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Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405] >
Large-eddy simulation of turbulent open-channel flow with free-surface fluctuations
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http://hdl.handle.net/1860/1387
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| Title: | Large-eddy simulation of turbulent open-channel flow with free-surface fluctuations |
| Authors: | Nakayama, Akihiko
Matsumura, Tomohiro
Hisasue, Nobuyuki |
| Keywords: | Large eddy simulation
Turbulence modeling
Computational hydraulics |
| Issue Date: | 11-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: | Large-eddy simulations of open-channel flows with free-surface fluctuations have been conducted.
The conventional HSMAC algorithm of Hirt & Cook(1972) is extended to incorporate the calculation of
the motion of the free surface within the iteration cycle for computing the pressure and the velocity
using the kinematic and the dynamic conditions to be satisfied on the free surface. This method of
computing a moving free surface has been verified in a benchmark of two-dimensional standing wave
flow. For the sub-grid scale model, the standard Smagorinsky model with near-wall damping is used. Its
performance is verified in a fully developed open-channel flow over a smooth flat bed at a laboratory
Reynolds number. Subcritical flow past a sudden drop is then simulated and the results indicate that the
mean velocity distribution can be predicted very well but the turbulent stresses need improvement. |
| 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/1860/1387 |
| ISBN: | 0977447405 |
| Appears in Collections: | Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405]
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