Results 91 to 100 of about 1,079 (166)

Energy-Entropy-Momentum integration of discrete thermo-visco-elastic dynamics.

, 2011
A novel time integration scheme is presented for the numerical solution of the dynamics of discrete systems consisting of point masses and thermo-visco-elastic springs.
García Orden, Juan Carlos, Romero Olleros, Ignacio   +1 more
core  

A Lagrangian particle model for one-dimensional transient pipe flow with moving boundary

Engineering Applications of Computational Fluid Mechanics
For simulating fluid transients in pipelines with moving water-air interface, a one-dimensional Lagrangian particle model with second-order accuracy in both space and time is proposed.
Yuejin Cai, Jianguo Wei, Qingzhi Hou, Huaicheng Fan, Arris S. Tijsseling   +4 more
doaj   +1 more source

A minimal-variable symplectic integrator on spheres

Mathematics of Computation, 2016
We construct a symplectic, globally defined, minimal-variable, equivariant integrator on products of 2-spheres. Examples of corresponding Hamiltonian systems, called spin systems, include the reduced free rigid body, the motion of point vortices on a sphere, and the classical Heisenberg spin chain, a spatial discretisation of the ...
Robert I. McLachlan, Klas Modin, Olivier Verdier   +2 more
openaire   +2 more sources

Variational Time Integrators in Computational Solid Mechanics [PDF]

, 2003
This thesis develops the theory and implementation of variational integrators for computational solid mechanics problems, and to some extent, for fluid mechanics problems as well.
Lew, Adrián José
core   +1 more source

Symplectic methods in circular accelerators [PDF]

, 1993
By now symplectic integration has been applied to many problems in classical mechanics. It is my conviction that the field of particle simulation in circular rings is ideally suited for the application of symplectic integration.
Forest, E, Forest, E.
core  

Quantum dynamical Hamiltonian Monte Carlo

Physical Review Research
One of the open challenges in quantum computing is to find meaningful and practical methods to leverage quantum computation to accelerate classical machine-learning workflows.
Owen Lockwood, Peter Weiss, Filip Aronshtein, Guillaume Verdon   +3 more
doaj   +1 more source

Contour dynamics with symplectic time integration

, 1997
In this paper we consider the time evolution of vortices simulated by the method of contour dynamics. Special attention is being paid to the Hamiltonian character of the governing equations and in particular to the conservational properties of numerical ...
Mattheij, R.M.M., Vosbeek, P.W.C.
core   +1 more source

Solar System material reaching neighboring star systems

Astronomy & Astrophysics
Context. In our Solar System, few macroscopic objects have been observed to be moving in hyperbolic orbits and, thus, they must have originated from interstellar space. Some meteoroids are also suspected to have an interstellar origin.
Neslušan L., Janák F., Nagy R., Hajduková M.   +3 more
doaj   +1 more source

A modified equations approach for multi-symplectic integration methods.

, 2018
A useful method for understanding discretization error in the numerical solution of ODEs is to compare the system of ODEs with the modified equations, the equations solved by the numerical solution, which are obtained through backward error analysis ...
Moore, Brian Edward.
core  

Symplectic integration approach for metastable systems

, 2006
Nonadiabatic behavior of metastable systems modeled by anharmonic Hamiltonians is reproduced by the Fokker-Planck and imaginary time Schrödinger equation scheme with subsequent symplectic integration.
E. Klotins
core   +1 more source