Inhomogeneous and Radiating Composite Fluids

Entropy

Rituparno Goswami¹  Sunil D. Maharaj¹  Byron P. Brassel¹ 

[1] Astrophysics Research Centre, School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa;

关键词: composite fluids;    energy conditions;   

DOI  :  10.3390/e23111400

来源: DOAJ

【 摘 要 】

We consider the energy conditions for a dissipative matter distribution. The conditions can be expressed as a system of equations for the matter variables. The energy conditions are then generalised for a composite matter distribution; a combination of viscous barotropic fluid, null dust and a null string fluid is also found in a spherically symmetric spacetime. This new system of equations comprises the energy conditions that are satisfied by a Type I fluid. The energy conditions for a Type II fluid are also presented, which are reducible to the Type I fluid only for a particular function. This treatment will assist in studying the complexity of composite relativistic fluids in particular self-gravitating systems.

【 授权许可】

Unknown