Influence of Some Parameters on the Umf

Many authors worked relating to fluid dynamics of solid particles. Tannous et al. (1994) highlight some important observations on the minimum fluidization velocity:

  • The bed height (0.10 to 0.30 m) and column diameter (0.1 to 0.40 m) did not significantly influence on the minimum fluidizing conditions, for 10<Remf<270 and 0,14x105<Ar<180x105;
  • Umf may increase 20% when the bed bidimensional height, increases from 0.05 to 0.30 m;
  • Umf Umf decreases with increase in operating pressure. However, this decrease is negligible for beds of thin particles (dp < 100mm), but becomes significant (up to 40%) for large particles (dp > 360mm).