The Experts below are selected from a list of 99 Experts worldwide ranked by ideXlab platform

J.d. Huba - One of the best experts on this subject based on the ideXlab platform.

  • finite larmor radius magnetohydrodynamics of the rayleigh taylor instability
    Physics of Plasmas, 1996
    Co-Authors: J.d. Huba
    Abstract:

    The evolution of the Rayleigh–Taylor instability is studied using finite Larmor radius (FLR) magnetohydrodynamic (MHD) theory. Finite Larmor radius effects are introduced in the momentum Equation through an anisotropic ion stress tensor. Roberts and Taylor [Phys. Rev. Lett. 3, 197 (1962)], using fluid theory, demonstrated that FLR effects can stabilize the Rayleigh–Taylor instability in the short‐wavelength limit (kLn≫1, where k is the wave number and Ln is the density gradient scale length). In this paper a linear Mode Equation is derived that is valid for arbitrary kLn. Analytic solutions are presented in both the short‐wavelength (kLn≫1) and long‐wavelength (kLn≪1) regimes, and numerical solutions are presented for the intermediate regime (kLn∼1). The long‐wavelength Modes are shown to be the most difficult to stabilize. More important, the nonlinear evolution of the Rayleigh–Taylor instability is studied using a newly developed two‐dimensional (2‐D) FLR MHD code. The FLR effects are shown to be a stab...

S Q Wang - One of the best experts on this subject based on the ideXlab platform.

  • effects of compressibility on the finite larmor radius stabilized rayleigh taylor instability in z pinch implosions
    Physics of Plasmas, 2008
    Co-Authors: L Huang, G D Jian, X M Qiu, X D Peng, S Q Wang
    Abstract:

    The effects of compressibility on the Rayleigh–Taylor (RT) instability in a finite Larmor radius (FLR) plasma of magnetic field acceleration are studied by means of FLR magnetohydrodynamic (MHD) theory. FLR effects are introduced in the momentum Equation of MHD theory through an anisotropic ion stress tensor. The linear Mode Equation which includes main equilibrium quantities and their high-order differential terms is derived. The dispersion Equation is solved numerically. The main results indicate that in the compressible FLR plasma the growth rate of the RT instability displays faster growing and broader wavenumber range; and a new branch of low-frequency and long-wavelength instability, whose real frequency is positive (opposite from the negative real frequency of the RT instability), is found in the compressible FLR plasma. That is, plasma compressibility is a destabilizing factor for both the FLR stabilized RT instability and the new branch of instability.

L Huang - One of the best experts on this subject based on the ideXlab platform.

  • effects of compressibility on the finite larmor radius stabilized rayleigh taylor instability in z pinch implosions
    Physics of Plasmas, 2008
    Co-Authors: L Huang, G D Jian, X M Qiu, X D Peng, S Q Wang
    Abstract:

    The effects of compressibility on the Rayleigh–Taylor (RT) instability in a finite Larmor radius (FLR) plasma of magnetic field acceleration are studied by means of FLR magnetohydrodynamic (MHD) theory. FLR effects are introduced in the momentum Equation of MHD theory through an anisotropic ion stress tensor. The linear Mode Equation which includes main equilibrium quantities and their high-order differential terms is derived. The dispersion Equation is solved numerically. The main results indicate that in the compressible FLR plasma the growth rate of the RT instability displays faster growing and broader wavenumber range; and a new branch of low-frequency and long-wavelength instability, whose real frequency is positive (opposite from the negative real frequency of the RT instability), is found in the compressible FLR plasma. That is, plasma compressibility is a destabilizing factor for both the FLR stabilized RT instability and the new branch of instability.

X D Peng - One of the best experts on this subject based on the ideXlab platform.

  • effects of compressibility on the finite larmor radius stabilized rayleigh taylor instability in z pinch implosions
    Physics of Plasmas, 2008
    Co-Authors: L Huang, G D Jian, X M Qiu, X D Peng, S Q Wang
    Abstract:

    The effects of compressibility on the Rayleigh–Taylor (RT) instability in a finite Larmor radius (FLR) plasma of magnetic field acceleration are studied by means of FLR magnetohydrodynamic (MHD) theory. FLR effects are introduced in the momentum Equation of MHD theory through an anisotropic ion stress tensor. The linear Mode Equation which includes main equilibrium quantities and their high-order differential terms is derived. The dispersion Equation is solved numerically. The main results indicate that in the compressible FLR plasma the growth rate of the RT instability displays faster growing and broader wavenumber range; and a new branch of low-frequency and long-wavelength instability, whose real frequency is positive (opposite from the negative real frequency of the RT instability), is found in the compressible FLR plasma. That is, plasma compressibility is a destabilizing factor for both the FLR stabilized RT instability and the new branch of instability.

X M Qiu - One of the best experts on this subject based on the ideXlab platform.

  • effects of compressibility on the finite larmor radius stabilized rayleigh taylor instability in z pinch implosions
    Physics of Plasmas, 2008
    Co-Authors: L Huang, G D Jian, X M Qiu, X D Peng, S Q Wang
    Abstract:

    The effects of compressibility on the Rayleigh–Taylor (RT) instability in a finite Larmor radius (FLR) plasma of magnetic field acceleration are studied by means of FLR magnetohydrodynamic (MHD) theory. FLR effects are introduced in the momentum Equation of MHD theory through an anisotropic ion stress tensor. The linear Mode Equation which includes main equilibrium quantities and their high-order differential terms is derived. The dispersion Equation is solved numerically. The main results indicate that in the compressible FLR plasma the growth rate of the RT instability displays faster growing and broader wavenumber range; and a new branch of low-frequency and long-wavelength instability, whose real frequency is positive (opposite from the negative real frequency of the RT instability), is found in the compressible FLR plasma. That is, plasma compressibility is a destabilizing factor for both the FLR stabilized RT instability and the new branch of instability.