Internal Energy vs. Enthalpy

TommyM · May 16, 2020, 10:58

Hi All,

As far as I know, energy equation is preferred in the form of internal energy for solving highly compressible flows, while the enthalpy form is preferred for subsonic flows.
Does anyone know why?
Thanks in advance.

Tommy

FMDenaro · May 16, 2020, 13:14

Quote:

Originally Posted by TommyM

Hi All,

As far as I know, energy equation is preferred in the form of internal energy for solving highly compressible flows, while the enthalpy form is preferred for subsonic flows.
Does anyone know why?
Thanks in advance.

Tommy

Where is a reference for this assumption??

TommyM · May 16, 2020, 14:12

Unfortunately, I did not found it on any reference, but only on the slides of a professor. Thus, I would like to know if this assumption is true and, if it is so, why.

FMDenaro · May 16, 2020, 14:32

Quote:

Originally Posted by TommyM

Unfortunately, I did not found it on any reference, but only on the slides of a professor. Thus, I would like to know if this assumption is true and, if it is so, why.

A link to those slides?

May 16, 2020, 10:58	Internal Energy vs. Enthalpy	#1
TommyM Member Tommaso M. Join Date: Sep 2018 Location: Milan, Italy Posts: 67 Rep Power: 8	Hi All, As far as I know, energy equation is preferred in the form of *internal energy* for solving highly compressible flows, while the *enthalpy* form is preferred for subsonic flows. Does anyone know why? Thanks in advance. Tommy

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May 16, 2020, 14:12		#3
TommyM Member Tommaso M. Join Date: Sep 2018 Location: Milan, Italy Posts: 67 Rep Power: 8	Unfortunately, I did not found it on any reference, but only on the slides of a professor. Thus, I would like to know if this assumption is true and, if it is so, why.