### Abstract

After extending some existing solutions of the Bianchi type I cosmological models with a viscous fluid to higher-dimensional theory, we use a simple algorithm to determine all Hubble functions therein. Emphasis is placed on the fact that although the shear scale function shall always decrease with cosmic time t and approach zero faster than t^{-2}, both the non-positive Hubble function and non-negative Hubble function can be contained in a solution of some anisotropic cosmological models with viscosity. Thus the cosmological dimensional reduction may work in higher-dimensional cosmological models with a viscous fluid.

Original language | English |
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Pages (from-to) | 21-25 |

Number of pages | 5 |

Journal | Physics Letters A |

Volume | 136 |

Issue number | 1-2 |

DOIs | |

Publication status | Published - 1989 Mar 20 |

### All Science Journal Classification (ASJC) codes

- Physics and Astronomy(all)

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## Cite this

Huang, W-H. (1989). Isotropization and cosmological dimensional reduction in the cosmological models with a viscous fluid.

*Physics Letters A*,*136*(1-2), 21-25. https://doi.org/10.1016/0375-9601(89)90668-3