About the Instability of Viscoplastic Medium with Internal Friction

Igor A. Garagash

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

The slow movement of rock can be modeled by non-Newtonian viscous flow which developing quasi exponentially after reaching of the yield strength. This flow closer to the ideal plasticity rather than to the Newtonian viscosity and in the limit can be considered as viscoplastic current. Was studied the bifurcation of the uniform flow of viscoplastic medium with internal dry friction. The condition when the disturbed flow equations lose ellipticity was found. It is shown that the adjacent flow forms can be realized in the form of linear or cell structures. It is shown that increase of pore pressure reduces the instability interval of flow velocity.

Original languageEnglish
Title of host publicationPoromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics
EditorsPatrick Dangla, Jean-Michel Pereira, Siavash Ghabezloo, Matthieu Vandamme
PublisherAmerican Society of Civil Engineers (ASCE)
Pages1813-1818
Number of pages6
ISBN (Electronic)9780784480779
DOIs
Publication statusPublished - 2017
Externally publishedYes
Event6th Biot Conference on Poromechanics, Poromechanics 2017 - Paris, France
Duration: 9 Jul 201713 Jul 2017

Publication series

NamePoromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics

Conference

Conference6th Biot Conference on Poromechanics, Poromechanics 2017
Country/TerritoryFrance
CityParis
Period9/07/1713/07/17

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