Reactions
Use the Reactions node to account for the consumption or production of species through chemical reactions in the fracture. Define the rate expressions as required.
Boundary Selection
From the Selection list, choose the boundaries on which to define rate expression or expressions that govern the source term in the transport equations.
Several reaction nodes can be used to account for different reactions in different parts of the fracture.
Reaction Rates
Add a rate expression Ri for species i. Enter a value or expression in the field. Note that if you have the Chemistry interface available, included with the Chemical Reaction Engineering Module, the reaction rate expressions can be automatically generated and picked up using the drop-down list.
Reacting Volume
When specifying reaction rates for a species in a fracture, the specified reaction rate may have the basis of the pore volume of the fracture, or the total volume.
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For Total volume, the reaction expressions in are specified per unit volume of the fracture. The reaction expressions will be multiplied by the fracture thickness dfr.
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For Pore volume, the reaction expressions in mol/(m3·s) are specified per unit volume of total pore space in the fracture. The reaction expressions will be multiplied by the fracture thickness dfr and the fracture porosity, εp.