Henny J.G.L.M. Lamers, and Arved Sapar, eds. Outer Wind Evolution of Instability-Generated Clumped Structure in Hot-Star Winds

The line-driven instability of hot-star winds is understood to lead to extensive clumped structure in the near-star acceleration portion of the wind. In this paper, we summarize our recent e orts to simulate the evolution of this structure far from the stellar surface. We rst present direct simulations of structure to about r =40R, and then model the further hydrodynamical evolution to 160 R through a quasi-periodic approach. Finally we outline a novel, pseudo-planar method designed to simulate the evolution of such structure to very large radial distances of 1000R or more. 1