Institutional Repository
| Generalized Viscoplastic Modeling of Debris Flow | |
| Cheng-lung Chen | |
| 1988 | |
| Source | Journal of Hydraulic Engineering
 |
| Volume | 114Issue:3Pages:237-258 |
| English Abstract | Various concepts have been proposed or used in the development of rheological models for debris flow. The earliest model developed by Bagnold was based on the concept of the “dispersive” pressure generated by grain collisions. Bagnold’s concept appears to be theoretically sound, but his empirical model has been found to be inconsistent with most theoretical models developed from non-Newtonian fluid mechanics. Although the generality of Bagnold’s model is still at issue, debris-flow modelers in Japan have generally accepted Takahashi’s formulas derived from Bagnold’s model. Some efforts have recently been made by theoreticians in non-Newtonian fluid mechanics to modify or improve Bagnold’s concept or model. A viable rheological model should consist both of a rate-independent part and a rate-dependent part. A generalized viscoplastic fluid (GVF) model that has both parts as well as two major rheological properties (i.e., the normal stress effect and soil yield criterion) is shown to be sufficiently accurate, yet practical, for general use in debris-flow modeling. In fact, Bagnold’s model is found to be only a particular case of the GVF model. Analytical solutions for (steady) uniform debris flows in wide channels are obtained from the GVF model based on Bagnold’s simplified assumption of constant grain concentration. |
| Indexed Type | 其他 |
| Cooperation Status | 其它 |
| Language | 英语 |
| Content Type | 期刊论文 |
| URI | http://ir.iscas.ac.cn/handle/311060/1344 |
| Collection | 中国科学院软件研究所 |
| Recommended Citation GB/T 7714 | Cheng-lung Chen. Generalized Viscoplastic Modeling of Debris Flow[J]. Journal of Hydraulic Engineering,1988,114(3):237-258. |
| APA | Cheng-lung Chen.(1988).Generalized Viscoplastic Modeling of Debris Flow.Journal of Hydraulic Engineering,114(3),237-258. |
| MLA | Cheng-lung Chen."Generalized Viscoplastic Modeling of Debris Flow".Journal of Hydraulic Engineering 114.3(1988):237-258. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| BJ01144755.pdf（1373KB） | 开放获取 | License | Application Full Text | |||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment