Positioning of computational nodes

From Medusa: Coordinate Free Mehless Method implementation
Revision as of 21:32, 15 January 2018 by Gkosec (talk | contribs) (Filling the domain with nodes)

Jump to: navigation, search

Although the meshless methods do not require any topological relations between nodes and even randomly distributed nodes could be used, it is well-known that using regularly distributed nodes leads to more accurate and more stable results. So despite meshless seeming robustness regarding the nodal distribution, a certain effort has to be invested into the positioning of the nodes and following discussion, to some extent, deals with this problem. In a following discussion we want to form set of algorithms that can cover arbitrary domain in n dimensions with nodes that can be further used to solve systems of PDEs. We start with algorithms for filling the domain with nodes. Second set is denoted to improving the nodal distributions and a last set of algorithms deals with the refinement of the nodal distribution. The algorithms can of course be combined.

Filling the domain with nodes

It is our goal to fill arbitrary domain, which we can ask if position $\b{p}$ is in the domain our outside, with nodes following the given target density function $\rho(\b{p})$.

Relaxation of the nodal distribution

Refinement of the nodal distribution

More details on refinement of the nodal distribution