Journal of Computational Physics

Journal: Journal of Computational Physics

Abbreviation

J. comput. phys.

Publisher

Elsevier

ISSN

0021-9991
1090-2716

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Publications 1 - 10 of 199

A multiresolution remeshed Vortex-In-Cell algorithm using patches
Rasmussen, Johannes Tophøj; Cottet, Georges-Henri; Walther, Jens Honoré (2011)
Journal of Computational Physics
Vortex methods with spatially varying cores
Cottet, Georges-Henri; Koumoutsakos, Petros; Salihi, Mohamed Lemine Ould (2000)
Journal of Computational Physics
The accuracy of vortex methods employing smooth vortex particles/blobs is determined by the blob size, which can be viewed as a mollifier of the vorticity field. For computational efficiency, this core size needs to be spatially variable as particles are used to discretize different parts of the flow field, such as the boundary layer and the wake in bluff body flows. We derive here a consistent approximation for the viscous Navier–Stokes equations using variable size vortex particles. This derivation is based on the implementation of mappings that allow the consistent formulation of the diffusion and convection operators of the Navier–Stokes equations in the context of vortex methods. Several local mappings can be combined giving the capability of “mesh-embedding” to vortex methods. It is shown that the proposed variable method offers a significant improvement on the computational efficiency of constant core size methods while maintaining the adaptive character of the method. The method is ideally suited to flows such as wakes and shear layers and the validity of the approach is illustrated by showing results from cylinder flows and wall-vortex interactions. Using this scheme, previously unattainable simulations of cylinders undergoing rotary oscillations at high Reynolds numbers reveal an interesting mechanism for drastic drag reduction.
A Fourier-based elliptic solver for vortical flows with periodic and unbounded directions
Chatelain, Philippe; Koumoutsakos, Petros (2010)
Journal of Computational Physics
Automatic mesh refinement and parallel load balancing for Fokker–Planck-DSMC algorithm
Küchlin, Stephan; Jenny, Patrick (2018)
Journal of Computational Physics
A novel adaptive time stepping variant of the Boris-Buneman integrator for the simulation of particle accelerators with space charge
Toggweiler, Matthias; Adelmann, Andreas; Arbenz, Peter; et al. (2014)
Journal of Computational Physics
A fully spectral methodology for magnetohydrodynamic calculations in a whole sphere
Marti, Philippe; Jackson, Andrew (2016)
Journal of Computational Physics
Direct numerical simulation of incompressible flows on parallel Octree grids
Egan, Raphael; Guittet, Arthur; Temprano-Coleto, Fernando; et al. (2021)
Journal of Computational Physics
Fractional Adams-Bashforth/Moulton methods: An application to the fractional Keller-Segel chemotaxis system
Zayernouri, Mohsen; Matzavinos, Anastasios (2016)
Journal of Computational Physics
Unconditionally convergent nonlinear solver for hyperbolic conservation laws with S-shaped flux functions
Jenny, Patrick; Tchelepi, Hamdi A.; Lee, Seong H. (2009)
Journal of Computational Physics
A Lagrangian, stochastic modeling framework for multi-phase flow in porous media
Tyagi, Manav; Jenny, Patrick; Lunati, Ivan; et al. (2008)
Journal of Computational Physics

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