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

In large-eddy simulations of atmospheric boundary layer turbulence, thelumped coefficient in the eddy-diffusion subgrid-scale (SGS) model is known todepend on scale for the case of inert scalars. This scale dependence ispredominant near the surface. In this paper, a scale-dependent dynamic SGSmodel for the turbulent transport of reacting scalars is implemented inlarge-eddy simulations of a neutral boundary layer. Since the model coefficientis computed dynamically from the dynamics of the resolved scales, thesimulations are free from any parameter tuning. A set of chemical casesrepresentative of various turbulent reacting flow regimes is examined. Thereactants are involved in a first-order reaction and are injected in theatmospheric boundary layer with a constant and uniform surface flux. Emphasisis placed on studying the combined effects of resolution and chemical regime onthe performance of the SGS model. Simulations with the scale-dependent dynamicmodel yield the expected trends of the coefficients as function of resolution,position in the flow and chemical regime, leading to resolution-independentturbulent reactant fluxes.

Subgrid-Scale Modeling of Reacting Scalar Fluxes in Large-Eddy Simulations of Atmospheric Boundary Layers