The effects of particle size distribution (PSD) on the thixotropic behaviour of coal-water slurries has been investigated. Slurries with bimodal particle size distributions gave PSD characterised by weight-average particle diameter, blend ratio, and weight percent of fine fraction blended. Rheology models are discussed. Results of an experimental procedure to follow the effects of characteristic parameters involved with the original PSD of bimodal coal-water slurry fuels on the possible thixotropic behaviour are presented. 5 refs., 4 figs.
