Gamma

It returns the fundamental derivative of gas dynamics:

 

images/FluidProp00000028.gif,

 

given 2 input thermodynamic variables as defined by the InputSpec argument.

 

Default unit: -

 

The general syntax for programs like Excel and programming languages like Fortran is:

images/FluidProp00090004.gif = Gamma( FluidObj, InputSpec, Value1, Value2, ErrorMsg)

The syntax for object oriented programming languages like VB, C++ and Matlab is:

images/FluidProp00090004.gif = FluidObj.Gamma( InputSpec, Value1, Value2, ErrorMsg)

 

Arguments:

FluidObj:

In Excel it is the variable returned by SetFluid, in other programs or programming environments it is an object variable created at runtime.

InputSpec:

String

Value1:

Double

Value2:

Double

ErrorMsg:

String

 

Excel Example:

 

images/FluidProp00090004.gif = Gamma( A1, "PT", 12.53, 253.42)

 

Notes: A1 is a cell containing the value returned by SetFluid.

The error message is not in the arguments list; in case an error occurs during the calculation, the value returned by the function is a string containing the error description.

The possible input specifications are listed in the table of available Thermodynamic State definitions.