Improvement of semi-resolved CFD-DEM model for seepage-induced fine-particle migration: Eliminate limitation on mesh refinement. (June 2019)

• Record Type: Journal Article
• Authors: Yang, Qing; Cheng, Kuang; Wang, Yin; Ahmad, Mahmood
• Is Part Of: Computers and geotechnics. Volume 110(2019)
• Page Start: 1
• Page End: 18
• Publication Date: 2019-06
• Subjects: Discrete element method -- Computational fluid dynamics -- Gaussian-based weighting function -- Fine particle migration -- Piping erosion -- Filter; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2019.02.002
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: The semi-resolved CFD-DEM model, proposed in our previous paper (Cheng et al., 2018) for the modelling of seepage-induced fine-particle migration through coarse skeleton in gap-graded soils, is improved through using Gaussian-based weighting function for fine particle-fluid coupling based on locally averaging theory. By doing so, it eliminates the limitation on fine particle-fluid mesh size ratio and thereby facilitates capturing detailed flow pattern through the coarse skeleton by refining fluid meshes. The improved semi-resolved CFD-DEM model is validated by Particle Image Velocimetry results of velocity field of fine glass beads migration through a simple coarse skeleton.