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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.13 [2006] >
IJEMS Vol.13(4) [August 2006] >
| Title: | A comparative study of the effect of model lift coefficients on particle trajectory |
| Authors: | Gupta, Pankaj K
Pagalthivarthi, Krishnan V |
| Issue Date: | Aug-2006 |
| Publisher: | CSIR |
| IPC Code: | F15D |
| Abstract: | The objective of
the present work is to (i) study the influence of different model lift
coefficients, (ii) evaluate the importance of particle rotation, and (iii)
compare the present computed results with two-way coupling results (in open
literature) on the particle trajectory in dilute two-phase gas-solid horizontal
channel flow. A hybrid Eulerian-Lagrangian method is employed where the
Reynolds averaged Navier-Stokes (RANS) equations with k-
closure are used to model the fluid phase, and the particulate phase is treated
via Lagrangian approach. Particle-wall collision is modeled using
impulse-momentum equations. Five different models of lift coefficients (and/or
lift forces) are selected from the open literature to evaluate the influence of
lift force on the particle. The effect of shear lift is relatively very small
as compared to lift due to particle rotation. Particle rotational velocities of
the order of magnitude as high as 104-105 rad/s are
encountered due to particle-wall collision. Results of computed particle
trajectories with simplified assumptions agree closely with (i) the simulated
results of FLUENT® (Version 6.1) with one-way and two-way coupling,
and (ii) of other authors using two-way coupling. In terms of particle lift
(and trajectory), the simulated results of FLUENT® with one-way
coupling are in agreement with the literature than two-way coupling. |
| Page(s): | 293-306 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.13(4) [August 2006]
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