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Numerical Simulation of Viscous Shocked Accretion Flows Around Black Holes

  • Book
  • © 2015

Overview

Authors:
  1. Kinsuk Giri

    1. National Tsing Hua University, Taiwan, China

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  • Nominated for Springer Theses by S.N. Bose National Research Centre for Basic Sciences, Kolkata, India
  • Instead of assumptions of toy models, this thesis contains step-by-step numerically simulated results to verify the existence of theoretical self-consistent generalized viscous transonic flow shock solutions
  • Demonstrates that the latest ‘Avatar’ of the accretion/outflow picture, the Generalized Two Component Advective Flow (GTCAF), is capable of explaining almost all the black hole observational results
  • Addresses the challenge of approximating the turbulent viscosity
  • Includes supplementary material: sn.pub/extras

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (8 chapters)

  1. Front Matter

    Pages i-xxii
    Download chapter PDF

  2. Introduction

    • Kinsuk Giri
    Pages 1-28

  3. Overview of Numerical Simulations on Accretion Processes and Our Objectives

    • Kinsuk Giri
    Pages 29-42

  4. Governing Equations and Computational Methods

    • Kinsuk Giri
    Pages 43-67

  5. Simulation Procedure and the Test of the Code

    • Kinsuk Giri
    Pages 69-75

  6. Simulation for Inviscid Sub-Keplerian Flows and Shocks

    • Kinsuk Giri
    Pages 77-90

  7. Simulation of Viscous Accretion Flows

    • Kinsuk Giri
    Pages 91-110

  8. Effects of Power-Law Cooling in Viscous Flows

    • Kinsuk Giri
    Pages 111-124

  9. Conclusions and Future Plans

    • Kinsuk Giri
    Pages 125-129
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Keywords

About this book

The work developed in this thesis addresses very important and relevant issues of accretion processes around black holes. Beginning by studying the time variation of the evolution of inviscid accretion discs around black holes and their properties, the author investigates the change of the pattern of the flows when the strength of the shear viscosity is varied and cooling is introduced. He succeeds to verify theoretical predictions of the so called Two Component Advective Flow (TCAF) solution of the accretion problem onto black holes through numerical simulations under different input parameters. TCAF solutions are found to be stable. And thus explanations of spectral and timing properties (including Quasi-Period Oscillations, QPOs) of galactic and extra-galactic black holes based on shocked TCAF models appear to have a firm foundation.

Authors and Affiliations

  • National Tsing Hua University, Taiwan, China

    Kinsuk Giri

About the author

Dr. Kinsuk Giri performed his research for his PhD thesis at S.N. Bose National Research Centre for Basic Sciences in Kolkata, India, under supervision of Prof. S.K. Chakrabarti. He was awarded his PhD from Jadavpur University in 2013. Afterwards he took up a postdoc position at the Institute of Astronomy, National Tsing Hua University Hsinchu, Taiwan.

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