The matter Lagrangian of an ideal fluid
General Relativity and Quantum Cosmology
2021-01-05 v2
Abstract
We show that the matter Lagrangian of an ideal fluid equals (up to a sign -depending on its definition and on the chosen signature of the metric) the total energy density of the fluid, i.e. rest energy density plus internal energy density.
Cite
@article{arxiv.2011.04175,
title = {The matter Lagrangian of an ideal fluid},
author = {S. Mendoza and S. Silva},
journal= {arXiv preprint arXiv:2011.04175},
year = {2021}
}
Comments
5 pages, accepted for publication in: International Journal of Geometric Methods in Modern Physics (IJGMMP)