Abstract
The perturbation dynamics of an unbounded nonthermal self-gravitating inhomogeneous viscoelastic system composed of two-component constitutive fluids is theoretically investigated. The role of fluid turbulence, which is a highly nonlinear hydrodynamic vorticity-driven phenomenology, is included via the Larson logatropic equation of state describing nonlinear fluid pressure effects. The thermodynamics of the variable-temperature bulk fluid is included with the help of a proper heat diffusion equation. The system is coupled by the electro-gravitational Poisson equations in a closed form. A generalized linear dispersion relation (cubic in degree) is procedurally obtained using a standard technique of linear normal mode analysis. The dispersion relation stems from the rudimentary condition of non-vanishing perturbed gravitational potential in a linear order. The propagatory and dispersive features of the composite fluid perturbations are numerically explored with a special attention to the nonthermality effects. Their growth characteristics are analyzed alongside promising indication to applicability in the astro-cosmo-plasmic context.
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Authors are extremely grateful to the learned anonymous referees for helpful scientific comments and suggestions. Cooperation from Tezpur University is duly acknowledged.
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Chakraborty, R., Kumar Karmakar, P. Effect of nonthermality on the perturbation dynamics of self-gravitating complex fluids. Astrophys Space Sci 363, 225 (2018). https://doi.org/10.1007/s10509-018-3445-4
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DOI: https://doi.org/10.1007/s10509-018-3445-4