FVCOM validation experiments : comparisons with ROMS for three idealized barotropic test problems
Cowles, Geoffrey W.
Winant, Clinton D.
Beardsley, Robert C.
Hedstrom, Kate S.
Haidvogel, Dale B.
MetadataShow full item record
The unstructured-grid Finite-Volume Coastal Ocean Model (FVCOM) is evaluated using three idealized benchmark test problems: the Rossby equatorial soliton, the hydraulic jump, and the three-dimensional barotropic wind-driven basin. These test cases examine the properties of numerical dispersion and damping, the performance of the nonlinear advection scheme for supercritical flow conditions, and the accuracy of the implicit vertical viscosity scheme in barotropic settings, respectively. It is demonstrated that FVCOM provides overall a second-order spatial accuracy for the vertically averaged equations (i.e., external mode), and with increasing grid resolution the model-computed solutions show a fast convergence toward the analytic solutions regardless of the particular triangulation method. Examples are provided to illustrate the ability of FVCOM to facilitate local grid refinement and speed up computation. Comparisons are also made between FVCOM and the structured-grid Regional Ocean Modeling System (ROMS) for these test cases. For the linear problem in a simple rectangular domain, i.e., the wind-driven basin case, the performance of the two models is quite similar. For the nonlinear case, such as the Rossby equatorial soliton, the second-order advection scheme used in FVCOM is almost as accurate as the fourth-order advection scheme implemented in ROMS if the horizontal resolution is relatively high. FVCOM has taken advantage of the new development in computational fluid dynamics in resolving flow problems containing discontinuities. One salient feature illustrated by the three-dimensional barotropic wind-driven basin case is that FVCOM and ROMS simulations show different responses to the refinement of grid size in the horizontal and in the vertical.
Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 113 (2008): C07042, doi:10.1029/2007JC004557.
Showing items related by title, author, creator and subject.
Lai, Zhigang; Chen, Changsheng; Cowles, Geoffrey W.; Beardsley, Robert C. (American Geophysical Union, 2010-11-13)The unstructured grid finite volume coastal ocean model (FVCOM) system has been expanded to include nonhydrostatic dynamics. This addition uses the factional step method with both split mode explicit and semi-implicit ...
A dike–groyne algorithm in a terrain-following coordinate ocean model (FVCOM) : development, validation and application Ge, Jianzhong; Chen, Changsheng; Qi, Jianhua; Ding, Pingxing; Beardsley, Robert C. (2012-01)A dike-groyne module is developed and implemented into the unstructured-grid, three dimensional primitive equation Finite-Volume Coastal Ocean Model (FVCOM) for the study of the hydrodynamics around human-made construction ...
Complexity of the flooding/drying process in an estuarine tidal-creek salt-marsh system : an application of FVCOM Chen, Changsheng; Qi, Jianhua; Li, Chunyan; Beardsley, Robert C.; Lin, Huichan; Walker, Randy; Gates, Keith (American Geophysical Union, 2008-07-30)The tidal flooding/drying process in the Satilla River Estuary was examined using an unstructured-grid finite-volume coastal ocean model (FVCOM). Driven by tidal forcing at the open boundary and river discharge at the ...