Triple-Point Singularity and the Neumann Paradox of Mach Reflection
The singular nature of the flow near the triple point is investigated analytically based on a solution of the steady 2D Navier–Stokes equations system in polar coordinates, with special attention on the cause of the Neumann paradox. It gives a centered fan-like flow from the triple point in widening the slip flow region. Angles and curvatures of the reflected (R) and Mach stem (m) shock lines given in the solution are consistent with existing experiment data.
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