An Investigation of the Restitution Coefficient Impact on Simulating Sand-Char Mixing in a Bubbling Fluidized Bed
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ID: 266563
2017
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Abstract
In the present work, the effect of the restitution coefficient on the numerical results for a binary mixture system of sand particles and char particles in a bubbling fluidized bed with a huge difference between the particles in terms of density and volume fraction has been studied based on two-fluid model along with the kinetic theory of granular flow. Results show that the effect of restitution coefficient on the flow characteristics varies in different regions of the bed, which is more evident for the top region of the bed. The restitution coefficient can be categorized into two classes. The restitution coefficients of 0.7 and 0.8 can be included into one class, whereas the restitution coefficient of 0.9 and 0.95 can be included into another class. Moreover, four vortices can be found in the time-averaged flow pattern distribution, which is very different from the result obtained for the binary system with the similar values between particles in density and volume fraction.
| Reference Key |
zhao2017energiesan
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|---|---|
| Authors | Xinjun Zhao;Qitai Eri;Qiang Wang;Zhao, Xinjun;Eri, Qitai;Wang, Qiang; |
| Journal | energies |
| Year | 2017 |
| DOI |
10.3390/en10050617
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| URL | |
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