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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Relevance of collisionality in the transport model assumptions for divertor detachment multi-fluid modelling on JET
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Relevance of collisionality in the transport model assumptions for divertor detachment multi-fluid modelling on JET

机译：射流分离多流体模型在运输模型假设中碰撞性的相关性

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摘要

A revised formulation of the perpendicular diffusive transport model in 2D multi-fluid edge codes is proposed. Based on theoretical predictions and experimental observations a dependence on collisionality is introduced into the transport model of EDGE2D-EIRENE. The impact on time-dependent JET gas fuelled ramp-up scenario modelling of the full transient from attached divertor into the high-recycling regime, following a target flux roll over into divertor detachment, ultimately ending in a density limit is presented. A strong dependence on divertor geometry is observed which can mask features of the new transport model: a smoothly decaying target recycling flux roll over, an asymmetric drop of temperature and pressure along the field lines as well as macroscopic power dependent plasma oscillations near the density limit which had been previously observed also experimentally. The latter effect is strongest for scenarios with strike points on vertical targets and vanishes in case of asymmetric divertor configurations.
机译：提出了二维多流体边缘码中垂直扩散传输模型的修正公式。基于理论预测和实验观察，将对碰撞性的依赖性引入了EDGE2D-EIRENE的传输模型中。提出了目标磁通量过渡到分流器分离，最终以密度极限结束后，从连接的分流器进入高再循环状态的完整瞬变对随时间变化的JET气体供油的加速情景建模的影响。观察到强烈依赖于偏滤器的几何形状，这可能掩盖了新传输模型的特征：平滑衰减的目标回收通量翻滚，沿磁力线的温度和压力不对称下降以及在密度极限附近的宏观功率相关等离子体振荡以前也通过实验观察到了这一点。对于在垂直目标上具有打击点的场景，后一种效果最明显;在不对称分流器配置的情况下，后一种效果消失。

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