Longitudinal surface profiles of granular debris flows

Chyan-Deng Jan, Hsieh Wen Shen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Longitudinal surface profiles of granular material flowing down an inclined plane were studied by means of theoretical analysis and laboratory experiments. There are two driving forces acting on the granular material. One is a gravity force component along the inclined plane and the second is a force induced by lateral pressure gradient. The lateral earth pressure theory used in soil mechanics was expanded for granular debris flow. The total resistant stress acting on granular flows was treated as the linear sum of a rate-independent, contact friction part and a rate-dependent, viscous part. The former was expressed as a Mohr-Coulomb relationship. The latter was expressed as a friction slope relating to flow velocity and flow depth. According to this forgoing assumptions and the balance of longitudinal momentum, a method to calculate the longitudinal surface profiles was developed, by using a moving coordinate. Experiments with 5 mm glass beads were conducted in a conveyor-belt flume. Preliminary results suggest that the slope of the surface profile of granular flow decreases as the flume slope increases, and the slope of the surface profile increases as the belt speed increases. Experimental results were also compared with theoretical results.

Original languageEnglish
Title of host publicationHydraulics/Hydrology of Arid Lands
EditorsRichard H. French
PublisherPubl by ASCE
Pages530-536
Number of pages7
ISBN (Print)0872627713
Publication statusPublished - 1990
EventProceedings of the International Symposium on Hydraulics/Hydrology of Arid Lands and 1990 National Conference on Hydraulic Engineering - San Diego, CA, USA
Duration: 1990 Jul 301990 Aug 2

Other

OtherProceedings of the International Symposium on Hydraulics/Hydrology of Arid Lands and 1990 National Conference on Hydraulic Engineering
CitySan Diego, CA, USA
Period90-07-3090-08-02

Fingerprint

Debris
Granular materials
Friction
Soil mechanics
Pressure gradient
Flow velocity
Momentum
Gravitation
Earth (planet)
Experiments
Glass

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Jan, C-D., & Shen, H. W. (1990). Longitudinal surface profiles of granular debris flows. In R. H. French (Ed.), Hydraulics/Hydrology of Arid Lands (pp. 530-536). Publ by ASCE.
Jan, Chyan-Deng ; Shen, Hsieh Wen. / Longitudinal surface profiles of granular debris flows. Hydraulics/Hydrology of Arid Lands. editor / Richard H. French. Publ by ASCE, 1990. pp. 530-536
@inproceedings{41b46f0342b246a4abe7f582ad31ee68,
title = "Longitudinal surface profiles of granular debris flows",
abstract = "Longitudinal surface profiles of granular material flowing down an inclined plane were studied by means of theoretical analysis and laboratory experiments. There are two driving forces acting on the granular material. One is a gravity force component along the inclined plane and the second is a force induced by lateral pressure gradient. The lateral earth pressure theory used in soil mechanics was expanded for granular debris flow. The total resistant stress acting on granular flows was treated as the linear sum of a rate-independent, contact friction part and a rate-dependent, viscous part. The former was expressed as a Mohr-Coulomb relationship. The latter was expressed as a friction slope relating to flow velocity and flow depth. According to this forgoing assumptions and the balance of longitudinal momentum, a method to calculate the longitudinal surface profiles was developed, by using a moving coordinate. Experiments with 5 mm glass beads were conducted in a conveyor-belt flume. Preliminary results suggest that the slope of the surface profile of granular flow decreases as the flume slope increases, and the slope of the surface profile increases as the belt speed increases. Experimental results were also compared with theoretical results.",
author = "Chyan-Deng Jan and Shen, {Hsieh Wen}",
year = "1990",
language = "English",
isbn = "0872627713",
pages = "530--536",
editor = "French, {Richard H.}",
booktitle = "Hydraulics/Hydrology of Arid Lands",
publisher = "Publ by ASCE",

}

Jan, C-D & Shen, HW 1990, Longitudinal surface profiles of granular debris flows. in RH French (ed.), Hydraulics/Hydrology of Arid Lands. Publ by ASCE, pp. 530-536, Proceedings of the International Symposium on Hydraulics/Hydrology of Arid Lands and 1990 National Conference on Hydraulic Engineering, San Diego, CA, USA, 90-07-30.

Longitudinal surface profiles of granular debris flows. / Jan, Chyan-Deng; Shen, Hsieh Wen.

Hydraulics/Hydrology of Arid Lands. ed. / Richard H. French. Publ by ASCE, 1990. p. 530-536.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Longitudinal surface profiles of granular debris flows

AU - Jan, Chyan-Deng

AU - Shen, Hsieh Wen

PY - 1990

Y1 - 1990

N2 - Longitudinal surface profiles of granular material flowing down an inclined plane were studied by means of theoretical analysis and laboratory experiments. There are two driving forces acting on the granular material. One is a gravity force component along the inclined plane and the second is a force induced by lateral pressure gradient. The lateral earth pressure theory used in soil mechanics was expanded for granular debris flow. The total resistant stress acting on granular flows was treated as the linear sum of a rate-independent, contact friction part and a rate-dependent, viscous part. The former was expressed as a Mohr-Coulomb relationship. The latter was expressed as a friction slope relating to flow velocity and flow depth. According to this forgoing assumptions and the balance of longitudinal momentum, a method to calculate the longitudinal surface profiles was developed, by using a moving coordinate. Experiments with 5 mm glass beads were conducted in a conveyor-belt flume. Preliminary results suggest that the slope of the surface profile of granular flow decreases as the flume slope increases, and the slope of the surface profile increases as the belt speed increases. Experimental results were also compared with theoretical results.

AB - Longitudinal surface profiles of granular material flowing down an inclined plane were studied by means of theoretical analysis and laboratory experiments. There are two driving forces acting on the granular material. One is a gravity force component along the inclined plane and the second is a force induced by lateral pressure gradient. The lateral earth pressure theory used in soil mechanics was expanded for granular debris flow. The total resistant stress acting on granular flows was treated as the linear sum of a rate-independent, contact friction part and a rate-dependent, viscous part. The former was expressed as a Mohr-Coulomb relationship. The latter was expressed as a friction slope relating to flow velocity and flow depth. According to this forgoing assumptions and the balance of longitudinal momentum, a method to calculate the longitudinal surface profiles was developed, by using a moving coordinate. Experiments with 5 mm glass beads were conducted in a conveyor-belt flume. Preliminary results suggest that the slope of the surface profile of granular flow decreases as the flume slope increases, and the slope of the surface profile increases as the belt speed increases. Experimental results were also compared with theoretical results.

UR - http://www.scopus.com/inward/record.url?scp=0025628201&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025628201&partnerID=8YFLogxK

M3 - Conference contribution

SN - 0872627713

SP - 530

EP - 536

BT - Hydraulics/Hydrology of Arid Lands

A2 - French, Richard H.

PB - Publ by ASCE

ER -

Jan C-D, Shen HW. Longitudinal surface profiles of granular debris flows. In French RH, editor, Hydraulics/Hydrology of Arid Lands. Publ by ASCE. 1990. p. 530-536