A Statistical Study of the Compressible Energy Cascade Rate in Solar Wind Turbulence: Parker Solar Probe Observations
arXiv:2207.06935 · doi:10.1063/5.0109379
Abstract
We investigated incompressible and compressible magnetohydrodynamic (MHD) energy cascade rates in the solar wind at different heliocentric distances. We used in situ magnetic field and plasma observations provided by the Parker Solar Probe (PSP) mission and exact relations in fully developed turbulence. To estimate the compressible cascade rate, we applied two recent exact relations for compressible isothermal and polytropic MHD turbulence, respectively. Our observational results show a clear increase of the absolute value of the compressible and incompressible cascade rates as we get closer to the Sun. Moreover, we obtained an increase in both isothermal and polytropic cascade rates with respect to the incompressible case as compressibility increases in the plasma. Further discussion about the relation between the compressibility and the heliocentric distance is carried out. Furthermore, we compared both exact relations as compressibility increases in the solar wind and although we note a slightly trend to observe larger cascades using a polytropic closure, we obtained essentially the same cascade rate in the range of compressibility observed. Finally, we investigated the signed incompressible and compressible energy cascade rates and its connection with the real cascade rate.
arXiv comment23 pages. arXiv admin note: text overlap with arXiv:2102.11781
References in corpus (39)
- Observation of inertial energy cascade in interplanetary space plasma
- Solar Wind Turbulence and the Role of Ion Instabilities
- The Evolution and Role of Solar Wind Turbulence in the Inner Heliosphere
- Recent progress in astrophysical plasma turbulence from solar wind observations
- Switchbacks in the near-Sun magnetic field: long memory and impact on the turbulence cascade
- The Solar Probe Cup on Parker Solar Probe
- Exact relation for correlation functions in compressible isothermal turbulence
- The slow-mode nature of compressible wave power in solar wind turbulence
- Finite dissipation and intermittency in magnetohydrodynamics
- Exact Relation with Two-point Correlation Functions and Phenomenological Approach for Compressible Magnetohydrodynamic Turbulence
- Scaling Laws of Turbulence and Heating of Fast SolarWind: The Role of Density Fluctuations
- Compressible magnetohydrodynamic turbulence in the Earth's magnetosheath: estimation of the energy cascade rate using in situ spacecraft data
- Energy Cascade Rate In Compressible Fast And Slow Solar Wind Turbulence
- Enhanced Energy Transfer Rate in Solar Wind Turbulence Observed near the Sun from Parker Solar Probe
- Energy cascade and scaling in supersonic isothermal turbulence
- Energy cascade rate measured in a collisionless space plasma with MMS data and compressible Hall magnetohydrodynamic turbulence theory
- Scaling of compressible magnetohydrodynamic turbulence in the fast solar wind
- Turbulence Transport Modeling and First Orbit Parker Solar Probe (PSP) Observations
- Magnetic turbulence spectra and intermittency in the heliosheath and in the local interstellar medium
- Solar Wind Turbulence Studies using MMS Fast Plasma Investigation Data
- Incompressive Energy Transfer in the Earth's Magnetosheath: Magnetospheric Multiscale Observations
- Dynamic Alignment and Exact Scaling Laws in MHD Turbulence
- Exact law for homogeneous compressible Hall magnetohydrodynamics turbulence
- Analysis of cancellation in two-dimensional magnetohydrodynamic turbulence
- Kinetic Scale Slow Solar Wind Turbulence in the Inner Heliosphere: Co-existence of Kinetic Alfvén Waves and Alfvén Ion Cyclotron Waves
- Imprints of expansion onto the local anisotropy of solar wind turbulence
- A Kolmogorov-Like Exact Relation for Compressible Polytropic Turbulence
- Alternative derivation of exact law for compressible and isothermal magnetohydrodynamics turbulence
- Turbulence characteristics of switchbacks and non-switchbacks intervals observed by \emph{Parker Solar Probe}
- Strategies for determining the cascade rate in MHD turbulence: isotropy, anisotropy, and spacecraft sampling
- Energy transfer in compressible magnetohydrodynamic turbulence for isothermal self-gravitating fluids
- The evolution of compressible solar wind turbulence in the inner heliosphere: PSP, THEMIS and MAVEN observations
- Compressible turbulence in the interstellar medium: New insights from a high-resolution supersonic turbulence simulation
- Solar Wind Turbulence Around Mars: Relation Between The Energy Cascade Rate And The Proton Cyclotron Waves Activity
- The incompressible energy cascade rate in anisotropic solar wind turbulence
- General exact law of compressible isentropic magnetohydrodynamic flows: theory and spacecraft observations in the solar wind
- Scale-to-scale energy transfer rate in compressible two-fluid plasma turbulence
- Exact law for compressible pressure-anisotropic magnetohydrodynamic turbulence: toward linking energy cascade and instabilities
- Statistics of incompressible hydrodynamic turbulence: an alternative approach