FIZIKA B 19 (2010) 2, 91-102
BIANCHI TYPE-I STIFF-FLUID TILTED COSMOLOGICAL MODEL WITH BULK VISCOSITY IN
GENERAL RELATIVITY
RAJ BALIa, PRAMILA KUMAWAT and SHALINI SHARMA
Department of Mathematics, University of Rajasthan, Jaipur-302055, India
aE-mail address:
balir5@yahoo.co.in
Received 18 February 2010; Revised manuscript received 21 April 2010
Accepted 19 May 2010 Online 3 June 2010
Bianchi type-I stiff-fluid tilted cosmological model with bulk viscosity is
investigated. To get the deterministic model of the universe, we have assumed
that the universe is filled with a stiff fluid, a condition A=(BC)n
between the metric potentials A, B, C and zq
= constant, where z is the coefficient of bulk
viscosity, q the expansion and n is a constant. The
physical and geometrical aspects of the model in the presence and absence of
bulk viscosity are discussed.
PACS numbers: 98.80.-k, 04.20.-q
UDC 524.83, 52-423
Keywords: Bianchi type-I cosmological model, stiff fluid, tilted, bulk
viscosity
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