Journal
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
Volume 52, Issue 4, Pages 1160-1164Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10773-012-1431-0
Keywords
FRW cosmology; Bulk viscosity; Chaplygin gas
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In this work we study viscous Chaplygin gas and obtain modified Friedmann equations due to viscosity. We calculate time-dependent energy density for the case of non-flat universe. By using stability condition and speed of sound we find critical value of viscosity coefficient where speed of sound is finite.
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