CFD-DEM simulation of three-dimensional aeolian sand movement

Jiecheng Yang, Yu Zhang*, Dayou Liu, Xiaolin Wei

*Corresponding author for this work

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    A three-dimensional CFD-DEM model is proposed to investigate the aeolian sand movement. The results show that the mean particle horizontal velocity can be expressed by a power function of heights. The probability distribution of the impact and lift-off velocities of particles can be described by a log-normal function, and that of the impact and lift-off angles can be expressed by an exponential function. The probability distribution of particle horizontal velocity at different heights can be described as a lognormal function, while the probability distribution of longitudinal and vertical velocity can be described as a normal function. The comparison with previous two-dimensional calculations shows that the variations of mean particle horizontal velocity along the heights in two-dimensional and three-dimensional models are similar. However, the mean particle density of the two-dimensional model is larger than that in reality, which will result in the overestimation of sand transportation rate in the two-dimensional calculation. The study also shows that the predicted probability distributions of particle velocities are in good agreement with the experimental results.

    Original languageEnglish
    Pages (from-to)1306-1318
    Number of pages13
    JournalScience China: Physics, Mechanics and Astronomy
    Volume53
    Issue number7
    DOIs
    Publication statusPublished - Jul 2010

    Keywords

    • aeolian sand movement
    • CFD
    • DEM
    • three-dimensional simulation

    Fingerprint Dive into the research topics of 'CFD-DEM simulation of three-dimensional aeolian sand movement'. Together they form a unique fingerprint.

    Cite this