2021/06/10 by С. А. Белов, S. Belov, S. Vasheghani Farahani +8
Physics and Astronomy · #FOS: Physical sciences #Ionosphere and magnetosphere dynamics #Magnetic confinement fusion research #Plasma Physics (physics.plasm-ph) #Solar and Space Plasma Dynamics #Solar and Stellar Astrophysics (astro-ph.SR) #Space Physics (physics.space-ph) #astro-ph.SR #physics.plasm-ph #physics.space-ph
paper · pdf · doi:10.48550/arxiv.2106.05712
arxiv created 2021/06/10 · openalex publication_date 2021/06/10 · arxiv updated 2021/06/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Compressional plasma perturbations may cause thermal misbalance between plasma heating and cooling processes. This misbalance significantly affects the dispersion properties of compressional waves providing a feedback between the perturbations and plasmas. It has been shown that Alfvén waves may induce longitudinal (compressional) plasma motions. In the present study, we analyze the effects of thermal misbalance caused by longitudinal plasma motions induced by shear Alfvén waves. We show that thermal misbalance leads to appearance of exponential bulk flows, which itself modifies the Alfvén induced plasma motions. In the case of sinusoidal Alfvén waves, we show how the amplitude and phase shift of induced longitudinal motions gain dependence on the Alfvén wave frequency while shedding light on its functionality. This feature has been investigated analytically in application to coronal conditions. We also consider the evolution of longitudinal plasma motions induced by the shear sinusoidal Alfvén wave by numerical methods before comparing the results obtained with our presented analytical predictions to justify the model under consideration in the present study.