English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Viscous accretion flow around a rotating supermassive black hole sitting in aquintessence tub is studied in this article. To introduce such a dark energycontaminated black hole's gravitational force, a new pseudo-Newtonian potentialis used. This pseudo-Newtonian force can be calculated if we know the distancefrom the black hole's center, spin of the black hole and equation of state ofthe quintessence inside which the black hole is considered to lie. This forcehelps us to avoid complicated nonlinearity of general relativistic fieldequations. Transonic, viscous, continuous and Keplerian flow is assumed to takeplace. Fluid speed, sonic speed profile and specific angular momentum toKeplerian angular momentum ratio are found out for different values of spinparameter and quintessence parameter. Density variation is built and talliedwith observations. Shear viscosity to entropy density ratio is constructed forour model and a comparison with theoretical lower limit is done.

Accretion onto a Quintessence Contaminated Rotating Black Hole : Violating the Lower Limit for Eta over s