Correlation on the particle entrainment rate in gas fluidized beds

An empirical correlation, considering the temperature effect but no effects of interparticle forces, on the particle entrainment rate at the gas exit of the fluidized bed has been proposed on the basis of the comprehensive ex perimental data. The entrainment flux is considered to consist of a constan t flux independent of freeboard height and another flux decreasing exponent ially with freeboard height. The correlation successfully follows the measu red trend where the entrainment rate increased after an initial decrease wi th increasing temperature and the minimum entrainment rate at a given tempe rature. The correlation also successfully describes the pressure effect sho wing that the entrainment rate increases with pressure.