Inhomogeneous cosmological models - New exact solutions with dust, isotropic radiation, and electromagnetic field

1987 ◽  
Vol 317 ◽  
pp. 52 ◽  
Author(s):  
Nazira Tomimura ◽  
Ioav Waga
Keyword(s):  
Electromagnetic Field ◽  
Exact Solutions ◽  
Cosmological Models ◽  
Inhomogeneous Cosmological Models ◽  
New Exact Solutions ◽  
Isotropic Radiation

scholarly journals Inhomogeneous cosmological models: exact solutions and their applications

2011 ◽  
Vol 28 (16) ◽  
pp. 164002 ◽  
Author(s):  
Krzysztof Bolejko ◽  
Marie-Noëlle Célérier ◽  
Andrzej Krasiński
Keyword(s):  
Exact Solutions ◽  
Cosmological Models ◽  
Inhomogeneous Cosmological Models

scholarly journals The Friedmann cosmological models revisited as an harmonic motion and new exact solutions

2014 ◽  
Vol 11 (05) ◽  
pp. 1450050
Author(s):  
Rafael M. Rubio ◽  
Juan J. Salamanca
Keyword(s):  
Exact Solutions ◽  
Arbitrary Dimension ◽  
Angular Frequency ◽  
Cosmological Models ◽  
New Approach ◽  
Motion Equations ◽  
Harmonic Motion ◽  
New Exact Solutions ◽  
Einstein's Equation ◽  
Friedmann Cosmological Models

A new approach for arbitrary dimension to the Friedmann cosmological models is presented. Taking suitable changes of the parameters of the spacetime the harmonic motion equations appear, where the curvature determines the angular frequency. Some physical interpretations are also explained. As a consequence of our approach, we give new exact solutions to the Einstein's equation when the observer is not comoving with the perfect fluid, as well as, when the pressure not vanishes, including a new procedure to acquire exact solutions for cases of universes at the dark energy-dominated stage.

New Exact Solutions of Steady Plane Flows of an In Compressible Fluid of Variable Viscosity

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Sobia Younus
Keyword(s):  
Exact Solutions ◽  
Stream Function ◽  
Compressible Fluid ◽  
Variable Viscosity ◽  
Plane Motion ◽  
Transformation Technique ◽  
Vorticity Distribution ◽  
New Exact Solutions ◽  
Steady Plane ◽  
Uniform Stream

<span>Some new exact solutions to the equations governing the steady plane motion of an in compressible<span> fluid of variable viscosity for the chosen form of the vorticity distribution are determined by using<span> transformation technique. In this case the vorticity distribution is proportional to the stream function<span> perturbed by the product of a uniform stream and an exponential stream<br /><br class="Apple-interchange-newline" /></span></span></span></span>

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