Generalized Viscoplastic Modeling of Debris Flow

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	Generalized Viscoplastic Modeling of Debris Flow
	Cheng-lung Chen
	1988
发表期刊	Journal of Hydraulic Engineering
卷号	114 期号:3 页码:237-258
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.
收录类别	其他
合作性质	其它
语种	英语
内容类型	期刊论文
URI标识	http://ir.iscas.ac.cn/handle/311060/1344
专题	中国科学院软件研究所
推荐引用方式 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.

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