ERDC/CHL CHETN-I-68

March 2004

Figure 1.

Example of a CGWAVE model domain

CGWAVE accepts arbitrary domains (Figure 1) and structures using linear triangular finite elements.

The large number of discretized equations is solved with iterative and direct solvers as a steady state

problem. Convergence is guaranteed, but can be extremely slow on PC's with large model domains.

The ERDC High Performance Computing Center's (HPC) supercomputers can be used to quickly

solve large problems. Currently, the Silicon Graphics, Inc. (SGI) solver available on the SGI Origin

3000 supercomputer named "Ruby" provides reasonably fast run times with CGWAVE. The model

output is then transferred back to the PC for post-processing.

Both regular and spectral waves can be input. Spectral or irregular waves can be simulated by

combining regular wave cases. The wave direction is the direction the waves travel to and is

measured positive in a counterclockwise direction from east (i.e., 0 deg). Short and long waves,

including tsunamis, can be modeled.

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