%D 2018 %O This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. %T A comparison between interparticle forces estimated with direct powder shear testing and with sound assisted fluidization %A R Chirone %A F Raganati %A P Ammendola %A D Barletta %A P Lettieri %A M Poletto %X Understanding the role of the interparticle forces in fluidization of cohesive powders is crucial for a proper application of fluidization to these type of powders. However, a direct measure of the interparticle interactions (IPFs) is challenging, mainly because cohesive particles cannot be fluidized under ordinary conditions. That is the reason why IPFs are typically measured using a rheological approach. The aim of this study is, therefore, to evaluate the IPFs of cohesive powders under actual fluidization conditions, by using an experimental and theoretical approach. In particular, a sound assisted fluidized bed apparatus was used to achieve a fluidization regime of the particles. Then, the cluster/subcluster model was applied to calculate IPFs, starting from the experimental data. The obtained IPFs were then compared to those evaluated by using a shear testing approach. %J Powder Technology %K Sound assisted fluidization, Fine and ultrafine cohesive powders, Interparticle forces, Cluster/subcluster model %L discovery10022672 %V 323 %P 1-7