| Name: | Ankit Kumar |
| Affiliation: | National Institute of Technology Delhi |
| Conference ID : | ASI2024_780 |
| Title : | The Effect of Viscosity on the Periodic Ratio for Sausage and Kink Mode Waves in a Magnetic Slab Model with Siphon Flow |
| Authors : | Ankit Kumar1, V.S. Pandey1, Preeti Verma2 |
| Authors Affiliation: | 1Ankit Kumar, V.S. Pandey Affiliation (Department of Applied Sciences, National Institute of Technology Delhi, India – 110036)
2 Preeti Verma Affiliation (Department of ECE, National Institute of Technology Delhi, India – 110036) |
| Mode of Presentation: | Poster |
| Abstract Category : | Sun, Solar System, Exoplanets, and Astrobiology |
| Abstract : | Analytical models of magnetic structures in the Sun's atmosphere are indispensable tools for deepening our understanding of the behavior of magnetohydrodynamic (MHD) waves associated with it. These models are instrumental in advancing the field of solar magneto-seismology, a discipline dedicated to the study of the interactions between MHD waves and magnetic fields of the Sun. A substantial body of literature especially for the case of fast magnetoacoustics waves have been dedicated to elucidating various aspects of MHD wave characteristics, accounting for both uniform and structured plasma conditions with considering ideal or non-ideal scenarios, which encompass factors like viscosity which is comparatively more effective for the case of fast magnetoacoustics wave rather than other dissipative terms like electrical resistivity, thermal conductivity, and radiation effects. In this context, an analytical approach has been employed to deduce the dispersion relation, specifically focusing on the influence of viscosity within rectangularly structured plasma subjected to siphon flow aligned with the magnetic field which is still remained to be addressed. Here, the density within the structure remains uniform and maintains a constant magnitude in contrast to the surrounding regions, denoted as ρ_i/ρ_e = constant. This study would provide insights into how the field-aligned flow along with viscosity may change the characteristics of fast MHD guided waves, e.g., phase velocity, damping time and the periodic ratio of the fundamental mode to twice the value of its first overtone for standing sausage and kink mode waves w.r.t to the static case. These periodic ratio values play an important role in the application of solar magneto seismology. |
