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首页> 外文期刊>Physics of plasmas >Development and testing of an unstructured mesh method for whole plasma gyrokinetic simulations in realistic tokamak geometry
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Development and testing of an unstructured mesh method for whole plasma gyrokinetic simulations in realistic tokamak geometry

机译：现实托卡马克几何整体血浆旋转模拟的非结构化网格方法的开发与测试

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摘要

In this work, we have formulated and implemented a mixed unstructured mesh-based finite element-Fourier decomposition scheme for gyrokinetic simulations in realistic tokamak geometry. An efficient particle positioning (particle-triangle mapping) scheme for the charge deposition and field scattering using an intermediate grid as the search index for triangles has been implemented, and a significant speed-up by a factor of similar to 30 is observed as compared with the brute force scheme for a medium-size simulation. The TRIMEG (TRIangular MEsh based Gyrokinetic) code has been developed. As an application, the ion temperature gradient (ITG) mode is simulated using the simplified gyrokinetic Vlasov-Poisson model. Our simulation and that using the ORB5 code for the DIII-D Cyclone case show reasonable agreement. As an additional application, ITG simulations using an ASDEX Upgrade equilibrium have been performed with density and temperature gradient profiles similar to the Cyclone case. Capabilities of the TRIMEG code for simulations with realistic experimental equilibria in the plasma core and in the whole plasma volume with open field lines are demonstrated. Published under license by AIP Publishing.
机译：在这项工作中，我们已经制定并实施的混合非结构化基于网格的有限元傅立叶分解方案在现实托卡马克几何gyrokinetic模拟。使用中间网格的电荷沉积和场散射的有效粒子定位（粒子三角形映射）方案，作为三角形的搜索索引，并且与相比相比观察到相似于30的显着加速。中型模拟的蛮力方案。已经开发了Trimeg（基于三角网的Gyrokinetic）代码。作为应用，使用简化的Gyrokinetic Vlasov-Poisson模型来模拟离子温度梯度（ITG）模式。我们的模拟和使用ORB5代码为DIII-D Cyclone案例显示合理的协议。作为额外的应用，已经使用与旋风壳类似的密度和温度梯度型材进行了使用ASDEX升级平衡的ITG模拟。用于与在等离子体芯并且与开放磁场线的全血浆体积现实实验平衡模拟的TRIMEG代码的能力证实。通过AIP发布在许可证下发布。

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