*SPECIFIC GAS CONSTANT

Keyword type: model definition, material

With this option the specific gas constant of a material can be defined. The specific gas constant is required for a calculation in which a gas dynamic network is included. The specific gas constant R is defined as

R=\mathcal{R}/M (815)

where \mathcal{R}= 8314 \;   J/(kmol\;K) is the universal gas constant and M is the molecular weight of the material. The specific gas constant is temperature independent.

First line:

• *SPECIFIC GAS CONSTANT

Following line:

• Specific gas constant.

Example:

*SPECIFIC GAS CONSTANT
287.

defines a specific gas constant with a value of 287. This value is appropriate for air if Joule is chosen for the unit of energy, kg as unit of mass and K as unit of temperature, i.e. R = 287 \;   J/(kg\;K).

Example files: linearnet, branch1, branch2.