Use this window to define the mass transfer coefficient for the crystal dissolution rate.
By default, the Mass Transfer Coefficient will be Calculated from Diffusivity using Treybal’s Correlation. This means that a liquid diffusivity method must be selected in the Thermodynamic Data. Alternatively the coefficient may be Calculated from Mass Transfer Coefficient Equation and you must supply the equation parameters.
When the Calculated from Mass Transfer Coefficient Equation option is selected, you must supply the Akc and Bkc coefficients for the equation. Akc is in units of m2/sec and Bkc is in meters. The coefficient is in units of m/sec. The Thereshold Diameter (Dkc) defaults to 0.002 m. If the particle diameter is less than Dkc, then it is used as the denominator in the equation. Otherwise, Dkc is used as the denominator.
Alternatively, instead of entering a numeric value for Akc and Bkc, they may be referenced using the Define system relative to any available unit operation or stream parameter calculated elsewhere in the simulation.
The Dissolver Dissolution Rate window is accessed by pressing the Dissolution Rate button on the Dissolver Main Window .
Related Topics