Yazar "Hoshoudy, G. A." seçeneğine göre listele

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    Öğe
    A viscous magnetohydrodynamic Kelvin-Helmholtz instability in the interface of two fluid layer: Part II. An application to the atmosphere of the Sun
    (Springer, 2019) Cavus, Huseyin; Hoshoudy, G. A.
    The main aim of this submission is to investigate the effects of some parameters like wave number, shear velocity, magnetic field and temperature for the growth rate of the magnetized Kelvin-Helmholtz instability (KHI) with incessant profiles through interface of two viscous fluid layers occurred in the solar atmosphere using the model of Hoshoudy et al. (Astrophys. Space Sci. 364:89, 2019). In this examination, the presence of KHI is identified for the various cases of wave number, magnetic field, shear velocity and temperature in the solar atmosphere. The sensible values of these parameters were acquired.
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    Öğe
    A viscous magnetohydrodynamic Kelvin-Helmholtz instability in the interface of two fluid layers: Part I. Basic mechanism
    (Springer, 2019) Hoshoudy, G. A.; Cavus, Huseyin; Mahdy, A.
    This study investigates the combined effect of density, velocity and magnetic field gradients on the Kelvin-Helmholtz instability of two viscous fluid layers. For the linear phase of instability that refers to the early stage of development of Kelvin-Helmholtz instability, the linear growth rate and frequency are presented. With respect to our selected variables and the Atwood number, the behaviour of growth rate and frequency are analysed. It is found that, the behaviour of frequency is not affected by the magnetic field and viscous term. The velocity gradient with the small Atwood numbers tends to stabilize KHI flows, while the velocity gradient with the large Atwood numbers has destabilizing effect on KHI. The growth rate reduces with the constant magnetic field and viscous term, while it enhances with magnetic field gradient.
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    Öğe
    Kelvin-Helmholtz instability of two finite-thickness fluid layers with continuous density and velocity profiles
    (Indian Acad Sciences, 2018) Hoshoudy, G. A.; Cavus, Huseyin
    The effect of density and velocity gradients on the Kelvin-Helmholtz instability (KHI) of two superimposed finite-thickness fluid layers are analytically investigated. The linear normalized frequency and normalized growth rate are presented. Then, their behavior as a function of the density ratio of the light fluid to the heavy one (r) was analyzed and compared to the case of two semi-infinite fluid layers. The results showed that the values of normalized frequency of KHI for two finite-thickness fluid layers are less than their counterparts for two semi-infinite fluid layers. The behavior of normalized growth rate as a function of the velocity and density gradients capitulates to the effect of velocity gradient at the large values of (r).