Page 132 - ansys

The Phase Interaction Dialog Box for Mass Transfer

1. Click the Mass tab in the Phase Interaction dialog box.

2. Specify the Number of Mass Transfer Mechanisms. You can include any number of mass transfer
mechanisms in your simulation. Note also that the same pair of phases can have multiple mass
transfer mechanisms and you have the ability to activate and deactivate the mechanisms of your
choice.
3. For each mechanism, specify the phase of the source material under From Phase.

4. If species transport is part of the simulation, and the source phase is composed of a mixture
material, then specify the species of the source phase mixture material in the corresponding
Species drop-down list
5. For each mechanism, specify the phase of the destination material phase under To Phase.
6. If species transport is part of the simulation, and the destination phase is composed of a mixture
material, then specify the species of the destination phase mixture material in the corresponding
Species drop-down list.

7. For each mass transfer mechanism, select the desired mass transfer correlation under
Mechanism. The following choices are available:
w Constant-rate enables a constant, unidirectional mass transfer.

w User-defined allows you to implement a correlation reflecting a model of your choice, through a
user-defined function.

w Population-balance allows you to model flow where a number density function is introduced to
account for the particle population. With the aid of particle properties (e.g., particle size, porosity,
composition, etc.), different particles in the population can be distinguished and their behavior can be
described.

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