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题名:
Generalized Viscoplastic Modeling of Debris Flow
作者: Cheng-lung Chen
刊名: Journal of Hydraulic Engineering
发表日期: 1988
卷: 114, 期:3, 页:237-258
收录类别: 其他
合作性质: 其它
摘要: 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.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iscas.ac.cn/handle/311060/1344
Appears in Collections:软件所图书馆_期刊论文

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Recommended Citation:
Cheng-lung Chen. Generalized Viscoplastic Modeling of Debris Flow[J]. Journal of Hydraulic Engineering,1988-01-01,114(3):237-258.
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