含间隙流体的颗粒流动数值模型

IF 3.4 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-04-22 DOI:10.1002/nag.3990

Yadong Wang, Wei Wu

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引用次数: 0

摘要

我们提出了一种针对类固态和类流态的颗粒流动力学行为的构成模型。应力速率张量被分解为与速率无关的部分和与速率有关的部分。与速率无关的部分采用低塑性模型，与速率有关的部分采用-型流变模型。在与速率相关的模型部分，引入了斯托克斯数来捕捉间隙流体粘度的影响。通过对颗粒材料和颗粒-流体混合物的元素试验进行数值模拟，证明了模型的性能。

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Numerical Model for Granular Flow With Interstitial Fluid

We present a constitutive model for the mechanical behavior of granular flow for both solid‐like and fluid‐like regimes. The stress rate tensor is decomposed into rate‐independent and rate‐dependent parts. The hypoplastic model is used for the rate‐independent part, while the ‐type rheological model is employed for the rate‐dependent part. The Stokes number is introduced to capture the influence of interstitial fluid viscosity within the rate‐dependent part of the model. The model performance is demonstrated through numerical simulations of element tests, encompassing both granular materials and granular‐fluid mixtures.

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来源期刊

International Journal for Numerical and Analytical Methods in Geomechanics 工程技术-材料科学：综合

CiteScore

6.40

自引率

12.50%

发文量

160

审稿时长

9 months

期刊介绍： The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.