Bianchi type V I_h Bulk-Viscous String Cosmological Model in f(R) Gravity

Abstract

In this paper, we derive f(R) gravity field equations with the help of a spatially homogeneous and anisotropic Bianchi type-V Ih space-time, in the presence of a bulk-viscous fluid, containing one-dimensional cosmic strings. Here we obtained the solutions of the field equations, under some specific plausible physical conditions. In particular, cosmological model with bulk-viscous strings in f(R) theory of gravity is obtained by using the special law of variation for Hubble’s parameter proposed by Berman (Nuovo Cimento, B74, 182 (1983)). Some physical and kinematical properties of the models are also discussed.

Bianchi Type-<i>VI</i>₀ Cosmological Model with Special Form of Scale Factor in Sen-Dunn Theory of Gravitation

“…Anisotropic magnetized holographic Ricci dark energy cosmological models were discussed by Santhi et al [22]. Also, gravity field equations are derived by Santhi et al [23] with the help of a spatially homogeneous and anisotropic Bianchi type-space-time in a bulk-viscous fluid, containing one-dimensional cosmic strings. Hegazy [24], Satish and Venkateswarlu [25] studied various aspects with Bianchi type VI 0 cosmological models.…”

Optical Characteristics of Rectangular Cross-Section Torus Waveguide

“…Jason H. Karp, Eric J. Tremblay, and Joseph E. Ford (2010) developed a solar concentrator model that uses a waveguide and lens array (convex-planar) to improve solar cell efficiency. [9] Ali et al ( 2014) designed solar concentrators with a thin lens array and a waveguide to improve solar cell efficiency [10]. Peng, Ming, et al 2014 successfully developed lightweight waveguide fiber solar cells that can improve the power output over a wide range of tilted angles, from 0° to 80° and 100° to 180°.…”

Energy Conditions with Interacting Field in f(R) Gravity

“…3(2023) examined [25], specifically the form f (R) = R+R 2 , which is in line with theoretical constraints and cosmological data for static and spherically symmetric configurations. In contrast to the expansion scalar, shear scalar, and Hubble's parameter, the spatial volume in f (R) gravity increases exponentially with time, indicating a constant rate of expansion that matches the present-day scenario [26]. Using a special form of the Hubble parameter, researchers [27] have investigated exact solutions of spatially homogeneous Bianchi type-I cosmological models in the context of f (R) theory of gravity.…”