Select All or one of existing pellets for the Shrinking Core Reactions node.
In the Core species reaction rate table, select the reaction rate (SI unit: mol/(m
2·s)) for solid species under column
Surface reaction rate. The reaction rate could be coupled to Chemistry with the
Define variables for porous pellets (under
Pellet Chemistry section) being checked. With
User defined being selected from column
Surface reaction rate, enter a reaction rate expression under the column
Surface rate expression (mol/(m^2*s)).
Select bulk species reaction rate (or molar flux, SI unit: mol/(m
2·s)) for bulk species
i from
Jpe, i list. The reaction rate could be picked up from Chemistry with
Define variables for porous pellets being checked. Enter a reaction rate expression when
User defined is selected from the list.
Specify the Heat source originating from the heat (Qs
Rc) of surface reactions on the core surface. With several pellets being added, their heat sources will be summed up.
The heat sources are most conveniently picked up from a Chemistry interface (with the Define variables for porous pellets selected under Pellet Chemistry section) that defines the heat of surface reactions. In that case, the heat source expression can be selected from the list. Otherwise you can enter an expression in the text field.