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Colliding wind binaries (CWBs) are unique laboratories for X-rayastrophysics. The massive stars in these systems possess powerful stellar windswith speeds up to $\sim$3000 km s$^{-1}$, and their collision leads to hotplasma (up to $\sim10^8$K) that emit thermal X-rays (up to $\sim$10 keV). ManyX-ray telescopes have observed CWBs, including Suzaku, and our work aims tomodel these X-ray observations. We use 3D smoothed particle hydrodynamics (SPH)to model the wind-wind interaction, and then perform 3D radiative transfer tocompute the emergent X-ray flux, which is folded through X-ray telescopes'response functions to compare directly with observations. In these proceedings,we present our models of Suzaku observations of the multi-year-period, highlyeccentric systems $\eta$ Carinae and WR 140. The models reproduce theobservations well away from periastron passage, but only $\eta$ Carinae's X-rayspectrum is reproduced at periastron; the WR 140 model produces too much fluxduring this more complicated phase.

3D Hydrodynamic & Radiative Transfer Models of X-ray Emission from Colliding Wind Binaries