In the present work, the simulation of the air-lift pump is carried out through a full hydrodynamic
model solved numerically using iterative procedures. The low accuracy of the mean air-volume
fraction model mentioned above can be improved by describing the flow along the upriser with a
standard set of differential equations, suitable for two-phase flows. Empirical correlations are
used only for calculating the friction terms, while the possibility of many flow regimes is also
allowed, the type of which is determined by a flow regime map. The differential equations are
integrated and solved by using the finite-volume method. Flow in the suction pipe is calculated by
simply applying the Bernoulli equation and inserting an additional term for friction in the entry
region of the suction pipe