TY - JOUR
T1 - Filtered sub-grid constitutive models for fluidized gas-particle flows constructed from 3-D simulations
AU - Sarkar, Avik
AU - Milioli, Fernando E.
AU - Ozarkar, Shailesh
AU - Li, Tingwen
AU - Sun, Xin
AU - Sundaresan, Sankaran
N1 - Funding Information:
This work, performed at the Pacific Northwest National Laboratory, was funded by the U.S. Department of Energy , Office of Fossil Energy's Carbon Capture Simulation Initiative (CCSI) through the National Energy Technology Laboratory. Pacific Northwest National Laboratory is operated by Battelle Memorial Institute for the U.S. Department of Energy under Contract no. DE-AC05-76RL01830 . We also express our gratitude to Christian C. Milioli (currently at Princeton University), Jean-François Dietiker (NETL), and Janine Carney (NETL) for their assistance with this work.
Publisher Copyright:
© 2016 Elsevier Ltd.
PY - 2016/10/2
Y1 - 2016/10/2
N2 - The accuracy of fluidized-bed CFD predictions using the two-fluid model can be improved significantly, even when using coarse grids, by replacing the microscopic kinetic-theory-based closures with coarse-grained constitutive models. These coarse-grained constitutive relationships, called filtered models, account for the unresolved gas-particle structures (clusters and bubbles) via sub-grid corrections. Following the previous 2-D approaches of Igci et al. [AIChE J., 54(6), 1431-1448, 2008] and Milioli et al. [AIChE J., 59(9), 3265-3275, 2013], new closures for the filtered inter-phase drag and stresses in the gas and particle phases are constructed from highly-resolved 3-D simulations of gas-particle flows. These new closure relations are then validated through the bubbling-fluidized-bed challenge problem presented by National Energy Technology Laboratory and Particulate Solids Research Inc.
AB - The accuracy of fluidized-bed CFD predictions using the two-fluid model can be improved significantly, even when using coarse grids, by replacing the microscopic kinetic-theory-based closures with coarse-grained constitutive models. These coarse-grained constitutive relationships, called filtered models, account for the unresolved gas-particle structures (clusters and bubbles) via sub-grid corrections. Following the previous 2-D approaches of Igci et al. [AIChE J., 54(6), 1431-1448, 2008] and Milioli et al. [AIChE J., 59(9), 3265-3275, 2013], new closures for the filtered inter-phase drag and stresses in the gas and particle phases are constructed from highly-resolved 3-D simulations of gas-particle flows. These new closure relations are then validated through the bubbling-fluidized-bed challenge problem presented by National Energy Technology Laboratory and Particulate Solids Research Inc.
KW - Computational fluid dynamics (CFD)
KW - Constitutive models
KW - Fluidization
KW - Multiphase flow
KW - Scale-up
KW - Two-fluid model
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U2 - 10.1016/j.ces.2016.06.023
DO - 10.1016/j.ces.2016.06.023
M3 - Article
AN - SCOPUS:84976370542
SN - 0009-2509
VL - 152
SP - 443
EP - 456
JO - Chemical Engineering Science
JF - Chemical Engineering Science
ER -