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Article Dans Une Revue EPJ Web of Conferences Année : 2021

Transients in pressure-imposed shearing of dense granular suspensions

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Granular materials whether dry or immersed in fluid show dilation or compaction depending upon the initial conditions, solid fraction and normal stress. Here we probe the transient response of a dense granular suspension subjected to change of applied normal stress under simple shear. In this aim, normal-stress-imposed discrete element particle simulations are developed considering the contributions arising from the drag induced on the particles by fluid phase. These pressure-imposed simulations show transient behaviors of dense granular suspensions such as dilation or compaction before reaching a steady state following the µ( J ) rheology. Less expectedly, the transient behavior, in particular the height of the system as a function of applied strain, can also be described by assuming that the system follows the steady µ( J ) rheology at all times.
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hal-03366953 , version 1 (03-11-2021)

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Shivakumar Athani, Yoel Forterre, Bloen Metzger, Romain Mari. Transients in pressure-imposed shearing of dense granular suspensions. EPJ Web of Conferences, 2021, 249, pp.09009. ⟨10.1051/epjconf/202124909009⟩. ⟨hal-03366953⟩
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