Media Module

class pygfunction.media.Fluid(fluid_str: str, percent: float, T: float = 20.0)

Bases: object

An object for handling the fluid properties

Parameters
fluid_str: str
The mixer for this application should be one of:

  • ‘Water’ - Complete water solution

  • ‘MEG’ - Ethylene glycol mixed with water

  • ‘MPG’ - Propylene glycol mixed with water

  • ‘MEA’ - Ethanol mixed with water

  • ‘MMA’ - Methanol mixed with water

percent: float

Mass fraction of the mixing fluid added to water (in %). Lower bound = 0. Upper bound is dependent on the mixture.

T: float, optional

The temperature of the fluid (in Celcius). Default is 20 degC.

Examples

>>> import pygfunction as gt
>>> T_f = 20.     # Temp at 20 C

>>> # complete water solution
>>> fluid_str = 'Water'
>>> percent = 0
>>> fluid = gt.media.Fluid(fluid_str, percent, T=T_f)
>>> print(fluid)

>>> # 20 % propylene glycol mixed with water
>>> fluid_str = 'MPG'
>>> percent = 20
>>> fluid = gt.media.Fluid(fluid_str, percent, T=T_f)

>>> # 60% ethylene glycol mixed with water
>>> fluid_str = 'MEG'
>>> percent = 60
>>> fluid = gt.media.Fluid(fluid_str, percent, T=T_f)
>>> print(fluid)

>>> # 5% methanol mixed with water
>>> fluid_str = 'MMA'
>>> percent = 5
>>> fluid = gt.media.Fluid(fluid_str, percent, T=T_f)
>>> print(fluid)

>>> # ethanol / water
>>> fluid_str = 'MEA'
>>> percent = 10
>>> fluid = gt.media.Fluid(fluid_str, percent, T=T_f)
>>> print(fluid)
Prandlt_number()

Returns the Prandtl of the fluid.

Returns
Prfloat

Prandlt number.

append_to_dict(dnary)
density()

Returns the density of the fluid (in kg/m3).

Returns
rhofloat

Density (in kg/m3).

dynamic_viscosity()

Returns the dynamic viscosity of the fluid (in Pa.s, or N.s/m2).

Returns
mufloat

Dynamic viscosity (in Pa.s, or N.s/m2).

kinematic_viscosity()

Returns the kinematic viscosity of the fluid (in m2/s).

Returns
nufloat

Kinematic viscosity (in m2/s).

specific_heat_capacity()

Returns the specific isobaric heat capacity of the fluid (J/kg.K).

Returns
cpfloat

Specific isobaric heat capacity (J/kg.K).

thermal_conductivity()

Returns the thermal conductivity of the fluid (in W/m.K).

Returns
kfloat

Thermal conductivity (in W/m.K).

volumetric_heat_capacity()

Returns the volumetric heat capacity of the fluid (J/m3.K).

Returns
rhoCpfloat

Volumetric heat capacity (in J/m3.K).