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Tilting process with humidity: DEM modeling and comparison with experiments

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Abstract

Granular matter is present everywhere in our practical lives and mostly used in natural environment (i.e. classical atmospheric conditions). This fact implies that the humidity rate which controls the water content can be involved in their behaviors. Especially adhesion forces between grains are linked to this humidity rate. Here we study a well known experiment defined as a laboratory test for avalanches. We continuously tilt a box filled with grains up to the appearance of precursors and full avalanches. These avalanches are directly proportional to the forces acting at the contact level between grains. We use a numerical approach based on the classical discrete element methods ‘spring-Dashpot’ with soft model. Firstly, we check the ability of our code to handle tilting experiments, then, an extra adhesion term linked to the humidity rate is added. Full comparison between ‘dry’ case and humid case is done.

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Acknowledgments

L. Oger would like to thanks the Universidad Nacional de San Luis for the one month invitation as invited professor. A.M. Vidales, R.O. Uñac. and I. Ippolito want to thank CONICET support through the grant PIP No. 1022. We thanks Jean Pierre Hulin for fruitful discussions. This work is partially supported by the LIA Physique et Mécanique des Fluides.

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Authors and Affiliations

  1. Institut de Physique de Rennes, Université de Rennes1, 263, Avenue du General Leclerc, Campus de Beaulieu, CS 74205, 35042, Rennes Cedex, France

    Luc Oger

  2. Laboratorio de Medios Granulares, INFAP-CONICET, Universidad Nacional de San Luis, Ejército de los Andes 950, D5700HHW, San Luis, Argentina

    Ana M. Vidales & Rodolfo O. Uñac

  3. Grupo de Medios Porosos, Facultad de Ingeniería, Universidad de Buenos Aires, Av. Paseo Colón 850, C1063ACV, Buenos Aires, Argentina

    Irene Ippolito

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  1. Luc Oger
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  2. Ana M. Vidales
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  3. Rodolfo O. Uñac
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  4. Irene Ippolito
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Correspondence to Luc Oger.

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Oger, L., Vidales, A.M., Uñac, R.O. et al. Tilting process with humidity: DEM modeling and comparison with experiments. Granular Matter 15, 629–643 (2013). https://doi.org/10.1007/s10035-013-0433-9

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