๐ Mass Transfer
Analyze binary mass diffusion and heat-mass transfer boundary layer analogies. All calculations are powered by Fortran for high-precision numerical results.
Mass Diffusion โ Fick's Law & Stagnant Film
Solve binary mass diffusion equations. Supports Equimolar Counter-Diffusion (Fick's law) and Stefan stagnant film diffusion with molar flux, concentration, and mole fraction profiles.
Heat & Mass Transfer Analogy
Evaluate Sherwood and Schmidt numbers, Chilton-Colburn analogy correlations, and convective mass transfer coefficients using boundary layer analogy relations.
Packed Bed Absorption Column
Size packed gas absorption columns using Henry's law equilibrium, Kremser theoretical-stage estimates, and the NTU-HTU height method.
Binary Diffusivity Estimator
Estimate binary diffusion coefficients (D_AB) for gas pairs using Chapman-Enskog theory and for dilute solutes in liquids using Wilke-Chang equations.
Convective Mass Transfer
Calculate convective mass transfer coefficients, Sherwood numbers, Schmidt numbers, and mass transfer fluxes for various geometries and flow regimes.
Evaporation & Humidification
Model convective evaporation rates of water pools or droplets, air humidification kinetics, and mass transfer boundary layers under varied wind speeds.
Transient Diffusion in Solids
Compute transient concentration profiles, fractional saturation, and total mass transfer over time for slabs, cylinders, or spheres under convective resistance.
Adsorption Isotherms Solver
Fit and evaluate Langmuir, Freundlich, and BET isotherms. Estimate specific surface areas, monolayer capacities, and surface coverage.
McCabe-Thiele Distillation Column
Design binary distillation columns using relative volatility, reflux ratios, q-line feed options, and Fenske minimum stage calculations.
Liquid-Liquid Extraction Solver
Model single-stage, crosscurrent, and countercurrent extraction stages using distribution coefficients and Kremser/Hunter-Nash equations.
Membrane Separation Diffusion
Estimate gas separation through dense polymers (solution-diffusion) or porous membranes (Knudsen diffusion) under varied pressures.
Solid-Liquid Leaching & Washing
Calculate solute recovery from solids using single-stage washing or countercurrent multi-stage leaching underflow retention analysis.
Diffusion with Chemical Reaction
Evaluate internal diffusion limitations in porous catalyst pellets using Thiele modulus, effectiveness factor, and Weisz-Prater criteria.
Drying Rate Calculator
Estimate drying time and moisture content profiles for constant-rate and falling-rate drying periods on dry solid basis.
Gas Absorption โ Reactive Systems
Calculate reactive gas absorption rates and enhancement factor compared to physical absorption using Hatta number analysis.