3D Adaptive Mesh Refinement Simulations of Pellet Injection in Tokamaks

[摘要] We present results of Adaptive Mesh Refinement (AMR) simulations of the pellet injection process, a proven method of refueling tokamaks. AMR is a computationally efficient way to provide the resolution required to simulate realistic pellet sizes relative to device dimensions. The mathematical model comprises of single-fluid MHD equations with source terms in the continuity equation along with a pellet ablation rate model. The numerical method developed is an explicit unsplit upwinding treatment of the 8-wave formulation, coupled with a MAC projection method to enforce the solenoidal property of the magnetic field. The Chombo framework is used for AMR. The role of the E x B drift in mass redistribution during inside and outside pellet injections is emphasized.

[发布日期] 2003-10-20 [发布机构] Princeton University. Plasma Physics Laboratory.

[关键词] Dimensions;Magnetic Fields;Injection, Pellets;70 Plasma Physics And Fusion Technology;Ablation