- Title
- Pressure drop prediction with a modified frictional-kinetic model for alumina in bypass pneumatic conveying system
- Creator
- Wang, Ying; Williams, Kenneth C.; Jones, Mark G.; Chen, Bin
- Relation
- ARC.DP0772127
- Relation
- International Journal of Multiphase Flow Vol. 79, Issue March 2016, p. 159-171
- Publisher Link
- http://dx.doi.org/10.1016/j.ijmultiphaseflow.2015.11.001
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2016
- Description
- A new frictional-kinetic model is proposed and modified for pressure drop prediction of alumina in a bypass pneumatic conveying system. This new model is based on the conventional Johnson-Jackson frictional-kinetic model. The critical value of solids volume fraction and maximum packing limit are modified based on the fluidized bulk density and tapped bulk density, respectively. In addition, an offset solid volume fraction is introduced into the frictional pressure model as well as into the radial distribution functions which represents the correction factors to modify the probability of collisions between particles when solid phase becomes excessively dense. For the application of the model, computational fluid dynamics (CFD) simulations were conducted by using kinetic theory, conventional frictional-kinetic model and modified frictional-kinetic model. The simulation results were then compared with the experimental results. It was found that the modified frictional-kinetic model showed the largest improvement on pressure drop prediction results compared with results obtained from applying the kinetic theory and the conventional frictional-kinetic model, especially for denser flows with low air mass flow rates and high solid loading ratios (SLR). In addition, the solids volume investigation of CFD simulations shows a strong comparison to the actual flow conditions in the pipe, as transient slug type flow of alumina is observed.
- Subject
- modified frictional-kinetic model; pressure drop; bypass pneumatic conveying; simulation; alumina
- Identifier
- http://hdl.handle.net/1959.13/1320350
- Identifier
- uon:24133
- Identifier
- ISSN:0301-9322
- Language
- eng
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