Fig. 3.30 A DSMC calculation for a spherical isotropically emitting nucleus with a water production rate of 2 kg/s and an initial gas temperature of 200 K. Top left: The number density in a 2D slice
through the centre of the 2 km radius nucleus. Top right: The number density along a radial profile
from the surface. Bottom right: The bulk speed of the molecules along the same profile. Bottom left:
The gas temperature along the profile
Fig. 3.31 The gas speed from a 2 km isotropically emitting sphere with different water production
rates. The final gas speed is a function of the production rate but not a strong one. (Courtesy of
Raphael Marschall)
3.4 Gas Expansion
235
through the centre of the 2 km radius nucleus. Top right: The number density along a radial profile
from the surface. Bottom right: The bulk speed of the molecules along the same profile. Bottom left:
The gas temperature along the profile
Fig. 3.31 The gas speed from a 2 km isotropically emitting sphere with different water production
rates. The final gas speed is a function of the production rate but not a strong one. (Courtesy of
Raphael Marschall)
3.4 Gas Expansion
235