Year: 2025
Type: article
Abstract: causes the slope of the curve to decrease by 50-70%. Our numerical simulations reveal that the main factor leading to the strong change in the flow rate behavior at low hard grain concentration is the high sensitivity of the stress conditions in the orifice region to the mixture composition. Since frictional dissipation can be an important factor influencing the flow rate, we also analyze the frictional properties of our samples in two additional experiments: (i) quasistatic shear tests in a split-bottom shear cell and (ii) drag force measurements on an object moved in the mixture. The mixtures show increasing dissipation as a function of increasing hard grain concentration in both of these measurements, but the increase is rather modest in the low concentration range, thus it does not explain the abrupt change in the silo discharge rate.
Source: Soft Matter
DOI: 10.1039/d5sm00354g
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4409630202