Evaluation of Wall Boundary Condition Parameters for Gas-Solids Fluidized Bed Simulations [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 2013.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- 3,624-3,632 : digital, PDF file
- Additional Creators
- National Energy Technology Laboratory (U.S.), United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- Wall boundary conditions for the solids phase have significant effects on numerical predictions of various gas-solids fluidized beds. Several models for the granular flow wall boundary condition are available in the open literature for numerical modeling of gas-solids flow. In this study, a model for specularity coefficient used in Johnson and Jackson boundary conditions by Li and Benyahia (AIChE Journal, 2012, 58, 2058-2068) is implemented in the open-source CFD code-MFIX. The variable specularity coefficient model provides a physical way to calculate the specularity coefficient needed by the partial-slip boundary conditions for the solids phase. Through a series of 2-D numerical simulations of bubbling fluidized bed and circulating fluidized bed riser, the model predicts qualitatively consistent trends to the previous studies. Furthermore, a quantitative comparison is conducted between numerical results of variable and constant specularity coefficients to investigate the effect of spatial and temporal variations in specularity coefficient.
- Report Numbers
- E 1.99:contr-pub-023
contr-pub-023 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
10/01/2013.
"contr-pub-023"
AICHE JOURNAL 59 10 FT
Benyahia, Sofiane; Li, Tingwen. - Funding Information
- DE-FE0004000
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