You can use FLUENT to predict the discrete phase patterns based on a fixed continuous phase flow field (an uncoupled approach or "one-way coupling"), or you can include the effect of the discrete phase on the continuum (a coupled approach or "two-way coupling"). In the coupled approach, the continuous phase flow pattern is impacted by the discrete phase (and vice versa), and you can alternate calculations of the continuous phase and discrete phase equations until a converged coupled solution is achieved. See Section 22.9.1 for details.
Using FLUENT's discrete phase modeling capability, reacting particles or droplets can be modeled and their impact on the continuous phase can be examined. Several heat and mass transfer relationships, termed "laws'', are available in FLUENT and the physical models employed in these laws are described in this section.