The drag force in two-fluid models of gas-solid flows

Y.H. Zhang, J.M. Reese

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Currently, the two most widespread methods for modelling the particulate phase in numerical simulations of gas-solid flows are discrete particle simulation (see, e.g., Mikami, Kamiya, & Horio, 1998), and the two-fluid approach, e.g., kinetic theory models (see, e.g., Louge, Mastorakos, & Jenkins, 1991). In both approaches the gas phase is described by a locally averaged Navier-Stokes equation and the two phases are usually coupled by a drag force. Due to the large density difference between the particles and the gas, inter-phase forces other than the drag force are usually neglected, so it plays a significant role in characterising the gas-solid flow. Yasuna, Moyer, Elliott, and Sinclair (1995) have shown that the solution of their model is sensitive to the drag coefficient. In general, the performance of most current models depends critically on the accuracy of the drag force formulation.
LanguageEnglish
Pages1641-1644
Number of pages3
JournalChemical Engineering Science
Volume58
Issue number8
DOIs
Publication statusPublished - Apr 2003

Fingerprint

Two-fluid Model
Flow of solids
Drag Force
Drag
Gases
Fluids
Drag Coefficient
Kinetic theory
Drag coefficient
Kinetic Theory
Navier Stokes equations
Navier-Stokes Equations
Model
Fluid
Numerical Simulation
Gas
Formulation
Computer simulation
Modeling
Simulation

Keywords

  • numerical simulation
  • kinetic theory
  • particle
  • beds
  • pipe

Cite this

Zhang, Y.H. ; Reese, J.M. / The drag force in two-fluid models of gas-solid flows. In: Chemical Engineering Science. 2003 ; Vol. 58, No. 8. pp. 1641-1644.
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The drag force in two-fluid models of gas-solid flows. / Zhang, Y.H.; Reese, J.M.

In: Chemical Engineering Science, Vol. 58, No. 8, 04.2003, p. 1641-1644.

Research output: Contribution to journalArticle

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AU - Reese, J.M.

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AB - Currently, the two most widespread methods for modelling the particulate phase in numerical simulations of gas-solid flows are discrete particle simulation (see, e.g., Mikami, Kamiya, & Horio, 1998), and the two-fluid approach, e.g., kinetic theory models (see, e.g., Louge, Mastorakos, & Jenkins, 1991). In both approaches the gas phase is described by a locally averaged Navier-Stokes equation and the two phases are usually coupled by a drag force. Due to the large density difference between the particles and the gas, inter-phase forces other than the drag force are usually neglected, so it plays a significant role in characterising the gas-solid flow. Yasuna, Moyer, Elliott, and Sinclair (1995) have shown that the solution of their model is sensitive to the drag coefficient. In general, the performance of most current models depends critically on the accuracy of the drag force formulation.

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