Abstract
Abstract
A rheological approach of muddy debris flows is presented for environmental engineering and risk assessment purposes. The debris flow is viewed as a hyperconcentrated suspension of non brownian solid particles. Experimental and theoretical studies are presented versus the concentration. The experimental work generally consists in generating the flow of well characterized suspensions by a dam break. Then, the time evolution of the front as well as that of the stage at given position are accurately determined. On the theoretical framework, the viscous equations of motion of the suspension are written with the shallow water approximation, and the asymptotic solution in a non dimensional form is derived. Finally, the experimental and the theoretical results are successfully compared and the limits of this rheological approach is fixed.
Subject
Condensed Matter Physics,General Materials Science
Reference19 articles.
1. A rheologic classification of subareal sediment - water flows;Pierson;Soc Am Rev Eng Geol,1987
2. Recognition classifica - tion and mechanical description of debris flows;Coussot;Earth Sci Rev,1996
3. Thien Xi Jun Fan and Boo Cheong Khoo A new constitutive model for monodis - persed suspensions of spheres at high concen - trations;Nhan Phan;Acta,1999
4. Dam break flood in a pris - matic dry channel;Sakkas;Hydr Div,1973
5. Rhéologie des boues et laves torren - tielles Etude de dispersions et suspensions con - centrées Ph Grenoble;Coussot;Thesis,1992
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献