An exploration of dust grain growth within WCd systems using an advected
  scalar dust model
  Dust production is one of the more curious phenomena observed in massive
binary systems with interacting winds. The high temperatures, UV photon flux
and violent shocks should destroy any dust grains that condense. However, in
some extreme cases dust production yields of approximately 30% of the total
mass loss rate of the stellar winds have been observed. In order to better
understand this phenomenon a parameter space exploration was performed using a
series of numerical models of dust producing carbon phase Wolf-Rayet (WCd)
systems. These models incorporated a passive scalar dust model simulating dust
growth, destruction and radiative cooling. We find that reasonable dust yields
were produced by these simulations. Significant changes in the dust yield were
caused by changing the mass loss rates of the stars, with a greater mass loss
rate contributing to increased dust yields. Similarly, a close orbit between
the stars also resulted in higher dust yields. Finally, a high velocity wind
shear, which induces Kelvin-Helmholtz (KH) instabilities and wind mixing,
drastically increases the dust yields.
