A LES-Langevin model for turbulence

A LES-Langevin model for turbulence

We propose a new model of turbulence for use in large-eddy simulations (LES). The turbulent force, represented here by the turbulent Lamb vector, is divided in two contributions. The contribution including only subfilter fields is deterministically modeled through a classical eddy-viscosity. The other contribution including both filtered and subfilter scales is dynamically computed as solution ...

LES of stratified turbulence

Turbulence Pro les with Generalized

The results obtained from 3398 vertical prooles of atmospheric turbulence measured during 11 nights at the Observatorio Astronn omico Nacional in San Pedro MM artir (Baja California, M exico) are presented. The observations were carried out with the generalized scidar (GS) installed at the 1.5 m and the 2.1 m telescopes of that site, in March and April 1997. The open air seeing was measured wit...

investigating the feasibility of a proposed model for geometric design of deployable arch structures

deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...

LES of canonical shock-turbulence interaction

The interaction between shock waves and turbulence is present in a large variety of high-speed flows with relevance in scientific and engineering applications. The use of largeeddy simulations (LES) to predict such flows requires subgrid-scale (SGS) models capable of accurately representing the physics behind this interaction at the unresolved scales. The canonical shock-turbulence interaction ...