Item  Ratio of Prototype to Model λ, ratio of radius   Homogeneous  Heterogeneous Particle Diameter ----- λ 1 Heat-Transfer surface λ2 λ2 λ2 Volumetric Flow rate λ3 λ2 λ3 Heat Transfer per unit of surface 1 λ2 λ2 Heat Transfer per unit of throughput λ-1 1 λ-1

Table 4: Heat-Transfer Relations in Chemical Similitude.