- Title
- Development of design models for the transport of fine powders on air-gravity conveyors
- Creator
- Ding, Hongliang; Chen, Bin; Williams, Kenneth; Jones, Mark
- Relation
- CHoPS 2015: 8th International Conference for Conveying and Handling of Particulate Solids. Proceedings of the Eighth International Conference for Conveying and Handling of Particulate Solids (CHoPS 2015) (Tel Aviv, Israel 03-07 May, 2015)
- Publisher
- CHoPS
- Resource Type
- conference paper
- Date
- 2015
- Description
- Air-gravity conveyors, commonly referred to as air-slides, are widely used in industry to convey bulk materials with the advantages of low particle velocities, low levels of particle attrition, potentially very high conveying rates and low power consumption. Most current designs are based on empirical design charts and past experience as there have been relatively few investigations attempting to model the flow of aerated powders on air-gravity conveyor systems. In this paper, ANSYS FLUENT has been used to simulate the air-gravity flow, where a steady, three-dimensional fluidized granular flow is considered in a rectangular channel having frictional side walls for different flow conditions. The results of simulated bed heights along the air-gravity channel are discussed. Moreover, this paper reports on work which attempts to develop a fundamental conveying model for air-gravity conveyor flows in inclined channels with an emphasis on the conservation of momentum taking into account the rheology of the gas-solid mixture. The conveying model shows the relationship between mass flow rate and bed height. The developed model well predicts the steady flow bed heights for each mass flow rate. A sensitivity analysis has been carried out which demonstrates that the conveying model can be applied to powders in a fluidized state to predict the bed heights of the flow under inclination angles between 1° to 10°.
- Subject
- bulk materials; air-gravity conveyors; particle attrition; conveying model
- Identifier
- http://hdl.handle.net/1959.13/1320349
- Identifier
- uon:24134
- Language
- eng
- Hits: 920
- Visitors: 1104
- Downloads: 0