modelRochaStructured
structured packing - Rocha et al.
Extends from BaseLiqMT (base model for liquid mass transfer coefficient).
Information
The binary mass transfer coefficients are calculated according to [1]. The correlation is suitable for structured packings.
[1] Rocha, Bravo, Fair: Distillation Columns Containing Structured Packings: A comprehensive model for their performance. 2. Mass Transfer Model, Ind. Eng. Chem. Res., 1996, 35, 1660-1667
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | n (from BaseLiqMT) | ||
| Integer | n_k (from BaseLiqMT) | number of calculated mass transfer coefficients - nSL or k | |
| Real | omega_k | 0.05 | large value if change between constant and variable shall be steep |
| Real | omega_time | 200 | Wendepunkt der tanh-Funktion |
| Real | k_const | 6e-5 | constant value to start with |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Geometry | geometry (from BaseLiqMT) | ||
| SI.SurfaceTension[n] | sigma (from BaseLiqMT) | ||
| SI.Velocity[n] | w_sup (from BaseLiqMT) | superficial vapour velocity | |
| SI.DynamicViscosity[n] | eta (from BaseLiqMT) | ||
| SI.Density[n] | rho (from BaseLiqMT) | ||
| SI.DiffusionCoefficient[n,n_k] | D (from BaseLiqMT) | ||
| Real[n] | eps_liq (from BaseLiqMT) | ||
| ThermalSeparation.Units.CoefficentOfMassTransfer[n,n_k] | k (from BaseLiqMT) | ||
| SI.Velocity[n] | w_eff | effective liquid velocity | |
| Real | omega | 1 |
Revisions
Documentation last revised: 18.7.2011