A semi-resolved CFD-DEM model for seepage-induced fine particle migration in gap-graded soils. (August 2018)

• Record Type: Journal Article
• Authors: Cheng, Kuang; Wang, Yin; Yang, Qing
• Is Part Of: Computers and geotechnics. Volume 100(2018)
• Page Start: 30
• Page End: 51
• Publication Date: 2018-08
• Subjects: Computational Fluid Dynamics (CFD) -- Discrete Element Method (DEM) -- Fictitious Domain (FD) method -- Fine particle migration -- Piping erosion; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2018.04.004
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: A semi-resolved CFD-DEM model is proposed to model the seepage-induced fine particle migration within the gap-graded soils consisting of fine and coarse particles. In this model, a resolved method, i.e., Fictitious Domain (FD) method is used to resolve the fluid flow around the coarse particles and the un-resolved approach based on the locally averaging theory is adopted to describe the interactions between the fine particles and the fluid flow for the computational efficiency. The semi-resolved CFD-DEM model is validated using several simple examples and is further used to analyze the fine particle migration and associated piping erosion in gap-graded soils.