Zobrazeno 1 - 10
of 748
pro vyhledávání: '"CHACON, L."'
We propose a second-order temporally implicit, fourth-order-accurate spatial discretization scheme for the strongly anisotropic heat transport equation characteristic of hot, fusion-grade plasmas. Following [Du Toit et al., Comp. Phys. Comm., 228 (20
Externí odkaz:
http://arxiv.org/abs/2409.06070
Autor:
Chacon, L., Di Giannatale, G.
We extend the recently proposed semi-Lagrangian algorithm for the extremely anisotropic heat transport equation [Chac\'on et al., J. Comput. Phys., 272 (2014)] to deal with arbitrary magnetic field topologies. The original scheme (which showed remark
Externí odkaz:
http://arxiv.org/abs/2408.02829
Coulomb collisions in particle simulations for weakly coupled plasmas are modeled by the Landau-Fokker-Planck equation, which is typically solved by Monte-Carlo (MC) methods. One of the main disadvantages of MC is the timestep accuracy constraint {\n
Externí odkaz:
http://arxiv.org/abs/2405.09573
Autor:
Koshkarov, O., Chacon, L.
In this paper, we extend the operator-split asymptotic-preserving, semi-Lagrangian algorithm for time dependent anisotropic heat transport equation proposed in [Chac\'on et al., JCP, 272, 719-746, 2014] to use a fully implicit time integration with b
Externí odkaz:
http://arxiv.org/abs/2404.08771
Autor:
Ricketson, L.F., Chacón, L.
Publikováno v:
In Journal of Computational Physics 15 September 2024 513
Autor:
Iakovidis, D. K., Ooi, M., Kuang, Y. C., Demidenko, S., Shestakov, A., Sinitsin, V., Henry, M., Sciacchitano, A., Discetti, A., Donati, S., Norgia, M., Menychtas, A., Maglogiannis, I., Wriessnegger, S. C., Chacon, L. A. Barradas, Dimas, G., Filos, D., Aletras, A. H., Töger, J., Dong, F., Ren, S., Uhl, A., Paziewski, J., Geng, J., Fioranelli, F., Narayanan, R. M., Fernandez, C., Stiller, C., Malamousi, K., Kamnis, S., Delibasis, K., Wang, D., Zhang, J., Gao, R. X.
Publikováno v:
Measurement Science and Technology 33(1) (2022) 1-48
Signal processing is a fundamental component of almost any sensor-enabled system, with a wide range of applications across different scientific disciplines. Time series data, images, and video sequences comprise representative forms of signals that c
Externí odkaz:
http://arxiv.org/abs/2111.02493
Autor:
Stanier, A., Chacon, L.
The hybrid kinetic-ion fluid-electron plasma model is widely used to study challenging multi-scale problems in space and laboratory plasma physics. Here, a novel conservative scheme for this model employing implicit particle-in-cell techniques is ext
Externí odkaz:
http://arxiv.org/abs/2110.03886
Autor:
Sturdevant, Benjamin J., Ku, S., Chacón, L., Chen, Y., Hatch, D., Cole, M. D. J., Sharma, A. Y., Adams, M. F., Chang, C. S., Parker, S. E., Hager, R.
A fully implicit particle-in-cell method for handling the $v_\parallel$-formalism of electromagnetic gyrokinetics has been implemented in XGC. By choosing the $v_\parallel$-formalism, we avoid introducing the non-physical skin terms in Amp\`{e}re's l
Externí odkaz:
http://arxiv.org/abs/2106.06681
We propose an unsupervised machine-learning checkpoint-restart (CR) algorithm for particle-in-cell (PIC) algorithms using Gaussian mixtures (GM). The algorithm features a particle compression stage and a particle reconstruction stage, where a continu
Externí odkaz:
http://arxiv.org/abs/2007.12273
The quasi-neutral hybrid particle-in-cell algorithm with kinetic ions and fluid electrons is a popular model to study multi-scale problems in laboratory, space, and astrophysical plasmas. Here, it is shown that the treatment of ions as finite-size pa
Externí odkaz:
http://arxiv.org/abs/1912.04860