A numerical program developed for field application is presented in this paper. We use the generalized Julien and Lan (1991) rheological model to simulate debris flows. Due to the derivative discontinuous nature of the constitutive law, flow is separated into plug region and bottom region (with stress greater than yield stress). The program solves the plug flow layer solution first and then corrects the solution with the bottom layer approximation. Numerical scheme with upwind method and central difference in space and Adam-Bashforth 3rd order scheme in time is used for both layers. The scheme is tested against analytical solutions and laboratory experiments with very good results. Application to a field case with more complicated geometry, also achieves good agreement with error less than 5% compared with field measurements. Final example demonstrates how this numerical program is used in a preliminary design.
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ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering
May 31–June 5, 2009
Honolulu, Hawaii, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4346-8
PROCEEDINGS PAPER
Numerical Simulation of Debris Flows
Ko-Fei Liu,
Ko-Fei Liu
National Taiwan University, Taipei, Taiwan
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Ming-Chun Huang
Ming-Chun Huang
Ching-Yun University, Taipei, Taiwan
Search for other works by this author on:
Ko-Fei Liu
National Taiwan University, Taipei, Taiwan
Ming-Chun Huang
Ching-Yun University, Taipei, Taiwan
Paper No:
OMAE2009-79197, pp. 375-382; 8 pages
Published Online:
February 16, 2010
Citation
Liu, K, & Huang, M. "Numerical Simulation of Debris Flows." Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. Volume 6: Materials Technology; C.C. Mei Symposium on Wave Mechanics and Hydrodynamics; Offshore Measurement and Data Interpretation. Honolulu, Hawaii, USA. May 31–June 5, 2009. pp. 375-382. ASME. https://doi.org/10.1115/OMAE2009-79197
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