Title

Comparison of Boundary Conditions for Predicting the Collection Efficiency of Cyclones

Abstract

Gas-particle flow in three cyclones was numerically modeled using the Eulerian-Lagrangian approach. A tangential lift-off boundary condition was developed and included in the CFD simulations of cyclone performance via a user-defined function. Particles were considered as detached from the surface if they met the criterion of tangential lift-off; otherwise they were captured by the surface. Prediction of the collection efficiency in cyclones was conducted using the three different boundary conditions: (1) bottom trap only; (2) cone and bottom trap; and (3) the tangential lift-off, which is a combination of trap and reflect. Comparison with experimental data in literature indicates that the tangential lift-off boundary condition yields more accurate predictions than other boundary conditions.

Department(s)

Mechanical and Aerospace Engineering

Keywords and Phrases

Boundary Condition; CFD Modeling; Collection Efficiency; Cyclone; Tangential Lift-Off

International Standard Serial Number (ISSN)

0032-5910; 1873-328X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Elsevier B.V, All rights reserved.

Publication Date

10 Apr 2007

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