Statistical Survey of Collisionless Dissipation in the Terrestrial Magnetosheath

Wang, Yanwen; Bandyopadhyay, R.; Chhiber, R.; Matthaeus, W. H.; Chasapis, A.; Yang, Yan; Wilder, F. D.; Gershman, D. J.; Giles, B. L.; Pollock, C. J.; Dorelli, J.; Russell, C. T.; Strangeway, R. J.; Torbert, Roy; Moore, T. E.; Burch, J. L.

doi:10.1029/2020ja029000

Cited by 16 publications

(14 citation statements)

References 66 publications

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“…Secondly, − (P α • ∇)•u α includes both compressive and incompressive contributions, while most of other estimates are limited to incompressive contributions. The kinetic simulations used here are weakly compressive, and more samples with stronger compression are required to assess detailed contributions from the compressive part of − (P α • ∇) • u α to the energy dissipation (Chasapis et al 2018b;Du et al 2018;Pezzi et al 2020;Wang et al 2021;Zhou et al 2021;Bandyopadhyay et al 2021). Thirdly, − (P α • ∇) • u α remains applicable to anistropic cases, in which we can figure out the preferential dissipation direction (Song et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Pressure-Strain Interaction as the Energy Dissipation Estimate in Collisionless Plasma

Yang,

Matthaeus,

Roy

et al. 2022

Preprint

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The dissipative mechanism in weakly collisional plasma is a topic that pervades decades of studies without a consensus solution. We compare several energy dissipation estimates based on energy transfer processes in plasma turbulence and provide justification for the pressure-strain interaction as a direct estimate of the energy dissipation rate. The global and scale-by-scale energy balances are examined in 2.5D and 3D kinetic simulations. We show that the global internal energy increase and the temperature enhancement of each species are directly tracked by the pressure-strain interaction. The incompressive part of the pressure-strain interaction dominates over its compressive part in all simulations considered. The scale-by-scale energy balance is quantified by scale filtered Vlasov-Maxwell equations, a kinetic plasma approach, and the lag dependent von Kármán-Howarth equation, an approach based on fluid models. We find that the energy balance is exactly satisfied across all scales, but the lack of a well-defined inertial range influences the distribution of the energy budget among different terms in the inertial range. Therefore, the widespread use of the Yaglom relation to estimating dissipation rate is questionable in some cases, especially when the scale separation in the system is not clearly defined. In contrast, the pressure-strain interaction balances exactly the dissipation rate at kinetic scales regardless of the scale separation.

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Section: Discussionmentioning

confidence: 99%

Pressure-Strain Interaction as the Energy Dissipation Estimate in Collisionless Plasma

Yang,

Matthaeus,

Roy

et al. 2022

Preprint

Self Cite

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“…First, P u ( • ) • á- ñ a a is readily resolved into contributions of electrons and ions (and additional species if present). Therefore this approach is useful to understand the distribution of dissipated energy between different species (Sitnov et al 2018;Bandyopadhyay et al 2021) (Chasapis et al 2018b;Du et al 2018;Pezzi et al 2021;Bandyopadhyay et al 2021;Wang et al 2021;Zhou et al 2021). Third, P u ( • ) • á- ñ a a remains applicable to anistropic cases, in which one may identify a preferred direction that influences the nature of dissipation (Song et al 2020;Bacchini et al 2022).…”

Section: • ( • )•mentioning

confidence: 99%

Pressure–Strain Interaction as the Energy Dissipation Estimate in Collisionless Plasma

Yang

Matthaeus

Roy

et al. 2022

ApJ

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The dissipative mechanism in weakly collisional plasma is a topic that pervades decades of studies without a consensus solution. We compare several energy dissipation estimates based on energy transfer processes in plasma turbulence and provide justification for the pressure–strain interaction as a direct estimate of the energy dissipation rate. The global and scale-by-scale energy balances are examined in 2.5D and 3D kinetic simulations. We show that the global internal energy increase and the temperature enhancement of each species are directly tracked by the pressure–strain interaction. The incompressive part of the pressure–strain interaction dominates over its compressive part in all simulations considered. The scale-by-scale energy balance is quantified by scale filtered Vlasov–Maxwell equations, a kinetic plasma approach, and the lag dependent von Kármán–Howarth equation, an approach based on fluid models. We find that the energy balance is exactly satisfied across all scales, but the lack of a well-defined inertial range influences the distribution of the energy budget among different terms in the inertial range. Therefore, the widespread use of the Yaglom relation in estimating the dissipation rate is questionable in some cases, especially when the scale separation in the system is not clearly defined. In contrast, the pressure–strain interaction balances exactly the dissipation rate at kinetic scales regardless of the scale separation.

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“…As a natural plasma laboratory, the magnetosheath offers researchers a large set of in situ measurement data made by spacecraft to study the mechanism of collisionless plasma (Rakhmanova et al 2021). Problems of the magnetic reconnection (Burch et al 2016;Phan et al 2018), structures in the terms of the Vlasov equation (Shuster et al 2021), and the Kolmogorov spectrum (Huang et al 2017), as well as plasma turbulence cascade (Bandyopadhyay et al 2018) and the collisionless dissipation (Bandyopadhyay et al 2020a(Bandyopadhyay et al , 2020bWang et al 2021) are well addressed by analyzing magnetosheath observations. To explore the electronscale kinetic physics in the region around the reconnection site, NASA has conducted the ongoing Magnetospheric Multiscale (MMS) mission (Burch et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Curvature of Magnetic Field and Its Role on Plasma in Turbulent Magnetosheath

Shen

Ren

et al. 2022

ApJ

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This study presents statistical features of magnetic field curvature in the magnetosheath region. Two sets of high-quality field and plasma data measured by the Magnetospheric Multiscale mission are analyzed by the multiple-point analysis method. The results include the following: (a) The probability distribution function (PDF) of the curvature exhibits two different power laws consistent with previous studies; the PDF of small curvatures depends on the plasma condition and the PDF of large curvatures shows better agreement. (b) The data validate the derived relation between the current density and the guiding center current as well as the diamagnetic current. (c) The acceleration due to curvature drifts in the perpendicular direction occurs when κ/κ rms is larger than 1, which is a potential mechanism for anisotropic distribution of plasma pressure at large curvatures.

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Statistical Survey of Collisionless Dissipation in the Terrestrial Magnetosheath

Cited by 16 publications

References 66 publications

Pressure-Strain Interaction as the Energy Dissipation Estimate in Collisionless Plasma

Pressure-Strain Interaction as the Energy Dissipation Estimate in Collisionless Plasma

Pressure–Strain Interaction as the Energy Dissipation Estimate in Collisionless Plasma

Curvature of Magnetic Field and Its Role on Plasma in Turbulent Magnetosheath

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