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Nonlocal Electron Heat Conduction for Radiation Hydrodynamics Code
Wenqiang YUAN, Zhonghai ZHAO, Bin QIAO
Chinese Journal of Computational Physics    2023, 40 (2): 232-240.   DOI: 10.19596/j.cnki.1001-246x.8616
Abstract54)   HTML11)    PDF (6195KB)(983)      

Accurate electron heat conduction model is essential for understanding energy transport and dissipation during inertial confinement fusion and celestial burst process, and guiding the design of fusion capsule and experiment design of laboratory astrophysics. We successfully couple the non-local electron heat conduction model to the radiation hydrodynamics code, the simulation results of which in two analytical tests are basically consistent with the results calculated by the Fokker-Planck code. Applying the coupled code to the interaction between nanosecond laser and solid targets, we find that the non-local effect is mainly manifest in the time-dependent flux limited effect of the coronal critical surface in the early stage and the gradually enhanced preheating effect of the ablation surface in the late stage. These results are of great significance to clearly understand the laser energy deposition and transmission, and the generation and development of hydrodynamic instability in inertial confinement fusion, especially in direct drive.

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