Modeling Heat Conduction and Radiation Transport with the Diffusion Equation in NIF ALE-AMR

Conference · Tue Oct 06 00:00:00 EDT 2009

DOI:https://doi.org/10.1088/1742-6596/244/2/022075· OSTI ID:967751

Fisher, A C; Bailey, D S; Kaiser, T B; Gunney, B N; Masters, N D; Koniges, A E; Eder, D C; Anderson, R W

The ALE-AMR code developed for NIF is a multi-material hydro-code that models target assembly fragmentation in the aftermath of a shot. The combination of ALE (Arbitrary Lagrangian Eulerian) hydro with AMR (Adaptive Mesh Refinement) allows the code to model a wide range of physical conditions and spatial scales. The large range of temperatures encountered in the NIF target chamber can lead to significant fluxes of energy due to thermal conduction and radiative transport. These physical effects can be modeled approximately with the aid of the diffusion equation. We present a novel method for the solution of the diffusion equation on a composite mesh in order to capture these physical effects.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 967751
• Report Number(s): LLNL-CONF-418141; TRN: US200924%%116
• Resource Relation: Journal Volume: 244; Journal Issue: 2; Conference: Presented at: Inertial Fusion Sciences and Applications (IFSA), San Francisco, CA, United States, Sep 06 - Sep 11, 2009
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
DIFFUSION EQUATIONS
FRAGMENTATION
LAGRANGIAN FUNCTION
RADIATION TRANSPORT
SIMULATION
TARGET CHAMBERS
TARGETS
THERMAL CONDUCTION
TRANSPORT