Shallow flow simulation on dynamically adaptive cut cell quadtree grids
A computationally efficient, high-resolution numerical model of shallow flow hydrodynamics is described, based on dynamically adaptive quadtree grids. The numerical model solves the two-dimensional non-linear shallow water equations by means of an explicit second-order MUSCL-Hancock Godunov-type fin...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2007
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| _version_ | 1826276214161014784 |
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| author | Liang, Q Zang, J Borthwick, A Taylor, P |
| author_facet | Liang, Q Zang, J Borthwick, A Taylor, P |
| author_sort | Liang, Q |
| collection | OXFORD |
| description | A computationally efficient, high-resolution numerical model of shallow flow hydrodynamics is described, based on dynamically adaptive quadtree grids. The numerical model solves the two-dimensional non-linear shallow water equations by means of an explicit second-order MUSCL-Hancock Godunov-type finite volume scheme. Interface fluxes are evaluated using an HLLC approximate Riemann solver. Cartesian cut cells are used to improve the fit to curved boundaries. A ghost-cell immersed boundary method is used to update flow information in the smallest cut cells and overcome the time step restriction that would otherwise apply. The numerical model is validated through simulations of reflection of a surge wave at a wall, a low Froude number potential flow past a circular cylinder, and the shock-like interaction between a bore and a circular cylinder. The computational efficiency is shown to be greatly improved compared with solutions on a uniform structured grid implemented with cut cells. Copyright © 2006 John Wiley and Sons, Ltd. |
| first_indexed | 2024-03-06T23:10:40Z |
| format | Journal article |
| id | oxford-uuid:6556bdb5-8c46-4f4e-98be-381f4d2e72b2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:10:40Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:6556bdb5-8c46-4f4e-98be-381f4d2e72b22022-03-26T18:24:57ZShallow flow simulation on dynamically adaptive cut cell quadtree gridsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6556bdb5-8c46-4f4e-98be-381f4d2e72b2EnglishSymplectic Elements at Oxford2007Liang, QZang, JBorthwick, ATaylor, PA computationally efficient, high-resolution numerical model of shallow flow hydrodynamics is described, based on dynamically adaptive quadtree grids. The numerical model solves the two-dimensional non-linear shallow water equations by means of an explicit second-order MUSCL-Hancock Godunov-type finite volume scheme. Interface fluxes are evaluated using an HLLC approximate Riemann solver. Cartesian cut cells are used to improve the fit to curved boundaries. A ghost-cell immersed boundary method is used to update flow information in the smallest cut cells and overcome the time step restriction that would otherwise apply. The numerical model is validated through simulations of reflection of a surge wave at a wall, a low Froude number potential flow past a circular cylinder, and the shock-like interaction between a bore and a circular cylinder. The computational efficiency is shown to be greatly improved compared with solutions on a uniform structured grid implemented with cut cells. Copyright © 2006 John Wiley and Sons, Ltd. |
| spellingShingle | Liang, Q Zang, J Borthwick, A Taylor, P Shallow flow simulation on dynamically adaptive cut cell quadtree grids |
| title | Shallow flow simulation on dynamically adaptive cut cell quadtree grids |
| title_full | Shallow flow simulation on dynamically adaptive cut cell quadtree grids |
| title_fullStr | Shallow flow simulation on dynamically adaptive cut cell quadtree grids |
| title_full_unstemmed | Shallow flow simulation on dynamically adaptive cut cell quadtree grids |
| title_short | Shallow flow simulation on dynamically adaptive cut cell quadtree grids |
| title_sort | shallow flow simulation on dynamically adaptive cut cell quadtree grids |
| work_keys_str_mv | AT liangq shallowflowsimulationondynamicallyadaptivecutcellquadtreegrids AT zangj shallowflowsimulationondynamicallyadaptivecutcellquadtreegrids AT borthwicka shallowflowsimulationondynamicallyadaptivecutcellquadtreegrids AT taylorp shallowflowsimulationondynamicallyadaptivecutcellquadtreegrids |