Vanishing condition for the heat flux and slow evolution of a spherically fluid distribution

7th International Congress of Engineering Physics

物理学;工业技术

Romero-Muñoz, M.^1 ; Dagdug, L.^1 ; Chacón-Acosta, G.^2

Physics Department, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, México D.F.

09340, Mexico^1

Applied Mathematics and Systems Department, Universidad Autónoma Metropolitana-Cuajimalpa, A. Vasco de Quiroga 4871, México D.F.

05348, Mexico^2

关键词: Energy condition;    Energy-momentum tensor;    Entropy production;    Fluid distribution;    Local coordinate;    Lorentz transformations;    Second Law of Thermodynamics;    Symmetric distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/582/1/012044/pdf
DOI  :  10.1088/1742-6596/582/1/012044

学科分类：工业工程学

来源: IOP

【 摘 要 】

Recently, it has been found conditions for the heat flux where its introduction into the energy-momentum tensor, given his no mechanical nature, has no problems [1]. This has been achieved by checking the validity of the second law of thermodynamics in a fluid that is boosted by a Lorentz transformation of a non-commoving frame [2]. It is known that the condition, that turns out to be the null energy condition, involves the presence of a set of reference frames where Landau-Lifshitz frame is one of them. Moreover the entropy production remains positive, implying that there are no problems or issues that violate the second law of thermodynamics. In the present contribution we review the above condition, and apply it for a self-gravitating relativistic fluid in a spherically symmetric distribution in pure local coordinates. We find that our condition influences Schwarzschild fields, relating the condition of slow evolution with thermal quantities of the fluid.