A shock tube's driver gas can apparently provide flow with turbulent bursts. The fluctuations are interpreted using a boundary layer model of contact surface flow and results from a kinetic theory of turbulence. With this, a lower limit of 4 on the ratio of maximum to minimum turbulent intensities in contact surface instabilities has been estimated.

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Using an arc-driven shock tube, the turbulent features in the ion density fluctuations of an argon plasma behind collisional ionising shock fronts are determined. Fluctuation power spectra show many discrete modes and follow S(Kz) alpha Kz-n with 1.2