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sci.film-theory-mass-transfer Calculator
Calculates mass transfer coefficient k_L from film theory: k_L = D/δ, where D is diffusivity and δ is film thickness from penetration theory or empirical correlations. Typical liquid-film coefficient k_L ≈ 10⁻⁵ to 10⁻⁴ m/s — bubble columns have k_L ≈ 2–5 × 10⁻⁴ m/s due to turbulent bubble-induced mixing.
Inputs
D Ab M2 S
Reference formula or conversion factor shown for context.
Delta M
Perpendicular measurement through the material. For insulation: thicker is better. For beams: directly affects bending resistance.
C Bulk Mol M3
Amount of solute per unit volume. Higher concentration = more solute dissolved.
C Surface Mol M3
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Results
mass transfer coefficient kc (m/s)
The computed mass of the object or substance.
molar flux N_A (mol/m²/s)
Sample size or count used in the calculation.
kc = D/δ
Reference formula or conversion factor shown for context.