Modeled dust density around comet 67P/Churyumov Gerasimenko together with dust bulk flow streamlines. The total gas production rate is 2.05·1027 1/s and a dust production of 6 kg/s distributed with a r‐4 law from 10-7 to 10‐2 m. The angular dependence of the gas and dust production is distributed according to Tenishev et al. [Astrophys. J., 685, 659-‐677, (2008)] and is predominantly sunward (left) directed.
The block based type mesh that is currently under development and planned to be used in our dust/gas coma simulations.
The nucleus mesh (above) [Lamy, Space Science Reviews, 128, 23–66, (2007)] includes all major topological features and local distribution of sources over its surface.
The volume mesh (above) will be used in the actual simulations. The major advantage of such meshes is that they are adjustable to the local features of the flow with a minimal increase in the number of computational cells.
A simplified geometry of the spacecraft that can be used in our DSMC model. The model includes the main body of the spacecraft, lander, antenna and the solar panels. Shown is the inner boundary which is the spacecraft itself in black and two semi-transparent cuts through the actual simulation mesh in blue (y=0 and z=0 planes).
Simulated helium distribution around the Rosetta spacecraft during the helium pressurization test.