Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 강석구 | - |
dc.date.accessioned | 2018-02-01T04:58:01Z | - |
dc.date.available | 2018-02-01T04:58:01Z | - |
dc.date.issued | 2011-07 | - |
dc.identifier.citation | Advances in Water Resources, 2011, 34(7), P.829-843 | en_US |
dc.identifier.issn | 0309-1708 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0309170811000492?via%3Dihub | - |
dc.description.abstract | The fluid?structure interaction curvilinear immersed boundary (FSI-CURVIB) numerical method of Borazjani et al. [3] is extended to simulate coupled flow and sediment transport phenomena in turbulent open-channel flows. The mobile channel bed is discretized with an unstructured triangular mesh and is treated as a sharp-interface immersed boundary embedded in a background curvilinear mesh used to discretize the general channel outline. The unsteady Reynolds-averaged Navier?Stokes (URANS) equations closed with the k?ω turbulence model are solved numerically on a hybrid staggered/non-staggered grid using a second-order accurate fractional step method. The bed deformation is calculated by solving the sediment continuity equation in the bed-load layer using an unstructured, finite-volume formulation that is consistent with the CURVIB framework. Both the first-order upwind and the higher-order hybrid GAMMA schemes [12] are implemented to discretize the bed-load flux gradients and their relative accuracy is evaluated through a systematic grid refinement study. The GAMMA scheme is employed in conjunction with a sand-slide algorithm for limiting the bed slope at locations where the material angle of repose condition is violated. The flow and bed deformation equations are coupled using the partitioned loose-coupling FSI-CURVIB approach [3]. The hydrodynamic module of the method is validated by applying it to simulate the flow in an 180° open-channel bend with fixed bed. To demonstrate the ability of the model to simulate bed morphodynamics and evaluate its accuracy, we apply it to calculate turbulent flow through two mobile-bed open channels, with 90° and 135° bends, respectively, for which experimental measurements are available. | en_US |
dc.description.sponsorship | This work was supported by NSF grants EAR-0120914 (as part of the National Center for Earth-Surface Dynamics) and EAR-0738726. Computational resources were provided by the University of Minnesota Supercomputing Institute. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Elsevier Science LTD | en_US |
dc.subject | Immersed boundary method | en_US |
dc.subject | Numerical models | en_US |
dc.subject | Sediment transport models | en_US |
dc.subject | Channel bends; Turbulence | en_US |
dc.subject | Steady state | en_US |
dc.title | Curvilinear immersed boundary method for simulating coupled flow and bed morphodynamic interactions due to sediment transport phenomena | en_US |
dc.type | Article | en_US |
dc.relation.no | 7 | - |
dc.relation.volume | 34 | - |
dc.identifier.doi | 10.1016/j.advwatres.2011.02.017 | - |
dc.relation.page | 829-843 | - |
dc.relation.journal | ADVANCES IN WATER RESOURCES | - |
dc.contributor.googleauthor | Khosronejad, Ali | - |
dc.contributor.googleauthor | Kang, Seokkoo | - |
dc.contributor.googleauthor | Borazjani, Iman | - |
dc.contributor.googleauthor | Sotiropoulos, Fotis | - |
dc.relation.code | 2011200315 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING | - |
dc.identifier.pid | kangsk78 | - |
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