Ø The process is in steady state, which means that Ža.
mass does not accumulate in the balance volume, and
Žb. the number of crystals entering and leaving the
balance volume are equal.
Ø The inlet solution already contains small crystals.
Ø No nucleation or growth rate dispersion takes place.
These assumptions are fairly rough simplifications.
Ø No breakage of crystals takes place.
Ø Plug flow conditions prevail. This assumption is
discussed in Section 4