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 Tools annual

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 Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The blending of hydrogen generated using clean energy into natural gaspipeline networks is proposed in order to utilize existing energy systems fortheir planned lifetimes while reducing their reliance on fossil fuels. Weformulate a system of partial differential equations (PDEs) that govern theflow dynamics of mixtures of gases in pipeline networks under the influence oftime-varying compressor and regulator control actions. The formulation isderived for general gas networks that can inject or withdraw arbitrarytime-varying mixtures of gases into or from the network at arbitrarilyspecified nodes. The PDE formulation is discretized in space to form anonlinear control system that is used to prove that homogeneous mixtures arewell-behaved and heterogeneous mixtures may be ill-behaved in the sense ofmonotone-ordering of solutions. We use numerical simulations to computeinterfaces in the parameter region of sinusoidal boundary conditions thatdelimit monotonic, periodic, and chaotic system responses. The interfacessuggest that any solution in the monotonic response region is not chaotic andwill eventually approach a periodic orbit. The results are demonstrated usingexamples for a single pipeline and a small test network.

Transitions from Monotonicity to Chaos in Gas Mixture Dynamics in Pipeline Networks