NIF 相关 MagLIF gaspipe 上热力传输的非局部效应

我们 present 用于 NIF gaspipe 实验的 heat flow 模拟，以 investigate kinetic effects on transport phenomena。D2 和 neopentane (C5H12) filled targets 用于 study laser preheat stage of a MagLIF scheme，其中 sometimes applied to the target axial magnetic field。使用带 collision-dominated fluid model 和 Schurtz nonlocal electron thermal conduction model 的 radiation-MHD code HYDRA 完成 simulation。Using the Schurtz model to evolve the electron temperature increased the heat front propagation of neopentane gas targets compared to a local model by limiting radial heat flow。这会 increase electron temperature near the axis，从而 decrease laser absorption。我们 find the effect of heat flow models on temperature profiles and laser propagation is modest。Beyond the Schurtz model，我们利用 HYDRA to initialize plasma conditions for the Vlasov Fokker-Planck K2 code。We run K2 until a quasi-steady state is reached and examine the impact of kinetic effects on heat transport。虽然 axial heat flow is well predicted by fluid models，但 fluid model consistently over predicts radial heat flow，最高可达 150%，尤其在 D2 filled gaspipes 中最大 temperature gradient 的 region。相反，发现 Schurtz nonlocal electron conduction model 对于 capturing kinetic heat flow in gaspipes 足够好。