Impact of High‐Resolution Modeling on Secondary Flow Phenomena

Katopodes, Nikolaos D.; Kao, Kuo‐Cheng; Bradford, Scott F.

doi:doi:10.1061/40628(268)14

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Proceedings / Volume 268 / Issue 40628 / MODELING SPECIFIC HYDRODYNAMIC FEATURES

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Impact of High‐Resolution Modeling on Secondary Flow Phenomena

ASCE Conf. Proc. doi:http://dx.doi.org/10.1061/40628(268)14

Estuarine and Coastal Modeling 2001

Proceedings of the Seventh International Conference on Estuarine and Coastal Modeling

Nikolaos D. Katopodes¹, Kuo‐Cheng Kao², and Scott F. Bradford³

¹Professor, Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48109
²Doctoral Student, Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48109
³Mechanical Engineer, Image Science and Applications Branch, Code 7261, Naval Research Laboratory, Washington D.C. 20375

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Abstract

A high‐resolution hydrodynamic model is used to demonstrate that small variations of coefficients in nonlinear filters used to preserve the monotonicity of the solution can lead to significant changes in the computed results. The model is applied to a complex geometry and bathymetry environment, which further aggravate the computational differences. Thermal plumes from hypothetical tests in Green Bay are shown to assume entirely different configurations following long runs of the model. The dissipative nature of various filters is found to alter dramatically not only the spurious oscillations, but the underlying smooth solution of the problem.