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An efficient and reliable predictive method for fluidized bed simulation

Journal Article · · AIChE Journal
DOI:https://doi.org/10.1002/aic.15832· OSTI ID:1402453
 [1];  [1];  [2]
  1. National Energy Technology Lab. (NETL), Morgantown, WV (United States)
  2. National Energy Technology Lab. (NETL), Morgantown, WV (United States); AECOM, Morgantown WV (United States)

In past decades, the continuum approach was the only practical technique to simulate large-scale fluidized bed reactors because discrete approaches suffer from the cost of tracking huge numbers of particles and their collisions. This study significantly improved the computation speed of discrete particle methods in two steps: First, the time-driven hard-sphere (TDHS) algorithm with a larger time-step is proposed allowing a speedup of 20-60 times; second, the number of tracked particles is reduced by adopting the coarse-graining technique gaining an additional 2-3 orders of magnitude speedup of the simulations. A new velocity correction term was introduced and validated in TDHS to solve the over-packing issue in dense granular flow. The TDHS was then coupled with the coarse-graining technique to simulate a pilot-scale riser. The simulation results compared well with experiment data and proved that this new approach can be used for efficient and reliable simulations of large-scale fluidized bed systems.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, and Morgantown, WV (United States); Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
OSTI ID:
1402453
Alternate ID(s):
OSTI ID: 1401810
OSTI ID: 1440316
Report Number(s):
NETL-PUB--20967
Journal Information:
AIChE Journal, Journal Name: AIChE Journal Journal Issue: 12 Vol. 63; ISSN 0001-1541
Publisher:
American Institute of Chemical EngineersCopyright Statement
Country of Publication:
United States
Language:
English

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