A universal theory of spray atomization processes is proposed. Based on the
proposed theory, previously reported empirical models and analogy models s
uch as the TAB model and the OPT (oval-parabola trajectory) model can be de
rived along with their arbitrary constants. Moreover, this theory provides
a detailed formulation for breakup phenomena after two droplets collide. Fi
nally, it is shown on the basis of this theory that the atomization process
es of fuel coming from ancient living systems are similar to cell prolifera
tion mathematically. The integrated research including liquid atomizations
and actual biological cell divisions will bring us ways out of impasses for
each field, since the target of both research fields is faster breakup of
hydrocarbon droplets.