Case Description

• ·  High efficiency Stairmand type cyclone.

Operating Condition

• ·  Without particle : Uniform flow was specified with the air velocity equal to 16.1 m/s at inlet
• ·  With particle : Uniform flow was specified with the air velocity equal to 10, 20, 30 m/s at inlet

Computational Mesh

• ·  About 590,000 structured hexahedral cell

Physical Models

• Turbulence Model :

·  RANS : RSTM LG(Launder Gibson) model

·  LES : Smagorinsky model

• Turbulence particle dispersion model

·  DRW (Discrete random walk)

·  CRW (Continuous random walk)

Results

• Radial distributions of tangential and axial velocity profiles by RSTM and LES

• Grade collection efficiencies by CRW in RSTM and LES and their curves fitted to the logistic function

• Time-averaged pressure contours by (a) RSTM and (b) LES​

• Effect of the dispersion models, DRW and CRW, on the overall collection efficiency ​