Growth of Settling Dust Particles in Turbulent Disks

Details Growth of Settling Dust Particles in Turbulent Disks Growth of Settling Dust Particles in Turbulent Disks

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1158..163t&link_type=abstract

EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY: Proceedings of the International Conference. AIP Conference Proceedings, V

Computer Science

Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus, Radiative Transfer, Scattering, Accretion And Accretion Disks

Scientific paper

Dust sedimentation and dust layer formation at the disk midplane are discussed through the numerical calculation of grain growth in a turbulent disk. The calculation is 1D in the vertical direction and the size and spatial distribution of dust grains during sedimentation is calculated. The grains settle to the midplane and form a dust layer. Dust layer formation is complete when the dust in the upper atmosphere depletes. In order for dust grains to grow beyond the critical size (~1 m), at the size grains move fastest without falling to the star, turbulence must be weak enough (α<10-7) or the dust-to-gas ratio should be larger than 10-1.

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