%0 Journal Article
%T Polytropic Bulk Viscous Cosmological Model with Variable <i>G</i> and ¦«
%A R. K. Tiwari
%A Mukesh Sharma
%A Sonia Sharma
%J Open Access Library Journal
%V 1
%N 5
%P 1-8
%@ 2333-9721
%D 2014
%I Open Access Library
%R 10.4236/oalib.1100729
%X <p>
	<span>We
consider a Bianchi type-I Polytropic bulk viscous fluid cosmological model with
variable <i>G</i> and ¦«. To get a deterministic
model, it is assumed that<img src="http://www.oalib.com:80/image/DEF_PAPERATTACHED_PATH/20140825133157_998.png" alt="" /></span><span>and <img src="http://www.oalib.com:80/image/DEF_PAPERATTACHED_PATH/20140825133221_416.png" alt="" /></span><span>, <img src="http://www.oalib.com:80/image/DEF_PAPERATTACHED_PATH/20140825133233_857.png" alt="" /></span><span>, <img src="http://www.oalib.com:80/image/DEF_PAPERATTACHED_PATH/20140825133249_825.png" alt="" /></span><span>, where <img src="http://www.oalib.com:80/image/DEF_PAPERATTACHED_PATH/20140825133325_481.png" alt="" /></span><span>is the pressure, <i>¦Ñ</i> is the energy density, <i>¦Ç</i> is the coefficient of bulk viscosity, <i>¦Á</i>, <i>k</i>, <i>¦Ã</i> and <i>¦Ç<sub>o</sub></i> are
constants, <i>H</i> is Hubble constant, <img src="http://www.oalib.com:80/image/DEF_PAPERATTACHED_PATH/20140825133415_469.png" alt="" /></span><span>where <i>k</i><sub>1</sub> &gt; 0, <i>k</i><sub>2</sub> &gt; 0. The
solution obtained lead to inflationary phase and the results obtained match
with the observations&nbsp;</span><span>[31]&nbsp;</span><span>[32]</span><span></span><span><span></span></span><span>. The case <i>n</i> = 1 for <i>¦Á</i> = 1 is also
discussed, relating the results with the observations.</span> 
</p>
%K Bianchi Type-I Space Time
%K Bulk Viscosity
%K Shear Scalar
%K Expansion Scalar
%U http://www.oalib.com/paper/3098653