Effects of coral colony morphology on turbulent flow dynamics

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dc.contributor.authorHossain, Md Moniren
dc.contributor.authorStaples, Anne E.en
dc.contributor.departmentBiomedical Engineering and Mechanicsen
dc.date.accessioned2021-02-02T20:33:20Zen
dc.date.available2021-02-02T20:33:20Zen
dc.date.issued2020-10-07en
dc.description.abstractLocal flow dynamics play a central role in physiological processes like respiration and nutrient uptake in coral reefs. Despite the importance of corals as hosts to a quarter of all marine life, and the pervasive threats facing corals, characterizing the hydrodynamics between the branches of scleractinian corals has remained a significant challenge. Here, we investigate the effects of colony branch density and surface structure on the local flow field using three-dimensional immersed boundary, large-eddy simulations for four different colony geometries under unidirectional oncoming flow conditions. The first two colonies were from thePocilloporagenus, one with a densely branched geometry, and one with a comparatively loosely branched geometry. The second pair of geometries were derived from a scan of a singleMontipora capitatacolony, one with the roughness elements called verrucae covering the surface intact, and one with the verrucae removed. For thePocilloporacorals, we found that the mean velocity profiles changed substantially in the center of the dense colony, becoming significantly reduced at middle heights where flow penetration was poor, while the mean velocity profiles in the loosely branched colony remained similar in character from the front to the back of the colony. For theMontiporacorals, somewhat counterintuitively, the colony without verrucae produced almost double the maximum Reynolds stress magnitude above the colony compared to the colony without verrucae. This implies that the smooth colony will have enhanced mass transport and higher bed shear stress and friction velocity values relative to the colony with verrucae.en
dc.description.notesThis work was supported by the United States Department of State's Bureau of Educational and Cultural Affairs through the Fulbright Program and by the Engineering Mechanics program at Virginia Tech. Publication of this work was supported by the Virginia Tech Open Access Subvention Fund. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. There was no additional external funding received for this study.en
dc.description.sponsorshipUnited States Department of State's Bureau of Educational and Cultural Affairs through the Fulbright Program; Engineering Mechanics program at Virginia Tech; Virginia Tech Open Access Subvention Funden
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0225676en
dc.identifier.issn1932-6203en
dc.identifier.issue10en
dc.identifier.othere0225676en
dc.identifier.pmid33027270en
dc.identifier.urihttp://hdl.handle.net/10919/102200en
dc.identifier.volume15en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleEffects of coral colony morphology on turbulent flow dynamicsen
dc.title.serialPLoS Oneen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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