Some Magnetized Bulk Viscous String Cosmological Models in Cylindrically Symmetric Inhomogeneous Universe with Variable Λ-Term

某圆柱体的联盟者对称不同类粘滞液体绳有磁场并且宇宙论的术语 Λ 与时间变化的宇宙论的模型被调查。得到确定的解决方案，在模型的扩大(θ ) 与 shear 张肌 σ 11 成正比，这被假定 > j i 。为模型的宇宙论的常数的价值被发现小、积极，它被结果从最近的 supernovae Ia 观察支持。体积粘性的效果是在答案的特性上的完美的液体和因此展览必需品影响生产一个变化。模型的物理、几何的性质也在磁场的存在和缺席被讨论。

Some cylindrically symmetric inhomogeneous viscous fluid string cosmological models with magnetic field and cosmological term A varying with time are investigated. To get the deterministic solution, it has been assumed that the expansion （θ） in the model is proportional to the eigen value σ^11 of the shear tensor σ^ij. The value of cosmological constant for the model is found to be small and positive, which is supported by the results from recent supernovae Ia observations. The effect of bulk viscosity is to produce a change in perfect fluid and hence exhibits essential influence on the character of the solution. The physical and geometric properties of the models are also discussed in presence and absence of magnetic field.