Publications Repository - Gdańsk University of Technology

The magnetoacoustic heating of plasma by harmonic or periodic saw-tooth perturbations at a trans-ducer is theoretically studied. The planar fast and slow magnetosound waves are considered. The wavevector may form an arbitrary angleθwith the equilibrium straight magnetic field. In view of variableθand plasma-β, the description of magnetosound perturbations and appropriate magnetosound heatingis fairly difficult. The scenario of heating depends not only on plasma-βandθ, but also on a balancebetween nonlinear attenuation at the shock front and inflow of energy into a system. Under some condi-tions, the average over the magnetosound period force of heating may tend to a positive or negative limit,tend to zero, or may remain constant when the distance from a transducer tends to infinity. Dynamicsof temperature specifying heating differs in thermally stable and unstable cases and occurs unusually inthe isentropically unstable flows.

Authors

• prof. dr hab. Anna Perelomova link open in new tab