Functional variation of minimum spouting velocity with static bed height in conical spouted beds

This is the authors' abstract. We don't add key points for this paper.

Static height (H0) is a key parameter in spouted bed as it is dictated by the amount of solids. Knowledge of minimum spouting velocity (ums) is a pre-requisite for optimal spouting condition for the loaded bed. Although a linear variation of ums with H0 has been reported, this is not strictly true. Runs were performed using particles having a wide range of densities (2500–16000 kg/m3) and sizes (570–2440 μm). ums was measured for a wide range of H0 values from those in the conical zone to those having a double height in the upper cylindrical one. Expressing ums ∝ H0α, with α being the exponent of the bed height, this exponent has a high dependency (∼0.5–2.0) on the particle features, and therefore on the bed regime. This will help to rightfully choose the value of α for a given set of particles processed in conical spouted beds with different H0.