In Section 2, the authors adopt a Landau-based heat flux closure (Eq. 5) for the ten-moment fluid model, relying on a free parameter χ/ks,0 to approximate kinetic effects. However, the paper provides neither a theoretical justification for the selection of this parameter nor any numerical validation against full kinetic benchmarks to support its adequacy. Since this closure directly governs energy transport and dissipation in weakly collisional regimes, especially relevant near reconnection sites with strong anisotropies and nonlocal transport, how can the authors ensure that their choice preserves physical consistency across different coupling regimes? Given the known limitations of local gradient-based closures in strongly kinetic environments, a clarification on the applicability and robustness of Eq. 5 in the presented multiphysics context is necessary.
