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Lookup NU author(s): Dr Agostino Bruno,
Dr Sadegh Nadimi
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
This paper presents a Computational Fluid Dynamics (CFD) model on the effect of capillary pressure on the retention behaviour of a granular material. The model proposes an unprecedented CFD insight into the onset of liquid menisci at the inter-particles contact under varying hydraulic conditions. The present work models the material grains as smooth spherical particles that define a porous network filled by two interstitial fluids: air and silicon oil. The numerical model has been subsequently validated against experimental measurements of the degree of saturation at different capillary pressures taken by Dullien et al. [F.A. Dullien, C. Zarcone, I.F. MacDonald, A. Collins, R.D. Bochard. J. Colloid Interface Sci. 127, 2 (1989)] in a system of smooth glass beads flooded with silicon oil. Results from the numerical simulations confirm the good capability of the model to reproduce the experimental retention behaviour of the granular material. Finally, the present paper laid the basis for future CFD studies on the effect of various factors (e.g. hydraulic hysteresis, surface roughness and/or grain shape) on the capillary pressure acting at the interparticle contact.
Author(s): Lopez A, Bruno AW, Nadimi S
Publication type: Article
Publication status: Published
Journal: EPJ Web of Conferences
Print publication date: 07/06/2021
Online publication date: 07/06/2021
Acceptance date: 07/06/2021
Date deposited: 07/06/2021
ISSN (electronic): 2100-014X
Publisher: EDP Sciences
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