In this study the equations of motion derived by von Karman (1), with Benton’s transformations (2) for the flow over a single free disk is studied for the slip flow. The slip regime for the Knudsen number (Kn) is valid in the range 0.1>Kn>0.01 (3). For Kn<0.01 the no-slip condition is present and for Kn>0.1 the Navier–Stokes equations cannot be used since the flow field cannot be assumed to be continuum. In our study, the slip and the no-slip regimes that lie in the range 0.1>Kn>0 is considered.

The subject of the rarefied gas dynamics can be conveniently defined as the study of gas flows in which the average value of the distance between two subsequent collisions of a molecule, namely the mean free path, is not negligible in comparison...

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