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 developed a computational framework for simulating thin fluid flow innarrow interfaces between contacting solids, which is relevant for a range ofengineering, biological and geophysical applications. The treatment of thisproblem requires coupling between fluid and solid mechanics equations, furthercomplicated by contact constraints and potentially complex geometrical featuresof contacting surfaces. We developed a monolithic finite-element framework forhandling mechanical contact, thin incompressible viscous flow and fluid-inducedtractions on the surface of the solid, suitable for both one- and two-waycoupling approaches. Additionally, we consider the possibility of fluidentrapment in "pools" delimited by contact patches and its pressurisationfollowing a non-linear compressibility constitutive law. Furthermore, imageanalysis algorithms were adapted to identify the local status of each interfaceelement within the Newton-Raphson loop. First, an application of the proposedframework for a problem with a model geometry is given, and the robustness isdemonstrated by the residual-wise and status-wise convergence. The fullcapability of the developed two-way coupling framework is demonstrated on aproblem of a fluid flow in contact interface between a solid withrepresentative rough surface and a rigid flat. The evolution of the contactpressure, fluid flow pattern and the morphology of trapped fluid zones untilthe complete sealing of the interface is displayed. Additionally, wedemonstrated an almost mesh-independent result of a refined post-processingapproach to the real contact-area computation. The developed framework permitsnot only to study the evolution of effective properties of contact interfaces,but also to highlight the difference between one- and two-way couplingapproaches and to quantify the effect of multiple trapped fluid "pools" on thecoupled problem.

Computational framework for monolithic coupling for thin fluid flow in contact interfaces