Zobrazeno 1 - 10
of 351
pro vyhledávání: '"CONSTANTINESCU, A. M."'
Autor:
Kang, Shinhoo, Constantinescu, Emil M.
The growing computing power over the years has enabled simulations to become more complex and accurate. While immensely valuable for scientific discovery and problem-solving, however, high-fidelity simulations come with significant computational dema
Externí odkaz:
http://arxiv.org/abs/2310.18897
In this work we consider a relativistic drift-kinetic model for runaway electrons along with a Fokker-Planck operator for small-angle Coulomb collisions, a radiation damping operator, and a secondary knock-on (Boltzmann) collision source. We develop
Externí odkaz:
http://arxiv.org/abs/2303.17019
Autor:
Kang, Shinhoo, Constantinescu, Emil M.
We propose a new approach to learning the subgrid-scale model when simulating partial differential equations (PDEs) solved by the method of lines and their representation in chaotic ordinary differential equations, based on neural ordinary differenti
Externí odkaz:
http://arxiv.org/abs/2212.09967
This paper explores strategies to transform an existing CPU-based high-performance computational fluid dynamics solver, HyPar, for compressible flow simulations on emerging exascale heterogeneous (CPU+GPU) computing platforms. The scientific motivati
Externí odkaz:
http://arxiv.org/abs/2211.16718
Autor:
Kang, Shinhoo, Dener, Alp, Hamilton, Aidan, Zhang, Hong, Constantinescu, Emil M., Jacob, Robert L.
Earth system models are complex integrated models of atmosphere, ocean, sea ice, and land surface. Coupling the components can be a significant challenge due to the difference in physics, temporal, and spatial scales. This study explores new coupling
Externí odkaz:
http://arxiv.org/abs/2202.11890
Autor:
Constantinescu, Emil M.
We propose a new method that extends conservative explicit multirate methods to implicit explicit-multirate methods. We develop extensions of order one and two with different stability properties on the implicit side. The method is suitable for time-
Externí odkaz:
http://arxiv.org/abs/2112.10568
Publikováno v:
In Journal of Computational Physics 15 June 2024 507
Autor:
Kang, Shinhoo, Constantinescu, Emil M.
We propose entropy-preserving and entropy-stable partitioned Runge--Kutta (RK) methods. In particular, we extend the explicit relaxation Runge--Kutta methods to IMEX--RK methods and a class of explicit second-order multirate methods for stiff problem
Externí odkaz:
http://arxiv.org/abs/2108.08908
Earth system models are composed of coupled components that separately model systems such as the global atmosphere, ocean, and land surface. While these components are well developed, coupling them in a single system can be a significant challenge. C
Externí odkaz:
http://arxiv.org/abs/2101.09263
In this paper we present a probabilistic analysis framework to estimate behind-the-meter photovoltaic generation in real time. We develop a forward model consisting of a spatiotemporal stochastic process that represents the photovoltaic generation an
Externí odkaz:
http://arxiv.org/abs/2004.10334