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Solar wind flow past Venus and its implications for the occurrence of the Kelvin–Helmholtz instability

Solar wind flow past Venus and its implications for the occurrence of the Kelvin–Helmholtz instability,10.1016/j.pss.2007.01.006,Planetary and Space S

Solar wind flow past Venus and its implications for the occurrence of the Kelvin–Helmholtz instability   (Citations: 11)
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In this paper, the solar wind flow around Venus is modeled as a nondissipative fluid which obeys the ideal magnetohydrodynamic equations extended for mass loading processes. The mass loading parameter is calculated for four different cases, corresponding to solar minimum and maximum XUV flux and to nominal and low solar wind velocity. We get smooth profiles of the field and plasma parameters in the magnetosheath. Based on the results of this flow model, we investigate the occurrence of the Kelvin–Helmholtz (K–H) instability at the equatorial flanks of the ionopause of Venus. By comparing the instability growth time with the propagation time of the K–H wave, we find that the K–H instability can evolve at the ionopause for all four solar wind conditions.
Journal: Planetary and Space Science - PLANET SPACE SCI , vol. 55, no. 12, pp. 1793-1803, 2007
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    • ...[5] The fourth mechanism, as alluded to briefly above, arises because of the interaction of the solar wind as it flows over the top of the planetary ionosphere, creating a velocity shear between the two plasmas, which is very favorable for the generation of the KHI [Wolff et al., 1980], especially in the terminator region [Biernat et al., 2007; Amerstorfer et al., 2007]...

    S. N. Walkeret al. Unusual nonlinear waves in the Venusian magnetosheath

    • ...Numerous simulation studies [Thomas and Winske, 1991; Terada et al., 2002; Amerstorfer et al., 2007; Biernat et al., 2007] strongly suggest that these waves should exist...
    • ...The work presented by Biernat et al. [2007] suggests that these waves are generated under a wide variety of plasma parameters, arising at both solar maximum and minimum...
    • ...[9] Simultaneous VEX magnetic field and plasma measurements suggest that the shear profile in the plasma flow at the boundary between the ionosphere and the solar wind, can lead to the excitation of the K-H instability and the generation of ionopause surface waves, as suggested by previous theoretical studies [Wolff et al., 1980; Terada et al., 2002; Amerstorfer et al., 2007; Biernat et al., 2007]...

    S. A. Popeet al. Giant vortices lead to ion escape from Venus and re-distribution of pl...

    • ...Helmholtz instability can occur at the terminator ionopause of Venus [Terada et al., 2002], capable of producing structures over 1000 km and turbulence [Amerstorfer et al., 2007; Biernat et al., 2007]...

    Z. Vöröset al. Magnetic fluctuations and turbulence in the Venus magnetosheath and wa...

    • ...Numerical simulations indicate that the Kelvin-Helmholtz instability can occur at the terminator ionopause of Venus [Terada et al., 2002], capable of producing wave structures over 1000 km in size [Amerstorfer et al., 2007; Biernat et al., 2007]...

    Z. Vöröset al. Intermittent turbulence, noisy fluctuations, and wavy structures in th...

    • ...Helmholtz instability can occur at the terminator ionopause of Venus [Terada et al., 2002], capable of producing structures over 1000 km and turbulence [Amerstorfer et al., 2007; Biernat et al., 2007]...

    Z. Vöröset al. Magnetic fluctuations and turbulence in the Venus magnetosheath and wa...

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