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SUMMARY:Study of viscous-convection instabilities of thin laminar accretio
 n flows
DTSTART;VALUE=DATE-TIME:20181025T151000Z
DTEND;VALUE=DATE-TIME:20181025T153000Z
DTSTAMP;VALUE=DATE-TIME:20260308T181546Z
UID:indico-contribution-1080@cern.ch
DESCRIPTION:Speakers: Konstantin Malanchev (Sternberg Astronomical Institu
 te MSU)\nDisk accretion is a very common phenomenon in the Universe: plane
 ts are born in accretion disks near young stars\, bright X-ray outbursts o
 f accretion disks occur in close star binary systems\, supermassive black 
 holes accrete matter from the surrounding disks. Observation behavior of a
 ccretion disks in different sources are described in the terms of standard
  accretion disk model (Shakura & Sunyaev 1973). The standard model of disk
  accretion assumes turbulent viscosity\, but the nature of the turbulence 
 is still under discussion. This problem doesn’t have general solution fo
 r all types of accretion disks because pure hydrodynamical Keplerian flow 
 is stable due classical Rayleigh criterion. The report describes resent re
 sults on search of small perturbations in thin laminar Keplerian accretion
  flows. New type of instabilities – viscous-convective instabilities –
  was found in laminar accretion flows taking into account the dependence m
 acroscopic coefficients of viscosity and thermal conductivity on the tempe
 rature.\n\nhttps://indico.particle.mephi.ru/event/22/contributions/1080/
LOCATION:Hotel Intourist Kolomenskoye 4* Moskvorechye 1 hall
URL:https://indico.particle.mephi.ru/event/22/contributions/1080/
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