Mixture#

class Mixture(rule, Cn, H, S, H_excess, S_excess, mu, V, kappa, Hvap, sigma, epsilon, MWs, include_excess_energies=False)[source]#

Create an Mixture object for estimating mixture properties.

Parameters:

rule (str) – Description of mixing rules used.
Cn (function(phase, mol, T)) – Molar isobaric heat capacity mixture model [J/mol/K].
H (function(phase, mol, T)) – Enthalpy mixture model [J/mol].
S (function(phase, mol, T, P)) – Entropy mixture model [J/mol].
H_excess (function(phase, mol, T, P)) – Excess enthalpy mixture model [J/mol].
S_excess (function(phase, mol, T, P)) – Excess entropy mixture model [J/mol].
mu (function(phase, mol, T, P)) – Dynamic viscosity mixture model [Pa*s].
V (function(phase, mol, T, P)) – Molar volume mixture model [m^3/mol].
kappa (function(phase, mol, T, P)) – Thermal conductivity mixture model [W/m/K].
Hvap (function(mol, T)) – Heat of vaporization mixture model [J/mol]
sigma (function(mol, T, P)) – Surface tension mixture model [N/m].
epsilon (function(mol, T, P)) – Relative permitivity mixture model [-]
MWs (1d array[float]) – Component molecular weights [g/mol].
include_excess_energies=False (bool) – Whether to include excess energies in enthalpy and entropy calculations.

Notes

Although the mixture models are on a molar basis, this is only if the molar data is normalized before the calculation (i.e. the mol parameter is normalized before being passed to the model).

See also

Mixture, IdealMixtureModel

Examples

Calculate enthalpy of evaporation for a water and ethanol mixture:

>>> from thermosteam import Mixture
>>> mixture = Mixture.from_chemicals(['Water', 'Ethanol'])
>>> mixture.Hvap([0.2, 0.8], 350)
39750.62

Calculate density for a water and ethanol mixture in g/L:

>>> from thermosteam import Mixture
>>> mixture = Mixture.from_chemicals(['Water', 'Ethanol'])
>>> mixture.get_property('rho', 'g/L', 'l', [0.2, 0.8], 350, 101325)
754.23

MW(mol)[source]#: Return molecular weight [g/mol] given molar array [mol].

rho(phase, mol, T, P)[source]#: Mixture density [kg/m^3]

Cp(phase, mol, T)[source]#: Mixture isobaric heat capacity [J/g/K]

alpha(phase, mol, T, P)[source]#: Mixture thermal diffusivity [m^2/s].

nu(phase, mol, T, P)[source]#: Mixture kinematic viscosity [m^2/s].

Pr(phase, mol, T, P)[source]#: Mixture Prandtl number [-].

xrho(phase_mol, T, P)[source]#: Multi-phase mixture density [kg/m3].

xCp(phase_mol, T)[source]#: Multi-phase mixture isobaric heat capacity [J/g/K].

xalpha(phase_mol, T, P)[source]#: Multi-phase mixture thermal diffusivity [m^2/s].

xnu(phase_mol, T, P)[source]#: Multi-phase mixture kinematic viscosity [m^2/s].

xPr(phase_mol, T, P)[source]#: Multi-phase mixture Prandtl number [-].

get_property(name, units, *args, **kwargs)[source]#

Return property in requested units.

Parameters:

name (str) – Name of stream property.
units (str) – Units of measure.
*args – Phase, material and thermal condition.
**kwargs – Phase, material and thermal condition.

H(phase, mol, T, P)[source]#: Return enthalpy [J/mol].

S(phase, mol, T, P)[source]#: Return entropy in [J/mol/K].

solve_T_at_HP(phase, mol, H, T_guess, P)[source]#: Solve for temperature in Kelvin.

xsolve_T_at_HP(phase_mol, H, T_guess, P)[source]#: Solve for temperature in Kelvin.

solve_T_at_SP(phase, mol, S, T_guess, P)[source]#: Solve for temperature in Kelvin.

xsolve_T_at_SP(phase_mol, S, T_guess, P)[source]#: Solve for temperature in Kelvin.

xCn(phase_mol, T, P=None)[source]#: Multi-phase mixture molar isobaric heat capacity [J/mol/K].

xH(phase_mol, T, P)[source]#: Multi-phase mixture enthalpy [J/mol].

xS(phase_mol, T, P)[source]#: Multi-phase mixture entropy [J/mol/K].

xV(phase_mol, T, P)[source]#: Multi-phase mixture molar volume [mol/m^3].

xmu(phase_mol, T, P)[source]#: Multi-phase mixture hydrolic [Pa*s].

xkappa(phase_mol, T, P)[source]#: Multi-phase mixture thermal conductivity [W/m/K].