Planetesimal precursors in turbulent
protoplanetary disks
In this project we will use direct numerical simulations of
turbulence to study the effect on planetesimal precursors
(~ 1cm - 10m). The goal is twofold: In one part we will
measure turbulent relative velocities in high resolution
local simulations, and in the other part we will determine
the global distribution of solids in the "weather-pattern"
of turbulent protoplanetary disks. Thus, we can determine
the key parameters for the influence of turbulence on
planetesimal formation from direct numerical simulations.
The distribution of planetesimal precursors in the
protoplanetary disk will be derived through global 3D-MHD
simulations. We will also determine the degree to which the
precursors can be concentrated locally in protoplanetary
disks in particular in flow features such as spiral arms,
high pressure regions or vortex structures. In addition we
will derive collision speeds and probabilities as generated
by the turbulence as a function of the particle size of the
collision partners and of the location in the disk. The
obtained data are an essential input for projects B1, B2,
B3 and C2, and will also be used for project D2.
Principle Investigators
Dr. Hubertus Klahr
Prof. Dr. Wilhelm Kley
