is dimensionless time,
are the dimensionless concentration of reactant
and the temperature in reactor
is the Damköhler number, and
is the ratio of reactor volumes
; the other parameters are dimensionless numbers defined in . A constant inlet concentration of
to the first reactor results in a periodic inlet concentration of
to the second reactor and an outlet concentration that may be periodic, quasi-periodic, or chaotic, depending on the choice of parameters.