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Introduction
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swantech
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The QC approximation
Numerical approaches
Subsections
Introduction
Discretization
Discretization in geographical space
Note on the choice of geographic propagation schemes
Discretization in spectral space
Conservative elimination of negative energy densities
Solution algorithm
Iteration process and stopping criteria
An illustrative explanation of the sweeping approach
Implementation of DIA within the four-sweep technique
Action density limiter and under-relaxation
Introduction
Convergence-enhancing measures
On the approximation of refraction in large-scale SWAN applications
Introduction
Energy transport along wave rays
The problem with refraction in non-stationary applications
A historical overview of limitation on
The problem with refraction on coarse grids
Implementation of QC approximation
Governing equations in curvilinear co-ordinates
Computation of force in curvilinear co-ordinates
Numerical treatment of obstacles
Crossing of obstacle and grid line
Integration over
Transformation from relative to absolute frequency
Interpolation of spectra
Computation of breaking source term
The SWAN team 2026-03-13
