Verification of sub-grid filtered drag models for gas-particle fluidized beds with immersed cylinder arrays

Avik Sarkar; Xin Sun; Sankaran Sundaresan

doi:10.1016/j.ces.2014.04.018

Verification of sub-grid filtered drag models for gas-particle fluidized beds with immersed cylinder arrays

Avik Sarkar, Xin Sun, Sankaran Sundaresan

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

The accuracy of coarse-grid multiphase CFD simulations of fluidized beds may be improved via the inclusion of filtered constitutive models. In our previous study ( Sarkar et al., 2013 Chem. Eng. Sci., 104, pp. 399-412), we developed such a set of filtered drag relationships for beds with immersed arrays of cooling tubes. Verification of these filtered drag models is addressed in this work. Predictions from coarse-grid simulations with the sub-grid filtered corrections are compared against accurate, highly-resolved simulations of full-scale turbulent and bubbling fluidized beds. The filtered drag models offer a computationally efficient yet accurate alternative for obtaining macroscopic predictions, but the spatial resolution of meso-scale clustering heterogeneities is sacrificed.

Original language	English (US)
Pages (from-to)	144-154
Number of pages	11
Journal	Chemical Engineering Science
Volume	114
DOIs	https://doi.org/10.1016/j.ces.2014.04.018
State	Published - Jul 26 2014

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Industrial and Manufacturing Engineering

Keywords

Computational fluid dynamics (CFD)
Cylinder arrays
Filtered models
Fluidization
Multiphase flow
Scale-up

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10.1016/j.ces.2014.04.018

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title = "Verification of sub-grid filtered drag models for gas-particle fluidized beds with immersed cylinder arrays",

abstract = "The accuracy of coarse-grid multiphase CFD simulations of fluidized beds may be improved via the inclusion of filtered constitutive models. In our previous study ( Sarkar et al., 2013 Chem. Eng. Sci., 104, pp. 399-412), we developed such a set of filtered drag relationships for beds with immersed arrays of cooling tubes. Verification of these filtered drag models is addressed in this work. Predictions from coarse-grid simulations with the sub-grid filtered corrections are compared against accurate, highly-resolved simulations of full-scale turbulent and bubbling fluidized beds. The filtered drag models offer a computationally efficient yet accurate alternative for obtaining macroscopic predictions, but the spatial resolution of meso-scale clustering heterogeneities is sacrificed.",

keywords = "Computational fluid dynamics (CFD), Cylinder arrays, Filtered models, Fluidization, Multiphase flow, Scale-up",

author = "Avik Sarkar and Xin Sun and Sankaran Sundaresan",

note = "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 Jean-Fran{\c c}ois Dietiker and Janine Carney (National Energy Technology Laboratory) and to Sebastien Dartevelle (Los Alamos National Laboratory) for their assistance with this work.",

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doi = "10.1016/j.ces.2014.04.018",

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AU - Sarkar, Avik

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 Jean-François Dietiker and Janine Carney (National Energy Technology Laboratory) and to Sebastien Dartevelle (Los Alamos National Laboratory) for their assistance with this work.

PY - 2014/7/26

Y1 - 2014/7/26

N2 - The accuracy of coarse-grid multiphase CFD simulations of fluidized beds may be improved via the inclusion of filtered constitutive models. In our previous study ( Sarkar et al., 2013 Chem. Eng. Sci., 104, pp. 399-412), we developed such a set of filtered drag relationships for beds with immersed arrays of cooling tubes. Verification of these filtered drag models is addressed in this work. Predictions from coarse-grid simulations with the sub-grid filtered corrections are compared against accurate, highly-resolved simulations of full-scale turbulent and bubbling fluidized beds. The filtered drag models offer a computationally efficient yet accurate alternative for obtaining macroscopic predictions, but the spatial resolution of meso-scale clustering heterogeneities is sacrificed.

AB - The accuracy of coarse-grid multiphase CFD simulations of fluidized beds may be improved via the inclusion of filtered constitutive models. In our previous study ( Sarkar et al., 2013 Chem. Eng. Sci., 104, pp. 399-412), we developed such a set of filtered drag relationships for beds with immersed arrays of cooling tubes. Verification of these filtered drag models is addressed in this work. Predictions from coarse-grid simulations with the sub-grid filtered corrections are compared against accurate, highly-resolved simulations of full-scale turbulent and bubbling fluidized beds. The filtered drag models offer a computationally efficient yet accurate alternative for obtaining macroscopic predictions, but the spatial resolution of meso-scale clustering heterogeneities is sacrificed.

KW - Computational fluid dynamics (CFD)

KW - Cylinder arrays

KW - Filtered models

KW - Fluidization

KW - Multiphase flow

KW - Scale-up

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JO - Chemical Engineering Science

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Verification of sub-grid filtered drag models for gas-particle fluidized beds with immersed cylinder arrays

Abstract

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Keywords

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