Results 21 to 30 of about 55,201 (283)
High accuracy binary black hole simulations with an extended wave zone [PDF]
, 2009 We present results from a new code for binary black hole evolutions using the moving-puncture approach, implementing finite differences in generalised coordinates, and allowing the spacetime to be covered with multiple communicating non-singular ...
A. Ashtekar +10 more
core +3 more sources
A three-dimensional Galactic extinction model [PDF]
, 2003 A large-scale three-dimensional model of Galactic extinction is presented based on the Galactic dust distribution model of Drimmel and Spergel (2001). The extinction A_V to any point within the Galactic disk can be quickly deduced using a set of three ...
A. Cabrera-Lavers +32 more
core +1 more source
Stable boundary conditions for Cartesian grid calculations [PDF]
Computing Systems in Engineering, 1990 The inviscid Euler equations in complicated geometries are solved using a Cartesian grid. This requires solid wall boundary conditions in the irregular grid cells near the boundary. Since these cells may be orders of magnitude smaller than the regular grid cells, stability is a primary concern.
M.J. Berger, R.J. LeVeque
openaire +1 more source
Applied SciencesTo address the limitations of poor robustness, low efficiency, and memory waste in traditional Cartesian grid generation, this paper proposes targeted improvements focusing on three key aspects: the surface mesh data structure, the Cartesian grid data ...
Shuang Meng +5 more
doaj +1 more source
Charge transfer excitations with range separated functionals using improved virtual orbitals
, 2018 We present an implementation of range separated functionals utilizing the Slater-function on grids in real space in the projector augmented waves method.
Walter, Michael, Würdemann, Rolf
core +2 more sources
Bijective Rigid Motions of the 2D Cartesian Grid [PDF]
, 2016 Rigid motions are fundamental operations in image processing. While they are bijective and isometric in $$\mathbb {R}^2$$, they lose these properties when digitized in $$\mathbb {Z}^2$$. To investigate these defects, we first extend a combinatorial model of the local behavior of rigid motions on $$\mathbb {Z}^2$$, initially proposed by Nouvel and ...
Pluta, Kacper +3 more
openaire +1 more source
LES of Internal Combustion Engine Flows Using Cartesian Overset Grids
Oil & Gas Science and Technology, 2017 Accurate computations of turbulent flows using the Large-Eddy Simulation (LES) technique with an appropriate SubFilter Scale (SFS) model require low artificial dissipation such that the physical energy cascade process is not perturbed by numerical ...
Falkenstein Tobias +7 more
doaj +1 more source
A Navier-Stokes Solver for Compressible Turbulent Flows on Quadtree and Octree Based Cartesian Grids
Journal of Applied Fluid Mechanics, 2019 Cartesian grids represent a special extent in unstructured grid literature. They employ chiefly created algorithms to produce automatic meshing while simulating flows around complex geometries without considering shape of the bodies.
E. Kara, A. İ. Kutlar, M. H. Aksel
doaj +2 more sources
A numerical method for multiphysics simulations based on hierarchical Cartesian grids
Journal of Fluid Science and Technology, 2015 We present a numerical method based on hierarchical Cartesian grids for the simulation of multiphysics problems, here in particular for the conjugate heat transfer between a fluid and a solid.
Gonzalo BRITO GADESCHI +3 more
doaj +1 more source
Immersed Boundary Method Using Ghost Cells in a Three-Dimensional Case
Современные информационные технологии и IT-образование, 2020 When solving numerically gas dynamics problems, one often encounters difficulties in processing regions with complex geometry. Generating consistent computational grids for such areas may be a complex task.
Alexey Rybakov
doaj +1 more source