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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Classical turbulence theory assumes that energy transport in a 3D turbulentflow proceeds through a Richardson cascade whereby larger vortices successivelydecay into smaller ones. By contrast, an additional inverse cascadecharacterized by vortex growth exists in 2D fluids and gases, with profoundimplications for meteorological flows and fluid mixing. The possibility of ahelicity-driven inverse cascade in 3D fluids had been rejected in the 1970sbased on equilibrium-thermodynamic arguments. Recently, however, it wasproposed that certain symmetry-breaking processes could potentially trigger a3D inverse cascade, but no physical system exhibiting this phenomenon has beenidentified to date. Here, we present analytical and numerical evidence for theexistence of an inverse energy cascade in an experimentally validated 3D activefluid model, describing microbial suspension flows that spontaneously breakmirror symmetry. We show analytically that self-organized scale selection, ageneric feature of many biological and engineered nonequilibrium fluids, cangenerate parity-violating Beltrami flows. Our simulations further demonstratehow active scale selection controls mirror-symmetry breaking and the emergenceof a 3D inverse cascade.

Spontaneous mirror-symmetry breaking induces inverse energy cascade in 3D active fluids