Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Knepley, M. G."'
Publikováno v:
IEEE International Parallel and Distributed Processing Symposium (IPDPS), 2022
Collisional processes are critical in the understanding of non-Maxwellian plasmas. The Landau form of the Fokker-Planck equation is the gold standard for modeling collisions in most plasmas, however O(N^2) work complexity inhibits its widespread use.
Externí odkaz:
http://arxiv.org/abs/2104.10000
The global total-$f$ gyrokinetic particle-in-cell code XGC, used to study transport in magnetic fusion plasmas, implements a continuum grid to perform the dissipative operations, such as plasma collisions. To transfer the distribution function betwee
Externí odkaz:
http://arxiv.org/abs/2012.11764
The objective of this paper is twofold. First, we propose two composable block solver methodologies to solve the discrete systems that arise from finite element discretizations of the double porosity/permeability (DPP) model. The DPP model, which is
Externí odkaz:
http://arxiv.org/abs/1808.08328
We present a parallel computing strategy for a hybridizable discontinuous Galerkin (HDG) nested geometric multigrid (GMG) solver. Parallel GMG solvers require a combination of coarse-grain and fine-grain parallelism to improve time to solution perfor
Externí odkaz:
http://arxiv.org/abs/1705.09907
Important computational physics problems are often large-scale in nature, and it is highly desirable to have robust and high performing computational frameworks that can quickly address these problems. However, it is no trivial task to determine whet
Externí odkaz:
http://arxiv.org/abs/1705.03625
Publikováno v:
SIAM Journal on Scientific Computing, 39 (6), 2017
The Landau collision integral is an accurate model for the small-angle dominated Coulomb collisions in fusion plasmas. We investigate a high order accurate, fully conservative, finite element discretization of the nonlinear multi-species Landau integ
Externí odkaz:
http://arxiv.org/abs/1702.08880
Understanding the behavior of biomolecules such as proteins requires understanding the critical influence of the surrounding fluid (solvent) environment--water with mobile salt ions such as sodium. Unfortunately, for many studies, fully atomistic sim
Externí odkaz:
http://arxiv.org/abs/1505.06968
Autor:
MiniMax Collaboration, Brooks, T. C., Convery, M. E., Davis, W. L., Del Signore, K. W., Jenkins, T. L., Kangas, E., Knepley, M. G., Kowalski, K. L., Taylor, C. C., Oh, S. H., Walker, W. D., Colestock, P. L., Hanna, B., Martens, M., Streets, J., Ball, R. C., Gustafson, H. R., Jones, L. W., Longo, M. J., Bjorken, J. D., Abashian, A., Morgan, N., Pruneau, C. A.
Publikováno v:
Phys.Rev.D61:032003,2000
We present results from MiniMax (Fermilab T-864), a small test/experiment at the Tevatron designed to search for the production of disoriented chiral condensate (DCC) in $p - \bar p$ collisions at $\sqrt{s} = 1.8$ TeV in the forward direction, $\sim
Externí odkaz:
http://arxiv.org/abs/hep-ex/9906026
Autor:
Brooks, T. C., Convery, M. E., Davis, W. L., Delsignore, K. W., Jenkins, T. L., Kangas, E., Knepley, M. G., Kowalski, K. L., Taylor, C. C., Oh, S. H., Walker, W. D., Colestock, P. L., Hanna, B., Martens, M., Streets, J., Ball, R., Gustafson, H. R., Jones, L. W., Longo, M. J., Bjorken, J. D., Abashian, A., Morgan, N., Pruneau, C. A.
We report on the progress of a search for disoriented chiral condensates (DCCs) in the far forward region at sqrt(s)=1.8 TeV. MiniMax is a small collider experiment situated at the C0 interaction region of the Tevatron and has been designed to measur
Externí odkaz:
http://arxiv.org/abs/hep-ex/9608012
Publikováno v:
Phys.Rev.D48:2548-2562,1993
Low-harmonic formulas for closed relativistic strings are given. General parametrizations are presented for the addition of second- and third-harmonic waves to the fundamental wave. The method of determination of the parametrizations is based upon a
Externí odkaz:
http://arxiv.org/abs/hep-th/9307077