Consider a first-order reaction

in a real reactor where chemical reaction and dispersion are occurring. The Demonstration plots the ratio

of the volumes of the real and plug flow reactors as a function of

, where

is the reactor's conversion. You can change the value of the dispersion dimensionless group

, where

is the dispersion coefficient due to axial mixing,

is the reactor's length, and

is the fluid's velocity. With

near zero one recovers the plug flow behavior. As

, the behavior of a mixed flow reactor is observed.