Home Back

Molar Flux of Diffusing Component A for Equimolar Diffusion with B based on Concentration of A Calculator

Molar Flux Formula:

\[ N_A = \frac{D_{AB}}{\delta} \times (C_{A1} - C_{A2}) \]

m²/s
m
mol/m³
mol/m³

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is Molar Flux of Diffusing Component A?

Definition: Molar flux (NA) is the amount of substance (in moles) that passes through a unit area per unit time during diffusion.

Purpose: This calculator determines the molar flux of component A in an equimolar counter-diffusion system based on concentration differences.

2. How Does the Calculator Work?

The calculator uses Fick's first law of diffusion:

\[ N_A = \frac{D_{AB}}{\delta} \times (C_{A1} - C_{A2}) \]

Where:

Explanation: The flux is directly proportional to the concentration gradient and diffusion coefficient, and inversely proportional to the diffusion path length.

3. Importance of Molar Flux Calculation

Details: Accurate flux calculations are essential for designing separation processes, chemical reactors, and mass transfer equipment.

4. Using the Calculator

Tips: Enter the diffusion coefficient, film thickness, and concentrations at both positions. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is equimolar counter-diffusion?
A: It's when two components diffuse at equal molar rates in opposite directions, common in binary systems.

Q2: How do I determine the diffusion coefficient?
A: DAB can be found experimentally or estimated using empirical correlations.

Q3: What affects the film thickness?
A: Flow conditions, system geometry, and physical properties influence the boundary layer thickness.

Q4: Can this be used for non-equimolar diffusion?
A: No, this calculator is specifically for equimolar counter-diffusion cases.

Q5: What units should I use?
A: Use consistent SI units: meters for length, seconds for time, and moles per cubic meter for concentration.

Molar Flux Calculator© - All Rights Reserved 2025