aerosandbox.atmosphere.thermodynamics.gas
=========================================

.. py:module:: aerosandbox.atmosphere.thermodynamics.gas


Attributes
----------

.. autoapisummary::

   aerosandbox.atmosphere.thermodynamics.gas.universal_gas_constant
   aerosandbox.atmosphere.thermodynamics.gas.g


Classes
-------

.. autoapisummary::

   aerosandbox.atmosphere.thermodynamics.gas.PerfectGas


Module Contents
---------------

.. py:data:: universal_gas_constant
   :value: 8.31432


.. py:class:: PerfectGas(pressure = 101325, temperature = 273.15 + 15, specific_heat_constant_pressure = 1006, specific_heat_constant_volume = 717, molecular_mass = 0.0289644, effective_collision_diameter = 3.65e-10)

   Provides a class for an ideal, calorically perfect gas.

   Specifically, this gas:
       * Has PV = nRT (ideal)
       * Has constant heat capacities C_V, C_P (independent of temperature and pressure).
       * Is in thermodynamic equilibrium
       * Is not chemically reacting
       * Has internal energy and enthalpy purely as functions of temperature


   .. py:attribute:: pressure
      :value: 101325



   .. py:attribute:: temperature
      :value: 288.15



   .. py:attribute:: specific_heat_constant_pressure
      :value: 1006



   .. py:attribute:: specific_heat_constant_volume
      :value: 717



   .. py:attribute:: molecular_mass
      :value: 0.0289644



   .. py:attribute:: effective_collision_diameter
      :value: 3.65e-10



   .. py:method:: __repr__()


   .. py:property:: density


   .. py:property:: speed_of_sound


   .. py:property:: specific_gas_constant


   .. py:property:: ratio_of_specific_heats


   .. py:method:: specific_enthalpy_change(start_temperature, end_temperature)

      Returns the change in specific enthalpy that would occur from a given temperature change via a thermodynamic
      process.

      :param start_temperature: Starting temperature [K]
      :param end_temperature: Ending temperature [K]

      Returns: The change in specific enthalpy, in J/kg.




   .. py:method:: specific_internal_energy_change(start_temperature, end_temperature)

      Returns the change in specific internal energy that would occur from a given temperature change via a
      thermodynamic process.

      :param start_temperature: Starting temperature [K]
      :param end_temperature: Ending temperature [K]

      Returns: The change in specific internal energy, in J/kg.




   .. py:property:: specific_volume

      Gives the specific volume, often denoted `v`.

      (Note the lowercase; "V" is often the volume of a specific amount of gas, and this presents a potential point
      of confusion.)


   .. py:property:: specific_enthalpy

      Gives the specific enthalpy, often denoted `h`.

      Enthalpy here is in units of J/kg.


   .. py:property:: specific_internal_energy

      Gives the specific internal energy, often denoted `u`.

      Internal energy here is in units of J/kg.


   .. py:method:: process(process = 'isentropic', new_pressure = None, new_temperature = None, new_density = None, enthalpy_addition_at_constant_pressure = None, enthalpy_addition_at_constant_volume = None, polytropic_n = None, inplace=False)

      Puts this gas under a thermodynamic process.

      Equations here: https://en.wikipedia.org/wiki/Ideal_gas_law

      :param process: Type of process. One of:

                      * "isobaric"
                      * "isochoric"
                      * "isothermal"
                      * "isentropic"
                      * "polytropic"

                      The `process` must be specified.
      :param You must specifiy exactly one of the following arguments:
                                                                       * `new_pressure`: the new pressure after the process [Pa].
                                                                       * `new_temperature`: the new temperature after the process [K]
                                                                       * `new_density`: the new density after the process [kg/m^3]
                                                                       * `enthalpy_addition_at_constant_pressure`: [J/kg]
                                                                       * `enthalpy_addition_at_constant_volume`: [J/kg]
      :param polytropic_n: If you specified the process type to be "polytropic", you must provide the polytropic index
      :param `n` to be used here. (Reminder: PV^n = constant)
      :param inplace: Specifies whether to return the result in-place or to allocate a new PerfectGas object in memory
      :param for the result.:

      :returns: If `inplace` is False (default), returns a new PerfectGas object that represents the gas after the change.

                If `inplace` is True, nothing is returned.



.. py:data:: g
   :value: []