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

Journal Article · Wed Apr 23 00:00:00 EDT 2014 · Chemical Engineering Science

DOI:https://doi.org/10.1016/j.ces.2014.04.018· OSTI ID:1158480

Sarkar, Avik ^[1]; Sun, Xin ^[1]; Sundaresan, Sankaran ^[2]

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1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
2. Princeton Univ., NJ (United States)

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., Chem. Eng. Sci., 104, 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.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1158480
• Report Number(s): PNNL-SA-101111; AA9010100
• Journal Information: Chemical Engineering Science, Vol. 114; ISSN 0009-2509
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

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