INFLUENCE OF PARTICLE-SHAPE ON THE DRAG COEFFICIENT FOR ISOMETRIC PARTICLES

A comprehensive correlation has been developed of the drag coefficient for nonspherical isometric particles as a function the Reynolds numbe r and the particle sphericity on the basis of data reported in the lit erature. The proposed formula covers the Stokes, the transitional and the Newton region. The predictions of the reported correlation have be en compared to experimental data measured in this work with the dolomi tic materials in respect to their use in calcination and gas cleaning processes with fluidized beds. Approximative explicit formulae have al so been reported that make it possible to estimate the terminal free-f all velocity of a given particle or to predict the particle diameter c orresponding to a fluid velocity of interest.