English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

: We consider the one dimensional porous media problem. We describe a simple difference scheme based on this transformation and show that, even with a fairly crude mesh, the free boundary is tracked quite accurately. We study degenerate diffusion problems in which free boundaries occur, our major objective being the development of numerical procedures which effectively track these boundaries. For convenience, we introduce our ideas in terms of the one- dimensional porous media problem; generalizations are given. Originator-supplied key words include: Parabolic equations, Porous media, Free boundaries.

A coordinate transformation for the porous media equation that renders the free boundary stationary