Molar Heat Capacity

The molar heat capacity defines the heat capacity at constant pressure for an ideal gas. It is intended for use in fluid cavity simulations.

This page discusses:

See Also
In Other Guides
Fluid Cavity Definition

You can define the molar heat capacity in polynomial or tabular form. The polynomial form is based on the Shomate equation according to the National Institute of Standards and Technology. The constant pressure molar heat capacity can be expressed as

c ~ p = a ~ + b ~ ( θ − θ Z ) + c ~ ( θ − θ Z ) 2 + d ~ ( θ − θ Z ) 3 + e ~ ( θ − θ Z ) 2 ,

where the coefficients a ~ , b ~ , c ~ , d ~ , and e ~ are gas constants.

For tabular definition, you can specify a table of constant pressure heat capacity versus temperature and any predefined field variables.

Parameters for Polynomial Definition

Input Data Description
First modal heat capacity coefficient Gas constant, a ~ .
Second modal heat capacity coefficient Gas constant, b ~ .
Third modal heat capacity coefficient Gas constant, c ~ .
Fourth modal heat capacity coefficient Gas constant, d ~ .
Fifth modal heat capacity coefficient Gas constant, e ~ .

Parameters for Tabular Definition

Input Data Description
Use temperature-dependent data Specifies material parameters that depend on temperature. A Temperature field appears in the data table. For more information, see Specifying Material Data as a Function of Temperature and Independent Field Variables.
Number of field variables Specifies material parameters that depend on field variables. Field columns appear in the data table for each field variable you add. For more information, see Specifying Material Data as a Function of Temperature and Independent Field Variables.
Molar heat capacity Amount of heat required to raise 1 mole of the selected material by 1 Kelvin.