Conditions Dimensionless Groups of table 1.3 That can be ignored
  Homogenous Heterogeneous
Batch or low flow rate a, c, d, e h, j, k, l
Small diffusional resistance b i
Constant volume c, g j, n
Small radiation Heat transfer  g n
Adiabatic with small heat of reaction  f, g  m, n
Table 2: Special cases resulting in Limited Similitude.