HR: 1340h
AN: NG43A-0557    [Abstracts]
TI: Nearly incompressible MHD turbulence and large scale inhomogeneity
AU: * Hunana, P
EM: peter.hunana@email.ucr.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Riverside, CA 92521 United States
AU: Zank, G P
EM: zank@ucr.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Riverside, CA 92521 United States
AU: Shaikh, D
EM: dastgeer@ucr.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Riverside, CA 92521 United States
AB: A theory of nearly incompressible (NI) fluid including a large scale inhomogeneous background is developed and generalized to magnetohydrodynamics (MHD). The perturbative expansion technique developed previously for NI hydrodynamics and NI MHDs is used to derive the inhomogeneous NI MHD equations. The background flow comprises of a time independent inhomogeneous solar wind (SW). Depending on the value of plasma beta, which is defined as the ratio of thermal and magnetic pressure, the theory leads to three distinct cases of NI MHD (β>> 1, β~ 1, β<< 1). Each regime is discussed separately and the implications for the theory of solar wind fluctuations are emphasized. The nonadiabatic, nearly incompressible heat transfer equation is also studied and a more generalized form with inclusion of SW background is obtained.
DE: 2149 MHD waves and turbulence (2752, 6050, 7836)
DE: 2164 Solar wind plasma
DE: 4455 Nonlinear waves, shock waves, solitons (0689, 2487, 3280, 3285, 4275, 6934, 7851, DE: 4490 Turbulence (3379, 4568, 7863)
DE: 7836 MHD waves and instabilities (2149, 2752, 6050)
SC: Nonlinear Geophysics [NG]
MN: Fall Meeting 2005