Prediction of temperature profiles in helical plasmas by integrated code coupled with gyrokinetic transport models
Prediction of temperature profiles in helical plasmas by integrated code coupled with gyrokinetic transport models
复制标题
通过集成代码结合回旋输运模型预测螺旋等离子体中的温度分布
DOI：
10.1088/1361-6587/ac77b8
复制
发表时间：
2022
影响因子：
2.2
通讯作者：
M. Nunami and H. Sugama
中科院分区：
文献类型：
--
作者：
S. Toda;M. Nunami and H. Sugama
通过集成代码使用简化的传输模型（户田S等人，2019年，物理等离子体26 012510）在湍流热传输的动力学电子条件下进行传输模拟，包括螺旋等离子体中带状流的影响。一个简化的模型，可以制定的热扩散率仅使用的线性属性，或可以通过考虑准线性通量的表达式来构建。这些简化的模型再现了离子温度梯度模式湍流的线性增长率和带状流衰减时间的非线性陀螺动力学模拟结果。当湍流热输运在集成模拟的演变中的每个时间步由简化模型评估时，可以获得温度廓线。计算成本使用减少的模型，其中线性gyrokinetic模拟在每个时间步进行的综合模拟是约两个数量级低于使用非线性gyrokinetic模拟。通过模拟预测稳态温度分布，其中，在稳态加热功率集成模拟中，在每个时间步进行线性模拟。在这个模拟中需要密度分布和边缘温度。
Transport simulation is performed by integrated code using reduced transport models (Toda S et al 2019 Phys. Plasmas 26 012510) in a kinetic electron condition for turbulent heat transport including the effect of zonal flows in helical plasmas. A reduced model can be formulated for the heat diffusivity using only the linear properties, or can be constructed by considering the expression of the quasilinear flux. These reduced models reproduce nonlinear gyrokinetic simulation results for ion temperature gradient mode turbulence by a linear growth rate and zonal flow decay time. Temperature profiles can be obtained when the turbulent heat transport is evaluated by reduced models at each time step in the evolution of integrated simulation. Computational cost using the reduced models where linear gyrokinetic simulation is performed at each time step in the integrated simulation is about two orders of magnitude lower than that using nonlinear gyrokinetic simulation. Stationary temperature profiles are predicted by simulation, in which, the linear simulation is performed at each time step in the integrated simulation for steady heating power. The density profile and the edge temperature are needed in this simulation.