We implemented for the first time our radioactive particle tracking as an advanced noninvasive technique to further evaluate and validate our newly developed mechanistic scale-up methodology based on matching the radial profile of the gas holdup. Two spouted beds with diameters of 0.076 and 0.152 m were used. Three sets of conditions were implemented; i.e., conditions of the reference case, conditions that provided a gas-holdup radial profile similar to that of the reference case, and conditions that provided a gas-holdup radial profile dissimilar to that of the reference case. The results confirm the validation of the scale-up methodology in terms of obtaining closer dimensionless values and radial profiles of components of the particle velocity, normal stress, shear stress, and turbulent kinetic energy. The results further advance the understanding of gas–solids spouted beds, provide deeper insight into the solids dynamics of the beds and present important benchmarking data for validating computational fluid dynamics codes and models.

我们首次将放射性粒子跟踪作为一种先进的无创技术来实施，以基于匹配气体滞留量的径向轮廓，进一步评估和验证我们新开发的机械放大方法。使用两个直径为0.076和0.152 m的喷射床。实施了三套条件；即，参考情况的条件，提供与参考情况相似的气体保持径向轮廓的条件，以及提供与参考情况相异的气体保持径向轮廓的条件。结果获得了更接近的无量纲值和粒子速度，法向应力，剪应力和湍动能分量的径向分布图，从而证实了放大方法的有效性。