EGU21-12726
https://doi.org/10.5194/egusphere-egu21-12726
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Large-scale Structure and Turbulence Transport in the Young Solar Wind – Comparison of Parker Solar Probe Observations with a Global 3D Reynolds-averaged MHD Model

Rohit Chhiber1,2, Arcadi Usmanov1,2, William Matthaeus1, Melvyn Goldstein3, and Riddhi Bandyopadhyay4
Rohit Chhiber et al.
  • 1Dept of Physics & Astronomy and Bartol Research Institute, University of Delaware, Newark, USA (rohitc@udel.edu)
  • 2Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, USA
  • 3University of Maryland Baltimore County, Baltimore, USA
  • 4Department of Astrophysical Sciences, Princeton University, Princeton, USA
Simulation results from a global magnetohydrodynamic model of the solar corona and the solar wind are compared with Parker Solar Probe's (PSP) observations during its first several orbits. The fully three-dimensional model (Usmanov et al., 2018, ApJ, 865, 25) is based on Reynolds-averaged mean-flow equations coupled with turbulence transport equations. The model accounts for effects of electron heat conduction, Coulomb collisions, Reynolds stresses, and heating of protons and electrons via nonlinear turbulent cascade. Turbulence transport equations for turbulence energy, cross helicity, and correlation length are solved concurrently with the mean-flow equations. We specify boundary conditions at the coronal base using solar synoptic magnetograms and calculate plasma, magnetic field, and turbulence parameters along the PSP trajectory. We also accumulate data from all orbits considered, to obtain the trends observed as a function of heliocentric distance. Comparison of simulation results with PSP data show general agreement. Finally, we generate synthetic fluctuations constrained by the local rms turbulence amplitude given by the model, and compare properties of this synthetic turbulence with PSP observations.

How to cite: Chhiber, R., Usmanov, A., Matthaeus, W., Goldstein, M., and Bandyopadhyay, R.: Large-scale Structure and Turbulence Transport in the Young Solar Wind – Comparison of Parker Solar Probe Observations with a Global 3D Reynolds-averaged MHD Model, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-12726, https://doi.org/10.5194/egusphere-egu21-12726, 2021.

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