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 here analyze the propagation of transients of fluid-rock temperature andpressure through a thin boundary layer, where a steady trend is present,between two adjacent homogeneous rocks. We focus on the effect of convection ontransients crossing such thin layer. In comparison with early models where thisboundary was assumed a sharp mathematical plane separating the two rocks, herewe show a realistic analysis of such boundary layer that implies a novelnonlinear model. Its solutions describe large amplitude, quick and sharptransients characterized by a novel drift and variations of the signalamplitude, leading to a nonlinear wave propagation. Possible applications arein volcanic, hydrologic, hydrothermal systems as well as for deep oil drilling.In addition, this formalism could easily be generalized for the case of asignal arriving in a rock characterized by a steady trend of pressure and/ortemperature. These effects, being proportional to the initial conditions, canalso give velocity variations not particularly important. A further heuristicmodel has therefore been analyzed, i.e. assuming a pressure dependent rockpermeability. In this way, a remarkable increase of the system velocities isobtained.

On the effect of a two-rocks boundary on the propagation of nonlinear transients of temperature and pressure in deformable porous rocks