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GENERALIZED VISCOPLASTIC MODELING OF DEBRIS FLOW.

Journal of Hydraulic Engineering

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Abstract

The earliest model developed by R. A. Bagnold was based on the concept of the 'dispersive' pressure generated by grain collisions. 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.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
GENERALIZED VISCOPLASTIC MODELING OF DEBRIS FLOW.
Series title:
Journal of Hydraulic Engineering
Volume
114
Issue:
3
Year Published:
1988
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
237
Last page:
258
Number of Pages:
22