Numerical Modeling of Flow Over Trapezoidal Broad-Crested Weir
| Autor: | Robert Feurich, Nils Reidar Bøe Olsen, Stefan Haun |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Engineering Applications of Computational Fluid Mechanics |
| ISSN: | 1997-003X 1994-2060 |
| Popis: | Two computational fluid dynamics (CFD) codes, Flow-3D and SSIIM 2, have been used to calculate the water flow over a trapezoidal broad-crested weir. The two programs apply different algorithms for making the grid and computing the free water surface. Flow-3D uses the Volume of Fluid (VOF) method with a fixed grid, while SSIIM 2 uses an algorithm based on the continuity equation and the Marker-and-Cell method, together with an adaptive grid for the water surface. The results have been compared with measurements from a physical model study, using different discharges. The deviation between the computed and measured upstream water level was between 1.0 and 3.5%. The difference between the results from the two CFD models was in the range of 1–1.5%. The accuracy of the algorithms depends on the grid size. The computational time on one core of a CPU (Intel Q9650 3.00 GHz) was between 435 and 15,500 seconds, using between 6,350 and 10,000 cells. Copyright 2011 Taylor and Francis Group LLC. This is an open access article published by Taylor & Francis in [Engineering Applications of Computational Fluid Mechanics] on [19 Nov 2014] |
| Databáze: | OpenAIRE |
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