NONHYDROSTATIC MODELING OF FLOW INTERACTIONS WITH HIGHLY FLEXIBLE VEGETATION
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Tahvildari, N., Familkhalili, R., & Ma, G. (2020). NONHYDROSTATIC MODELING OF FLOW INTERACTIONS WITH HIGHLY FLEXIBLE VEGETATION . Coastal Engineering Proceedings, (36v), waves.59. https://doi.org/10.9753/icce.v36v.waves.59

Abstract

Improving our understanding of the interactions between gravity waves, currents, and coastal vegetation, which are nonlinear in nature, enables coastal engineers and managers to better estimate hydrodynamic forces on coastal infrastructure and utilize natural elements to mitigate their impacts. Aquatic vegetation is ubiquitous in coastal waters and it is well-known that flow loses energy over vegetation. Computational modeling of wave-vegetation interaction has been the subject of numerous recent studies and many improvements have been achieved in reducing limitations applied on wave and vegetation behavior in these models. Mechanisms for highly flexible vegetation have been incorporated in a Boussinesq-type model and Reynolds-Averaged Navier-Stokes (RANS) models. Flow dynamics over flexible vegetation and vegetation dynamics in response to hydrodynamic forcing are important for predicting wave and surge dissipation by vegetation, storm impacts on vegetation canopies, ecological processes, and sediment transport in estuaries, and require further investigation. In this study, we implement a numerical model for highly flexible vegetation in an open-source RANS model NHWAVE to address some of these questions.

Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/oAwb8nu4RSs
https://doi.org/10.9753/icce.v36v.waves.59
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References

Chen and Zou (2019): Eulerian–Lagrangian flow-vegetation interaction model using immersed boundary method and OpenFOAM, Advances in Water Resources, vol. 126, pp 176-192.

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Ma, Kirby, Su, Figlus, and Shi (2013): Numerical study of turbulence and wave damping induced by vegetation canopies, Coastal Engineering, vol. 80, pp 68-78.

Mattis, Kees, Wei, Dimakopoulos, and Dawson, (2019): Computational Model for Wave Attenuation by Flexible Vegetation, Journal of Waterway, Port, Coastal, and Ocean Engineering, vol. 145(1), pp. 04018033.

Tahvildari (2017): Numerical Modeling of the Interactions between Nonlinear Waves and Arbitrarily Flexible Vegetation, Proceedings of the 35th International Conference on Coastal Engineering, vol. 1(35): waves. 32.

Tahvildari and Zeller (submitted): A Coupled Computational Model for Wave Attenuation by Flexible Vegetation and Wave-Induced Stem Dynamics, Advances in Water Resources.

Zeller, Weitzman, Abbett, Zarama, Fringer and Koseff (2014): Improved parameterization of seagrass blade dynamics and wave attenuation based on numerical and laboratory experiments, Limnology and Oceanography, vol. 59(1), pp 251-266.

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