Abstract
A Reynolds-averaged Navier-stokes equations (RANS) model using the body force method (BFM) has been developed to simulate open-channel flows over gravel beds. The momentum equation is modified by introducing the form drag as an extra body force term to represent the gravel-bed resistance. By applying the body force within the roughness layer of the flow over small-scale roughness, it is found that the body force coefficient frk varies inversely with the roughness length scale ks. The method is robust, not sensitive to mesh resolution and is easily extended to deal with large scale roughness.
Original language | English |
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Title of host publication | Recent Progresses in Fluid Dynamics Research - Proceedings of the Sixth International Conference on Fluid Mechanics, ICFM VI |
Pages | 417-420 |
Number of pages | 4 |
Volume | 1376 |
DOIs | |
Publication status | Published - 8 Nov 2011 |
Event | Proceedings of the 6th International Conference on Fluid Mechanics: Recent Progresses in Fluid Dynamics Research, ICFM VI - Guangzhou, China Duration: 30 Jun 2011 → 3 Jul 2011 |
Conference
Conference | Proceedings of the 6th International Conference on Fluid Mechanics: Recent Progresses in Fluid Dynamics Research, ICFM VI |
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Country/Territory | China |
City | Guangzhou |
Period | 30/06/11 → 3/07/11 |
Keywords
- body force method
- gravel beds
- open-channel flows
- RANS modeling
- turbulent flows
ASJC Scopus subject areas
- General Physics and Astronomy