Because of the recent interest in the fluid-mechanic description of hypersonic wakes, laminar mixing problems are again being investigated both experimentally and theoretically. This paper shows that the velocity along the dividing streamline can be determined in a simple manner by approximating the integral solution contained in NACA Report 958, "Laminar Mixing of a Compressible Fluid," by D. R. Chapman. The effect of finite base radius (or Reynolds number) is also investigated using this approximate solution. 7 pp.
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