Abstract
Drag force coefficient is crucial for modelling gas-solid flows in using Discrete Element Method (DEM). Previous studies seldom concern about the mathematical properties of this coefficient, and just take it as a homogenous function. In this paper, a mathematical demonstration is carried out to prove that the drag force coefficient is a 2nd order tensor, and indicate it can be reduced to a homogenous function. Then, seven kinds of drag force coefficients adopted by MFIX are listed. Finally, all the listed coefficients are assessed by simulating the granular flows in a slot-rectangular spouted bed. Comparing the simulated velocities of particles with the experimental data in the spouted region, different drag force coefficients are analysed to find which one is the best to model the granular flows in this spouted bed.
Keywords
- Discrete Element Method
- Granular Flow
- Slot Width
- Discrete Element Method Model
- Virtual Mass Force
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Zhang, H., Li, S. (2017). Study on Drag Force Coefficients in Modeling Granular Flows in a Slot-Rectangular Spouted Bed. In: Li, X., Feng, Y., Mustoe, G. (eds) Proceedings of the 7th International Conference on Discrete Element Methods. DEM 2016. Springer Proceedings in Physics, vol 188. Springer, Singapore. https://doi.org/10.1007/978-981-10-1926-5_72
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DOI: https://doi.org/10.1007/978-981-10-1926-5_72
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