Influence of grid resolution, parcel size and drag models on bubbling fluidized bed simulation

Lu, Liqiang; Konan, Arthur; Benyahia, Sofiane

doi:10.1016/j.cej.2017.06.002

Influence of grid resolution, parcel size and drag models on bubbling fluidized bed simulation

Journal Article · Fri Jun 02 04:00:00 EDT 2017 · Chemical Engineering Journal

DOI:https://doi.org/10.1016/j.cej.2017.06.002· OSTI ID:1404697

^[1]; Konan, Arthur ^[2]; Benyahia, Sofiane ^[1]

National Energy Technology Lab. (NETL), Morgantown, WV (United States)
National Energy Technology Lab. (NETL), Morgantown, WV (United States); West Virginia Univ., Morgantown, WV (United States). Research Corporation

Here in this paper, a bubbling fluidized bed is simulated with different numerical parameters, such as grid resolution and parcel size. We examined also the effect of using two homogeneous drag correlations and a heterogeneous drag based on the energy minimization method. A fast and reliable bubble detection algorithm was developed based on the connected component labeling. The radial and axial solids volume fraction profiles are compared with experiment data and previous simulation results. These results show a significant influence of drag models on bubble size and voidage distributions and a much less dependence on numerical parameters. With a heterogeneous drag model that accounts for sub-scale structures, the void fraction in the bubbling fluidized bed can be well captured with coarse grid and large computation parcels. Refining the CFD grid and reducing the parcel size can improve the simulation results but with a large increase in computation cost.

View Accepted Manuscript (DOE)

Research Organization:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research

Sponsoring Organization:: USDOE

OSTI ID:: 1404697

Alternate ID(s):: OSTI ID: 1550291

Report Number(s):: NETL-PUB--21045; PII: S1385894717309531

Journal Information:: Chemical Engineering Journal, Journal Name: Chemical Engineering Journal Journal Issue: C Vol. 326; ISSN 1385-8947

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Method to estimate uncertainty associated with parcel size in coarse discrete particle simulation Lu, Liqiang; Benyahia, Sofiane AIChE Journal, Vol. 64, Issue 7 https://doi.org/10.1002/aic.16100	journal	February 2018
Three-Dimensional Full-Loop Hydrodynamic Simulation of a Circulating Fluidized-Bed Gasifier: A Quantitative Assessment of Drag Models Sharma, Vikrant; Agarwal, Vijay Kumar Arabian Journal for Science and Engineering, Vol. 44, Issue 12 https://doi.org/10.1007/s13369-019-04040-0	journal	July 2019

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97 MATHEMATICS AND COMPUTING
99 GENERAL AND MISCELLANEOUS
Computational fluid dynamics
bubbling fluidized bed
coarse-grained particle method
discrete element method

Influence of grid resolution, parcel size and drag models on bubbling fluidized bed simulation

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References (41)

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