[mesa-users] energies and enthalpies

David Arnett wdarnett at gmail.com
Tue Aug 20 23:26:51 EDT 2013

The binding energy is as Josiah said; there is no P/\rho term. Enthalpy is
relevant when considering flow in a fixed Eulerian mesh.
That is what you use for a wind flowing through a fixed mesh. For
Lagrangian flow, e.g., a given MESA star model, use energy. I suspect that
in the Eulerian case you can make the enthalpy work (satisfy conservation
laws) if you do boundary conditions carefully.

David Arnett
Regents Professor
Steward Observatory
University of Arizona

Facts are stubborn, but statistics are more pliable.  Mark Twain
Facts do not cease to exist because they are ignored.  Aldous Huxley
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