Interface Reconstruction in Two-and Three-Dimensional Arbitrary Lagrangian-Euderian Adaptive Mesh Refinement Simulations.

Masters, N. D. ; Anderson, R. W. ; Elliott, N. S. ; Fisher, A. C. ; Gunney, B. T.

Technical Information Center Oak Ridge Tennessee

关键词: Adaptive mesh refinement;    Inertial confinement fusion;    Lasers;    Modeling;    Lagrangian functions;   

RP-ID  :  DE2007917877

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Modeling of high power laser and ignition facilities requires new techniques because of the higher energies and higher operational costs. We report on the development and application of a new interface reconstruction algorithm for chamber modeling code that combines ALE (Arbitrary Lagrangian Eulerian) techniques with AMR (Adaptive Mesh Refinement). The code is used for the simulation of complex target elements in the National Ignition Facility (NIF) and other similar facilities. The interface reconstruction scheme is required to adequately describe the debris/shrapnel (including fragments or droplets) resultingect optics or diagnostic sensors. Traditional ICF modeling codes that choose to implement ALE + AMR techniques will also benefit from this new scheme. The ALE formulation requires material interfaces (including those of generated particles or droplets) to be tracked. We present the interface reconstruction scheme developed for NIF's ALE-AMR and discuss how it is affected by adaptive mesh refinement and the ALE mesh. Results of the code are shown for NIF and OMEGA target configurations.