Users can generate analytical solutions to compare numerical results with,
or they can make graphs of e.g. the difference between two numerical results.
Swan Support Package
The SWAN course is delivered together with the Graphical User Interface for SWAN,
the newest SWAN version with graphics extension and OPGraph.
This package is available free of charge; please fill in the
The package is available only for MS-Windows based systems.
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