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The erosion onset and kinetics of weakly cohesive granular materials based on experimental data from optically adapted jet erosion tests is investigated. The scouring kinetics are examined qualitatively for samples with an intergranular cohesion induced by either liquid or solid bonds. From a quantitative perspective, the erosion onset for the case of solid bond cohesion is here described by a generalized form of the usual Shields criterion including a cohesion number defined from yield tensile values considering both the micro- and macroscales.
Brunier-Coulin et al. (Mon,) studied this question.
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