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Particle image velocimetry analysis of a swirling bed operation by using a mesh-coupled annular air distributor

  • M. Y. Naz
  • S. Shukrullah
  • S. A. Sulaiman
  • Y. KhanEmail author
  • M. A. S. Alkanhal
  • A. Ghaffar
Technical Paper
  • 28 Downloads

Abstract

An air distributor is regarded as a key component of swirling fluidized bed designs. It considerably affects the quality of fluidization and efficiency of a swirling fluidized bed (SFB). In this study, a velocimetry technique was used to evaluate the performance of the SFB design operated with a mesh-coupled annular blade air distributor. The MATLAB-based particle image velocimetry (PIV) was carried out from top and side of the swirling bed. The velocity vector fields and average velocities of the fluidized particles at different points across the bed flow were determined by changing the particles size, particle density and superficial air velocity (SAV). PIV analysis revealed that the particles in a fluidized bed form a partially differentiable layer. The partially segregated bed layers included a thin layer of fast-moving particles near the distributor, a thick layer at the center and a slight bubbling top layer. It was noted that with an increase in SAV, the average particle velocity also increases. However, the particle velocity depreciates in moving upward along the bed column.

Keywords

Swirling fluidized bed Velocity vector field Mesh-coupled annular blade distributor Particle image velocimetry 

Notes

Acknowledgements

The authors would like to extend their sincere appreciation to the Deanship of Scientific Research at King Saud University for funding this work through Research Group No. RG1436-012.

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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  • M. Y. Naz
    • 1
  • S. Shukrullah
    • 1
  • S. A. Sulaiman
    • 2
  • Y. Khan
    • 3
    Email author
  • M. A. S. Alkanhal
    • 3
  • A. Ghaffar
    • 1
  1. 1.Department of PhysicsUniversity of AgricultureFaisalabadPakistan
  2. 2.Mechanical Engineering DepartmentUniversiti Teknologi PetronasSeri IskandarMalaysia
  3. 3.College of EngineeringKing Saud UniversityRiyadhSaudi Arabia

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