GENERALIZED VISCOPLASTIC MODELING OF DEBRIS FLOW.
Journal of Hydraulic Engineering
By: Cheng-lung Chen
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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.
| 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 |
| Larger Work Title | Journal of Hydraulic Engineering |
| First page | 237 |
| Last page | 258 |
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