{
  "abstract": "At scales much larger than the ion inertial length and ion-gyroscale, space-plasma turbulence is often described within the framework of incompressible magnetohydrodynamics (MHD). Using high-resolution direct numerical simulations with $1024^3$ grid points, we perform the first systematic numerical comparison of three exact-law formulations for the total energy cascade in homogeneous, but not necessarily isotropic, MHD turbulence: the Yaglom-Monin (YM), Banerjee-Galtier (BG), and two-point correlator formulations. Despite directional variations, the angle-averaged energy transfer rates for all three formulations show excellent agreement for zero, moderate, and strong background magnetic fields. These results clearly suggest the usefulness of alternative BG and correlator formulations for estimating the energy cascade rates in turbulent space plasmas when the required spatial derivatives are accessible through multi-spacecraft measurements. We also argue that the isotropic Politano-Pouquet (PP) formulation does not provide a true directional transfer rate and therefore its application as a single-direction energy transfer rate estimator leads to inaccurate values, especially under anisotropic conditions. Decomposing the exact formulations into RMHD and non-RMHD contributions, we also show that the RMHD cascade rates cannot be obtained merely by increasing the strength of the mean magnetic field in incompressible magnetohydrodynamic turbulence. Finally, a term-by-term analysis of different formulations reveals how different nonlinear interaction channels coexist and collaborate with each other to maintain the same energy cascade rate across the inertial scales.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.09437",
  "author_total": 2,
  "authors": [
    {
      "name": "Ramesh Sasmal"
    },
    {
      "name": "Supratik Banerjee"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9cjvfyxrqrgmd.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.09437",
  "fulltext_url": null,
  "id": "9cjvfyxrqrgmd",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.09437",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.plasm-ph"
    ],
    [
      "arxiv",
      "physics.space-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.09437",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9cjvfyxrqrgmd.ris",
  "sources": [
    {
      "first_seen": "2026-11-10T06:21:04Z",
      "native_id": "2611.09437",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.09437"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:physics.space-ph",
      "subfield": "stellar"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Different exact-law formulations to calculate the energy cascade rate in magnetohydrodynamic turbulence with and without mean magnetic fields",
  "title_text": "Different exact-law formulations to calculate the energy cascade rate in magnetohydrodynamic turbulence with and without mean magnetic fields",
  "type": "preprint",
  "updated_at": "2026-11-10T06:21:04Z",
  "url": "https://research.draconitic.com/paper/9cjvfyxrqrgmd",
  "venue": "arXiv",
  "versions": []
}