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Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405] >
A new approach for implementing the HLL approximate riemann solver for one-dimensional dam-break flows
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http://hdl.handle.net/1860/1358
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| Title: | A new approach for implementing the HLL approximate riemann solver for one-dimensional dam-break flows |
| Authors: | Ying, Xinya
Wang, Sam S.Y. |
| Keywords: | Modeling of confined flows
Computational hydraulics |
| Issue Date: | 13-Sep-2006 |
| Publisher: | Michael Piasecki and College of Engineering, Drexel University |
| Citation: | Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732 |
| Abstract: | Several new techniques are proposed to overcome the deficiencies in the conventional formulation
of the approximate Riemann solvers for one-dimensional dam-break flows, which include numerical
imbalance and failure to satisfy mass conservation. The former arises in the case of irregular
geometry and the latter in the presence of a hydraulic jump. These new techniques include: (1)
adopting the form of the Saint Venant equations which include only one source term representing
driving forces; (2) using water surface level as one of the primitive variables, in stead of crosssectional
area; (3) defining discharge at interface and evaluating it according to the flux obtained by
the HLL Riemann solver (Harten et al 1983). The performance of the resulting schemes is evaluated
by means of theoretical analysis and various test examples, including ideal dam-break flows with
dry bed, hydraulic jump, steady flow over bump with hydraulic jump, and a real-life dam-break flow
in natural river valley with complex geometry. It is demonstrated that the scheme has excellent
numerical balance and mass conservation property and is capable of satisfactorily reproducing
various complicated open channel flows. |
| Description: | Paper presented at The Seventh International Conference on HydroScience and Engineering (ICHE)hosted by the College of Engineering at Drexel Univeristy on September 10-13, 2006 in Philadelphia, Pennsylvania. The conference theme was IT in the Field of HydroSciences. It included several mini-symposia that emphasized IT topics in HydroSciences and the yearly meeting of the metadata group of the International Oceanographic Data and Information Exchange organization. |
| URI: | http://hdl.handle.net/1860/1358 |
| ISBN: | 0977447405 |
| Appears in Collections: | Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405]
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