Mass Flux Density Formula:
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Definition: Mass flux density represents the amount of mass transferred per unit area per unit time during crystallization processes.
Purpose: This calculator helps determine the rate at which solute molecules are incorporated into a growing crystal surface.
The calculator uses the formula:
Where:
Explanation: The formula calculates the mass transfer rate based on the driving force (concentration difference) raised to the reaction order.
Details: Accurate calculation helps in designing crystallization processes, predicting crystal growth rates, and optimizing process conditions.
Tips: Enter the reaction rate constant, interfacial concentration, equilibrium saturation value, and reaction order. All values must be positive.
Q1: What is the typical range for reaction rate constant?
A: The value varies widely (10⁻⁶ to 10² mol/(m³·s)) depending on the system and conditions.
Q2: How is interfacial concentration determined?
A: It's typically measured experimentally or estimated from bulk concentration and mass transfer coefficients.
Q3: What does the order of reaction indicate?
A: It describes how the rate depends on concentration difference (1=linear, 2=quadratic, etc.).
Q4: When would (Ci - Cx) be negative?
A: This calculator assumes positive values only, as negative values would indicate dissolution rather than growth.
Q5: How does temperature affect these parameters?
A: Temperature significantly impacts kr and equilibrium concentrations, but this calculator assumes isothermal conditions.