RT Journal Article ID 38a815a439f90736 A1 Selezov, Igor T. T1 On Some Transformations and Approximations of Magnetohydrodynamic Equations JF International Journal of Fluid Mechanics Research JO FMR YR 2010 FD 2010-11-16 VO 37 IS 4 SP 382 OP 389 AB Investigations related to some hidden symmetry properties of the system of differential equations of magnetohydrodynamics (MHD) are presented. The MHD-equations of a finite electrical conductivity characterized by the magnetic Reynolds number Rem are considered. Each model under consideration is characterized some hidden geometric and physical symmetry. As a result, it makes it possible to simplify the original model: decomposition, introduction of potentials or new variables, self-similarity et al. The MHD-system for magneto-isotropic compressible fluid under the action of a magnetic field is considered and nondi-mensionalized. It is shown that in the case of one-dimensional nonlinear motion the original system can be reduced to some simplified form. In the case of linearized equations the self-similarity analysis is applied allowing to obtain the system in which the value Rem is not involved explicitly. Approximations of a weak and high Rem are developed leading to hierarchy systems. The introduction of potentials leading to some cases of solvability is presented. PB Begell House LK https://www.dl.begellhouse.com/journals/71cb29ca5b40f8f8,4180fc0b370754d8,38a815a439f90736.html