Should we care about the spatial heterogeneity in coral reefs under unidirectional turbulent flows?
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909635108143104 |
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| author | Patil, Akshay García-Sánchez, Clara |
| author_facet | Patil, Akshay García-Sánchez, Clara |
| contents | In this work, we systematically investigate the similarities and differences observed between a hydraulically rough wall comprised of an array of cylinders, massive corals, and branching corals arranged in a staggered manner, along with a stochastically generated coral bed using a scale-resolving computational framework. Our data suggests that for all the flow parameters of interest, there is a substantial difference observed between the stochastic coral bed and the regularly arranged coral bed. By analysing the double-averaged statistics and time-averaged spatial heterogeneity in the hydrodynamic response, we explain the differences observed between the four cases that bring out significant local effects. These observations have important consequences for modelling coral-like roughness in numerical and experimental settings to better understand the mean flow statistics and the spatial heterogeneity induced as a consequence of the underlying coral geometry. Our results can help inform the coastal ocean modelling efforts to further improve the inclusion of coral heterogeneity within two-equation closure models by further investigating the impact of spatially stochastic, rough bottom boundary layers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03021 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Should we care about the spatial heterogeneity in coral reefs under unidirectional turbulent flows? Patil, Akshay García-Sánchez, Clara Fluid Dynamics Geophysics In this work, we systematically investigate the similarities and differences observed between a hydraulically rough wall comprised of an array of cylinders, massive corals, and branching corals arranged in a staggered manner, along with a stochastically generated coral bed using a scale-resolving computational framework. Our data suggests that for all the flow parameters of interest, there is a substantial difference observed between the stochastic coral bed and the regularly arranged coral bed. By analysing the double-averaged statistics and time-averaged spatial heterogeneity in the hydrodynamic response, we explain the differences observed between the four cases that bring out significant local effects. These observations have important consequences for modelling coral-like roughness in numerical and experimental settings to better understand the mean flow statistics and the spatial heterogeneity induced as a consequence of the underlying coral geometry. Our results can help inform the coastal ocean modelling efforts to further improve the inclusion of coral heterogeneity within two-equation closure models by further investigating the impact of spatially stochastic, rough bottom boundary layers. |
| title | Should we care about the spatial heterogeneity in coral reefs under unidirectional turbulent flows? |
| topic | Fluid Dynamics Geophysics |
| url | https://arxiv.org/abs/2506.03021 |