Publication Detail

An Unstructured-grid Finite-volume Surface Wave Model (FVCOM-SWAVE): Implementation, Validations and Applications

Jianhua Qi, Changsheng Chen, Robert C Beardsley, Will Perrie, Geoffrey Cowles, Lai Zhigang
14 pp.
MITSG 09-22J
$5.50 DOM / $7.50 INT

The structured-grid surface wave model SWAN (Simulating Waves Nearshore) has been converted into an unstructured-grid finite-volume version (hereafter referred to as FVCOM-SWAVE) for use in coastal ocean regions with complex irregular geometry. The implementation is made using the Flux-Corrected Transport (FCT) algorithm in frequency space, the implicit Crank–Nicolson method in directional space and options of explicit or implicit second-order upwind finite-volume schemes in geographic space.
FVCOM-SWAVE is validated using four idealized benchmark test problems with emphasis on numerical dispersion, wave-current interactions, wave propagation over a varying-bathymetry shallow water region, and the basic wave grow curves. Results demonstrate that in the rectangular geometric domain, the second-order finite-volume method used in FVCOM-SWAVE has the same accuracy as the third-order finite-difference method used in SWAN. FVCOM-SWAVE was then applied to simulate wind-induced surface waves on the US northeast shelf with a central focus in the Gulf of Maine and New England Shelf. Through improved geometric fitting of the complex irregular coastline, FVCOM-SWAVE was able to robustly capture the spatial and temporal variation of surface waves in both deep and shallow regions along the US northeast coast.

type: Journal, book, proceeding reprints

Parent Project

Project No.: 2006-R/RC-103
Title: Development of a Management Model System for the New England Shelf