3D Adaptive Mesh Refinement Simulations of Pellet Injection in Tokamaks

Samtaney, R. ; Jardin, S.C. ; Colella, P. ; Martin, D.F.

Princeton University. Plasma Physics Laboratory.

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

DOI  :  10.2172/820114
RP-ID  :  PPPL-3891
RP-ID  :  AC02-76CH03073
RP-ID  :  820114

美国|英语

来源: UNT Digital Library

【 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.