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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/238

Title: ACCRETION PROBLEM IN A KERR BLACK HOLE GEOMETRY VIEWED AS FLOWS IN CONVERGING–DIVERGING DUCTS
Authors: CHAKRABARTI, K
MAJUMDAR, M M
CHAKRABARTI, SANDIP K
Keywords: Black hole physics
accretion
convergent–divergent flow
de Laval nozzle
Issue Date: 2010
Publisher: Int. J. Mod. Phys. D.
Citation: K. Chakrabarti, M. M. Majumdar and S. K. Chakrabarti, Accretion problem in a Kerr Black Hole Geometry Viewed as Flows in Converging-Diverging Ducts, Int. J. Mod. Phys. D., 2010, 19, 2059
Abstract: Accretion flow on a horizon is supersonic, no matter what the flow angular momentum or the spin of the black hole is. This means that a black hole accretion can always be viewed as a flow in a flat space–time through one or more convergent–divergent ducts. In this paper, we study how the area of cross-sections must vary in order that the flow has the same properties in both systems. We show that the accretion flow experiencing a shock is equivalent to having two ducts connected back-to-back, both with a neck where the flow becomes supersonic. We study the pressure and Mach number variations for corotating, contrarotating flows and flows around a black hole with evolving spin.
URI: http://hdl.handle.net/123456789/238
Appears in Collections:2010

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