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Journal Articles

A New hybrid kinetic electron model for full-f gyrokinetic simulations

Idomura, Yasuhiro

Journal of Computational Physics, 313, p.511 - 531, 2016/05

 Times Cited Count:28 Percentile:93.28(Computer Science, Interdisciplinary Applications)

A new hybrid kinetic electron model is developed for electrostatic full-f gyrokinetic simulations of the ion temperature gradient driven trapped electron mode (ITG-TEM) turbulence at the ion scale. In the model, a full kinetic electron model is applied to the full-f gyrokinetic equation, the multi-species linear Fokker-Planck collision operator, and an axisymmetric part of the gyrokinetic Poisson equation, while in a non-axisymmetric part of the gyrokinetic Poisson equation, turbulent fluctuations are determined only by kinetic trapped electrons responses. By using this approach, the so-called $$omega_H$$ mode is avoided with keeping important physics such as the ITG-TEM, the neoclassical transport, the ambipolar condition, and particle trapping and detrapping processes. The model enables full- f gyrokinetic simulations of ITG-TEM turbulence with a reasonable computational cost.

Journal Articles

Meshless method for solving fixed boundary problem of plasma equilibrium

Imazawa, Ryota; Kawano, Yasunori; Itami, Kiyoshi

Journal of Computational Physics, 292, p.208 - 214, 2015/07

 Times Cited Count:5 Percentile:41.4(Computer Science, Interdisciplinary Applications)

no abstracts in English

Journal Articles

A High-precision calculation method for interface normal and curvature on an unstructured grid

Ito, Kei; Kunugi, Tomoaki*; Ohno, Shuji; Kamide, Hideki; Ohshima, Hiroyuki

Journal of Computational Physics, 273, p.38 - 53, 2014/09

 Times Cited Count:12 Percentile:67.37(Computer Science, Interdisciplinary Applications)

Journal Articles

Parallel filtering in global gyrokinetic simulations

Jolliet, S.; McMillan, B. F.*; Villard, L.*; Vernay, T.*; Angelino, P.*; Tran, T. M.*; Brunner, S.*; Bottino, A.*; Idomura, Yasuhiro

Journal of Computational Physics, 231(3), p.745 - 758, 2012/02

 Times Cited Count:11 Percentile:60.56(Computer Science, Interdisciplinary Applications)

Journal Articles

Dynamic transport simulation code including plasma rotation and radial electric field

Honda, Mitsuru; Fukuyama, Atsushi*

Journal of Computational Physics, 227(5), p.2808 - 2844, 2008/02

 Times Cited Count:15 Percentile:65.95(Computer Science, Interdisciplinary Applications)

Journal Articles

New conservative gyrokinetic full-$$f$$ Vlasov code and its comparison to gyrokinetic $$delta f$$ particle-in-cell code

Idomura, Yasuhiro; Ida, Masato; Tokuda, Shinji; Villard, L.*

Journal of Computational Physics, 226(1), p.244 - 262, 2007/09

 Times Cited Count:30 Percentile:79.83(Computer Science, Interdisciplinary Applications)

A new conservative gyrokinetic full-$$f$$ Vlasov code is developed using a finite difference operator which conserves both the $$L1$$ and $$L2$$ norms. The growth of numerical oscillations is suppressed by conserving the $$L2$$ norm, and the code is numerically stable and robust in a long time simulation. In the slab ion temperature gradient driven (ITG) turbulence simulation, the energy conservation and the entropy balance relation are confirmed, and solutions are benchmarked against a conventional $$delta f$$ particle-in-cell (PIC) code. The results show that the exact particle number conservation and the good energy conservation in the conservative Vlasov simulation are advantageous for a long time micro-turbulence simulation. In the comparison, physical and numerical effects of the $$v_parallel$$ nonlinearity are clarified for the Vlasov and PIC simulations.

Journal Articles

A Note on the basis set approach in the constrained interpolation profile method

Utsumi, Takayuki*; Yabe, Takashi*; Koga, J. K.; Aoki, Takayuki*; Sekine, Masatoshi*; Ogata, Yoichi*; Matsunaga, Eiichi*

Journal of Computational Physics, 196(1), p.1 - 7, 2004/05

 Times Cited Count:3 Percentile:21.31(Computer Science, Interdisciplinary Applications)

no abstracts in English

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