Adiabatic indices in a convecting anisotropic plasma

Adiabatic indices for a non-dissipative anisotropic convecting plasma are a nalyzed, and general expressions for the effective adiabatic index and the partial adiabatic indices parallel (gamma(parallel to)) and perpendicular ( gamma(perpendicular to)) to the magnetic field are obtained. It is shown th at, in the general case, the value of the effective adiabatic index is not a universal constant and depends on the plasma temperature anisotropy and o n the properties of the plasma motion. The values of gamma(perpendicular to ) and gamma(parallel to) are shown to be independent of the plasma paramete rs being completely determined by the characteristics of the plasma flow.