resistive 2fluid paper

_pages/about.md

@@ -18,4 +18,4 @@ During my PhD at KU Leuven (Belgium), I developed a wide range of interests and
 If any of these topics piqued your interest, please check out my publications.
 
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-_This website was last updated on 3 May 2024._
+_This website was last updated on 21 May 2024._

_publications/2024-05-resistive2fluid.md

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+title: "Collisional damping of wave modes in ion-electron plasmas"
+collection: publications
+permalink: /publication/2024-05-resistive2fluid
+excerpt: 'Preprint - [arXiv:2405.11565](https://arxiv.org/abs/2405.11565)'
+date: 2024-05-21
+venue: 'Journal of Plasma Physics'
+paperurl: '' # 'http://doi.org/'
+citation: 'De Vadder, J., De Jonghe, J. and Keppens, R. (2024). &quot;Collisional effects on wave modes in ion-electron plasmas.&quot; <i>J. Plasma Phys</i>. Accepted.'
+---
+
+__Abstract.__ To expand on recent work, we introduce collisional terms in the analysis of the warm ion-electron, two-fluid equations for a homogeneous plasma at rest. Consequently, the plasma is now described by six variables: the magnetisation, the ratio of masses over charges, the electron and ion sound speeds, the angle between the wave vector and the magnetic field, and a new parameter describing the electron-ion collision frequency. This additional parameter does not introduce new wave modes compared to the collisionless case, but does result in complex mode frequencies. Both for the backward and forward propagating modes the imaginary components are negative and thus quantify collisional damping. We provide convenient (polynomial) expressions to quantify frequencies and damping rates in all short and long wavelength limits, including the cut-off and resonance limits, whilst the one-fluid magnetohydrodynamic limit is retained with the familiar undamped slow, Alfvén and fast (SAF) waves. As collisions only introduce a damping, the previously introduced labelling of the wave modes S, A, F, M, O and X can be kept and assigned based on their long and short wavelength behaviour. The obtained damping at cut-off and resonance limits is parametrised with the collision frequency, and can be tailored to match known kinetic damping expressions. It is demonstrated that varying the angle can introduce crossings between the wave modes, as was already present in the ideal ion-electron case, but also a collision frequency exceeding a critical collision frequency can lead to crossings at angles where previously only avoided crossings were found.
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+Preprint - [arXiv:2405.11565](https://arxiv.org/abs/2405.11565)