modelMaxwellStefan
Maxwell-Stefan equations, no film reaction
Extends from ThermalSeparation.FilmModel.BaseClasses.BaseFilmModel (base class for film model where no source term for the reaction exists).
Information
In this class the molar flow rates between bulk and film are calculated using the Maxwell-Stefan equation. They supply an equation for N_dot for nSL-1 and nSV-1 components respectively (called rate equations). The missing equations are the summation equations at the phase boundary. The matrix R in the rate equations can be obtained from the binary mass transfer coefficients (see ComputeR). The correlations for the mass transfer coefficients are dependent on the column geometry. Therefore this model has to be instantiated for each different column type: StructuredPackedColumn.MS, RandomPackedColumn.MS, SprayColumn.MS and TrayColumn.MS. In these child classes the equations for mass transfer coefficients and interfacial area are provided.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nSL (from BaseFilmModel) | MediumLiquid.nSubstance | |
| Integer | nSV (from BaseFilmModel) | MediumVapour.nSubstance | |
| Boolean | enableDialog (from BaseFilmModel) | true | |
| Boolean | StartUp_CCS (from BaseFilmModel) | false | |
| Boolean | EQ (from BaseFilmModel) | ||
| Boolean | MS_smooth | false | |
| Propagated from Column › These variables are propagated from the column model and do not have to be set by the user! | |||
| Boolean[nSV] | inertVapour (from BaseFilmModel) | fill(false, nSV) | |
| Boolean[nSL] | inertLiquid (from BaseFilmModel) | fill(false, nSL) | |
| Integer | n (from BaseFilmModel) | ||
| Integer | nS (from BaseFilmModel) | ||
| Integer[nS,2] | mapping (from BaseFilmModel) | {{i, i} for i in 1:nS} | |
| SI.Temperature | T_ref (from BaseFilmModel) | ||
| Boolean | considerStartUp (from BaseFilmModel) | false | |
| SI.Time | delay_startUp (from BaseFilmModel) | 200 | |
| Boolean | smooth_startUp (from BaseFilmModel) | false | |
| Boolean[nSV] | lowBoilingPoint (from BaseFilmModel) | fill(false, nSV) | |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| MediumVapour.ThermodynamicProperties | propsVap (from BaseFilmModel) | ||
| SI.MoleFraction[n,nSV] | x_v_star (from BaseFilmModel) | ||
| MediumVapour.ThermodynamicState | stateVap (from BaseFilmModel) | ||
| SI.MoleFraction[nSV] | x_v_in (from BaseFilmModel) | ||
| SI.Concentration[n,nSV] | c_v_star (from BaseFilmModel) | ||
| SI.MoleFraction[n,nSL] | x_l (from BaseFilmModel) | ||
| SI.MoleFraction[n,nSV] | x_v (from BaseFilmModel) | ||
| SI.Pressure[n,nSL] | p_sat (from BaseFilmModel) | ||
| MediumLiquid.ThermodynamicProperties | propsLiq (from BaseFilmModel) | ||
| MediumLiquid.ThermodynamicState | stateLiq (from BaseFilmModel) | ||
| SI.MoleFraction[n,nSL] | x_l_star (from BaseFilmModel) | ||
| SI.Concentration[n,nSL] | c_l (from BaseFilmModel) | ||
| SI.Concentration[n,nSL] | c_l_star (from BaseFilmModel) | ||
| Real[n,nSL] | eta_comp (from BaseFilmModel) | ||
| Real[n,nSL] | gamma (from BaseFilmModel) | ||
| SI.MoleFraction[n,nS] | x_vap_liq (from BaseFilmModel) | ||
| SI.Concentration[nSV] | c_v_in (from BaseFilmModel) | ||
| SI.Concentration[n,nSV] | c_v (from BaseFilmModel) | ||
| SI.VolumeFlowRate | Vdot_v_in (from BaseFilmModel) | ||
| SI.VolumeFlowRate[n] | Vdot_v (from BaseFilmModel) | ||
| SI.VolumeFlowRate[n] | Vdot_l (from BaseFilmModel) | ||
| Real[n] | eps_liq (from BaseFilmModel) | ||
| SI.MolarFlowRate[n,nSL] | Ndot_l_transfer (from BaseFilmModel) | ||
| SI.MolarFlowRate[n,nSV] | Ndot_v_transfer (from BaseFilmModel) | positive when entering the bulk phase | |
| SI.HeatFlowRate[n] | Edot_l_transfer (from BaseFilmModel) | ||
| SI.HeatFlowRate[n] | Edot_v_transfer (from BaseFilmModel) | ||
| SI.Pressure[n + 1] | p_hyd (from BaseFilmModel) | ||
| SI.Pressure[n + 1] | p_v (from BaseFilmModel) | ||
| SI.Temperature[n] | T_star (from BaseFilmModel) | ||
| Real[n] | omega (from BaseFilmModel) | ||
| Boolean[n] | startUp (from BaseFilmModel) | ||
| Boolean[n] | before_transition (from BaseFilmModel) | ||
| Real | k (from BaseFilmModel) | ||
| Real[n,nSL] | rel_dev_liq (from BaseFilmModel) | relative deviation from equilibrium, liquid | |
| Real[n,nSV] | rel_dev_vap (from BaseFilmModel) | relative deviation from equilibrium, vapour | |
| Real | max_rel_dev_liq (from BaseFilmModel) | max(rel_dev_liq) | maximum relative deviation from equilibrium, liquid |
| Real | max_rel_dev_vap (from BaseFilmModel) | max(rel_dev_vap) | maximum relative deviation from equilibrium, vapour |
| HomotopyMethod | homotopyMethod (from BaseFilmModel) | ||
| SI.Density[n] | rho_v | propsVap.rho | |
| SI.MolarMass[n] | MM_v | propsVap.MM | |
| ThermoEquilibrium[n] | thermoEquilibrium | ||
| Real[n,nS] | K | equilibrium constant | |
| StateSelection | stateSelection | ||
| MediumLiquid.ThermodynamicFactor[n] | thermoFactorL | ||
| MediumVapour.ThermodynamicFactor[n] | thermoFactorV | ||
| MediumLiquid.CalcSpecificEnthalpy[n] | liqToFilmB | ||
| MediumLiquid.CalcSpecificEnthalpy[n] | filmToLiqB | ||
| MediumVapour.CalcSpecificEnthalpy[n] | vapToFilmB | ||
| MediumVapour.CalcSpecificEnthalpy[n] | filmToVapB | ||
| SI.CoefficientOfHeatTransfer[n] | alphaLiq | ||
| SI.CoefficientOfHeatTransfer[n] | alphaVap | ||
| Real[n,nSV,nSV] | k_v | ||
| Real[n,nSL,nSL] | k_l | ||
| SI.Area[n] | A_I | interfacial area | |
| MaxwellStefanMatrix | maxwellStefanMatrixVap | ||
| MaxwellStefanMatrix | maxwellStefanMatrixLiq | ||
| Real[n,nSL - 1,nSL - 1] | R_l | maxwellStefanMatrixLiq.matrix | |
| Real[n,nSV - 1,nSV - 1] | R_v | maxwellStefanMatrixVap.matrix |
Contents
| Name | Description |
|---|---|
| ThermoEquilibrium | |
| StateSelection |