CFD-DEM solution verification: Fixed-bed studies

Fullmer, William D.; Musser, Jordan

doi:10.1016/j.powtec.2018.08.044

CFD-DEM solution verification: Fixed-bed studies

Journal Article · Tue Aug 21 00:00:00 EDT 2018 · Powder Technology

DOI:https://doi.org/10.1016/j.powtec.2018.08.044· OSTI ID:1509722

Fullmer, William D. ^[1]; Musser, Jordan ^[2]

National Energy Technology Lab. (NETL), Morgantown, WV (United States); AECOM, Morgantown, WV (United States)
National Energy Technology Lab. (NETL), Morgantown, WV (United States)

Fixed (frozen) particle configurations are used to study CFD-DEM convergence behavior in the limit of infinite grid resolution. A filtering scheme based on solving a diffusion equation, i.e., a Gaussian kernel, is used to interpolate particle information to the continuum grid, free of cell size limitations. A regression method is used for Richardson extrapolation of the discrete solutions to the grid-free solution. The regression method is shown to predict accurate extrapolation curves in the presence of the observed oscillatory convergence behavior. The extrapolation curve is used to complete the solution verification process by quantifying the numerical uncertainty present in the calculations. Several numerical and model parameters are studied including the spatial discretization method, the kernel width and the mean drag law. Here, a manageable level of discretization error is found with relative discretization errors generally <4%.

View Accepted Manuscript (DOE)

Research Organization:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)

Sponsoring Organization:: FE; USDOE

Grant/Contract Number:: FE0004000

OSTI ID:: 1509722

Alternate ID(s):: OSTI ID: 1776167

Report Number(s):: CONTR-PUB-371

Journal Information:: Powder Technology, Journal Name: Powder Technology Journal Issue: C Vol. 339; ISSN 0032-5910

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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