8.7 Specific Heat Capacity

The specific heat capacity must be defined when the energy equation is active. ANSYS FLUENT provides several options for definition of the heat capacity:

• constant heat capacity

• temperature- and/or composition-dependent heat capacity

• kinetic theory

Each of these input options and the governing physical models are detailed in this section. In all cases, you will define the Cp in the Create/Edit Materials dialog box.

Materials

Specific heat capacity is input in units of J/kg-K in SI units or BTU/lbm- $^\circ$R in British units.

For combustion applications, a temperature-dependent specific heat is recommended.