CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

Internal Energy vs. Enthalpy

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 16, 2020, 10:58
Default Internal Energy vs. Enthalpy
  #1
Member
 
Tommaso M.
Join Date: Sep 2018
Location: Milan, Italy
Posts: 67
Rep Power: 8
TommyM is on a distinguished road
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
TommyM is offline   Reply With Quote

Old   May 16, 2020, 13:14
Default
  #2
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,892
Rep Power: 73
FMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura about
Quote:
Originally Posted by TommyM View Post
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??
FMDenaro is offline   Reply With Quote

Old   May 16, 2020, 14:12
Default
  #3
Member
 
Tommaso M.
Join Date: Sep 2018
Location: Milan, Italy
Posts: 67
Rep Power: 8
TommyM is on a distinguished road
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.
TommyM is offline   Reply With Quote

Old   May 16, 2020, 14:32
Default
  #4
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,892
Rep Power: 73
FMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura about
Quote:
Originally Posted by TommyM View Post
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?
FMDenaro is offline   Reply With Quote

Reply

Tags
compressible flow, energy equation, enthalpy, internal energy

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Enthalpy based energy equation shahrooz.omd Main CFD Forum 6 July 19, 2015 19:04
Energy equation based on enthalpy shahrooz.omd Main CFD Forum 0 July 1, 2015 03:46
Decrease of internal energy Tobard FLUENT 6 July 11, 2011 22:04
Enthalpy for Energy Daniel Main CFD Forum 2 October 21, 2005 18:51
Energy equation and Enthalpy Martin FLUENT 1 January 25, 2001 18:11


All times are GMT -4. The time now is 03:07.