Model dynamics on a multigrid across multiple length and time scales

Details Model dynamics on a multigrid across multiple length and time scales Model dynamics on a multigrid across multiple length and time scales

2008-02-08

arxiv.org/abs/0802.1098v1

Nonlinear Sciences

Cellular Automata and Lattice Gases

Scientific paper

Most methods for modelling dynamics posit just two time scales: a fast and a slow scale. But many applications, including many in continuum mechanics, possess a wide variety of space-time scales; often they possess a continuum of space-time scales. I discuss an approach to modelling the discretised dynamics of advection and diffusion with rigorous support for changing the resolved spatial grid scale by just a factor of two. The mapping of dynamics from a finer grid to a coarser grid is then iterated to generate a hierarchy of models across a wide range of space-time scales, all with rigorous support across the whole hierarchy. This approach empowers us with great flexibility in modelling complex dynamics over multiple scales.

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