[newbie384]

According to ANSYS documentation, static enthalpy is defined as hs=specific heat capacity at constant pressure (cp) * static temperature. (there is a second term in the equation but it is neglected due to the use of ideal gas according to documentation)

I defined a variable of hs by using the formula stated above and calculate the mass flow average of it on a isosurface. The answer that I got is as below.
(cp=1.0044e-3 Jkg^-1K^-1 for ideal gas)

Mass Flow Average of hs on iso

massFlowAve(hs)@iso
319276 [J kg^-1]

However, if calculate the mass flow average by using the pre-defined static enthalpy in CFD post, I got a lot lower value.

Mass Flow Average of Static Enthalpy on iso

massFlowAve(Static Enthalpy)@iso
19814.4 [J kg^-1]

I calculated the mass average static temperature ad the result is as below.

Mass Flow Average of Temperature on iso

massFlowAve(Temperature)@iso
317.878 [K]

I then use the static temperature and the answer for the pre-defined static enthalphy in CFD post to calculate cp. The cp is only 62.33 Jkg^-1K^-1 and it is a lot smaller than the cp of the ideal gas (defined in cfx-pre). Therefore, I think the pre-defined static enthalpy in CFD Post is wrong. Can anyone advise on this matter? Is it because the pre-defined static enthalpy in CFD Post uses different formula?

Thank you in advance.