Rheological characteristics of solid-fluid transition in dry granular dense flows: A thermodynamically consistent constitutive model with a pressure-ratio order parameter

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

Dry granular flows are characterized as quasi-static, dense and collisional states by the interactions among the grains, which is indexed macroscopically by an internal variable, called the order parameter defined as the square root of the static pressure to the total pressure. The solid-fluid state transition is regarded as a second-order phase transition process, and is described by a kinematic evolution of the order parameter. The thermodynamic analysis, based on the Müller-Liu entropy principle, is employed to deduce the equilibrium responses of the constitutive equations, while the dynamic responses are postulated on the basis of a quasi-linear and the second-order Ginzburg-Landau phase transition theories. The obtained model is applied to study the rheological characteristics of a dry granular dense flow between two infinite parallel plates, of which the results are compared with those from DEM simulations to estimate the model validity. The present study provides a general framework for the theoretical justifications on the thermodynamic consistencies of order-parameter-based constitutive models, and can be extended to flows in quasi-static or collisional states.

原文English
頁(從 - 到)881-905
頁數25
期刊International Journal for Numerical and Analytical Methods in Geomechanics
34
發行號9
DOIs
出版狀態Published - 2010 六月 1

All Science Journal Classification (ASJC) codes

  • 計算力學
  • 材料科學(全部)
  • 岩土工程與工程地質
  • 材料力學

指紋

深入研究「Rheological characteristics of solid-fluid transition in dry granular dense flows: A thermodynamically consistent constitutive model with a pressure-ratio order parameter」主題。共同形成了獨特的指紋。

引用此