Granular Stack Density’s Influence on Homogeneous Fluidization Regime: Numerical Study Based on EDEM-CFD Coupling
| Autor: | Li Wang, Aboubacar Sidiki Drame, Yanping Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science QH301-705.5 QC1-999 ANSYS-FLUENT Granular material Physics::Fluid Dynamics Stack (abstract data type) Fluent homogeneous fluidization General Materials Science Fluidization Biology (General) Porosity QD1-999 Instrumentation Fluid Flow and Transfer Processes EDEM Turbulence Physics Process Chemistry and Technology General Engineering Mechanics Engineering (General). Civil engineering (General) Computer Science Applications Condensed Matter::Soft Condensed Matter Chemistry liquid–solid coupling simulation Fluidized bed Volume fraction TA1-2040 |
| Zdroj: | Applied Sciences Volume 11 Issue 18 Applied Sciences, Vol 11, Iss 8696, p 8696 (2021) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app11188696 |
| Popis: | FLUENT and EDEM were applied to simulate liquid–solid coupling in a 3D homogenous fluidization. The dynamics of destabilization of the granular material immersed by homogeneous fluidization were observed. The effect of initial packing density of granular stack and fluidization rate on the fluidization’s transient regime, the configuration of particles in the fluidized bed and the variation of bed height were analyzed and discussed. According to the results, there was an original observation of a strong impact of the initial density of an initially static granular stack on the transient fluidization regime. Depending on the material initial volume fraction, there was a difference in grain dynamics. For an initially loose stack, a homogeneous turbulent fluidization was observed, whereas for an initially dense stack, there was a mass takeoff of the stack. The propagation of wave porosity instability, from the bottom to the top of the stack with fast kinetics that decompacted the medium, followed this mass takeoff. |
| Databáze: | OpenAIRE |
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