Numerical investigation of the penetrating gas flow into particle clusters for circulating fluidized beds
| Autor: | Ronald W. Breault, Justin Weber, Xiaoyang Wei |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science Aggregate (composite) Gas velocity General Chemical Engineering Flow (psychology) 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology 020401 chemical engineering Particle diameter Cluster (physics) Particle 0204 chemical engineering 0210 nano-technology Astrophysics::Galaxy Astrophysics Randomness |
| Zdroj: | Powder Technology. 388:442-449 |
| ISSN: | 0032-5910 |
| DOI: | 10.1016/j.powtec.2021.04.046 |
| Popis: | Gas-solid circulating fluidized beds (CFBs) are widely used as reactors in industry with performances heavily relying on the interaction between gas and particles. In a CFB, some particles stay dispersed, while other particles aggregate to form dense and large clusters. As the gas-particle interaction is simple for dispersed particles, the prediction of reactor performances calls for a thorough analysis of the gas-cluster interaction. In the literature, cluster properties have been characterized extensively. However, how the gas interacts with clusters has not been quantified systematically yet. In this work, the gas-cluster interaction was quantified numerically by characterizing the penetrating gas flow into clusters. With 99 simulations, influences of the particle randomness, cluster solids holdup, cluster diameter, particle diameter, superficial gas velocity and fluid properties on the gas-cluster interaction were investigated systematically. Then, an empirical correlation was proposed to quantify the gas-cluster interaction, significantly contributing to the design and optimization of CFBs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect