Impact of equilibrium radial electric field on energy loss process after pedestal collapse
Impact of equilibrium radial electric field on energy loss process after pedestal collapse
复制标题
平衡径向电场对基座倒塌后能量损失过程的影响
DOI：
10.1002/ctpp.201900158
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发表时间：
2020
影响因子：
1.6
通讯作者：
Yagi Masatoshi
中科院分区：
文献类型：
--
作者：
Seto Haruki;Xu X.Q.;Dudson Benjamin D.;Yagi Masatoshi
利用Bout++框架，数值研究了平衡径向电场对底座倒塌后能量损失过程的影响。通过线性稳定性分析，证明了平衡径向电场的径向剪切使阻性气球模稳定。另一方面，如果考虑平衡径向电场，则底座倒塌后的能量损失水平增加。时空和相图分析表明，平衡径向电场部分抵消了涨落驱动的环向轴对称径向电场，削弱了底座坍塌后的切变率，削弱了涡旋剪切对湍流的抑制作用。因此，平衡径向电场增加了压力梯度、E×B剪切率和湍流强度之间的非线性循环振荡中的湍流强度，从而导致随后的湍流输运爆发，并增加了能量损失水平。
An impact of the equilibrium radial electric field on energy loss processes after pedestal collapse is numerically investigated using the BOUT++ framework. Using linear stability analysis, the resistive ballooning mode is shown to be stabilized by the radial shear of the equilibrium radial electric field. On the other hand, the energy loss level after the pedestal collapse increases if the equilibrium radial electric field is taken into account. The spatio‐temporal and phase diagram analyses show that the equilibrium radial electric field partially cancels the fluctuation‐driven toroidally axisymmetric radial electric field and weakens theE×Bshearing rate after pedestal collapse, weakening the turbulence suppression by vortex shearing. The equilibrium radial electric field therefore increases turbulence intensity in nonlinear cyclic oscillations among pressure gradient,E×Bshearing rate, and turbulence intensity, which gives rise to subsequent bursts of turbulent transport and increases the energy loss level.
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影响因子：
2.2
作者：
B. Dudson;X. Q. Xu;M. V. Umansky;H. Wilson;P. Snyder
通讯作者：
B. Dudson;X. Q. Xu;M. V. Umansky;H. Wilson;P. Snyder
1.5 GW级聚变发电DEMO的功率排放和偏滤器设计研究
影响因子：
3.3
作者：
N. Asakura;K. Hoshino;S. Suzuki;S. Tokunaga;Y. Someya;H. Utoh;Hironobu Kudo;Y. Sakamoto;R. Hiwatari;K. Tobita;K. Shimizu;K. Ezato;Y. Seki;N. Ohno;Y. Ueda;Joint Special Team for Demo Design
通讯作者：
Joint Special Team for Demo Design
影响因子：
2.2
作者：
B. Dudson;J. Leddy
通讯作者：
B. Dudson;J. Leddy
影响因子：
6.3
作者：
Dudson, B. D.;Umansky, M. V.;Wilson, H. R.
通讯作者：
Wilson, H. R.