The effect of interparticle forces on fluidization regimes in the magnetized fluidized beds

This paper investigated the influence of interparticle forces on the qualit y of fluidization in a magnetically stabilized fluidized bed (MSFB), where we can "artificially" create interparticle forces (F-attr) of any magnitude by applying an external magnetic field to ferromagnetic particles. A theor etical model was proposed which predicts the transition point from a homoge neous to a heterogeneous fluidization as a function of the magnitude of the interparticle force and other physical characteristics of both particles a nd fluids that are usually observed in fluidization (rho(p), rho(f), mu, d( p), epsilon). The concept of the elastic wave velocity, U-c, and the contin uity wave velocity, U-epsilon was introduced. In particular, the interparti cle force manipulated by an externally applied magnetic field was taken int o account in addition to a general consideration of a conventional fluidize d bed. Bubbles form in a bed when the continuity wave velocity becomes fast er than the elastic wave velocity. The simulation demonstrated the proposed model could predict the transition point of fluidization regime with reaso nable accuracy.