Direct comparison between RANS turbulence model and fully-resolved LES
نویسندگان
چکیده
منابع مشابه
Parametric study of a viscoelastic RANS turbulence model in the fully developed channel flow
One of the newest of viscoelastic RANS turbulence models for drag reducing channel flow with polymer additives is studied in different flow and rheological properties. In this model, finitely extensible nonlinear elastic-Peterlin (FENE-P) constitutive model is used to describe the viscoelastic effect of polymer solution and turbulence model is developed in the k-ϵ-(ν^2 ) ̅-f framework. The geome...
متن کاملFully-resolved LES of weakly separated flows
A high-accuracy large eddy simulation (LES) is applied to ows over a sphere and an underwater vehicle. Both objects have relatively weak separated stern ows that may depend upon the accurate resolution of turbulence structures in the attached ow regions upstream of the separation point. For the sphere we compute ows over a range of Reynolds numbers from subto super-critical (Re = 1 10 to Re = 1...
متن کاملCFD modeling of pollution dispersion in a street canyon: Comparison between LES and RANS
CFD modeling using RANS and LES of pollutant dispersion in a three-dimensional street canyon is investigated by comparison with measurements. The purpose of this study is to confirm the accuracy of LES in modeling plume dispersion in a simple street canyon model and to clarify the mechanism of the discrepancy in relation to RANS computation. Simple LES modeling is shown by comparison with wind ...
متن کاملA unified RANS-LES model: Computational development, accuracy and cost
5 Large eddy simulation (LES) is computationally extremely expensive for the investigation of wall-bounded turbulent flows at high Reynolds numbers. A way to reduce the computational cost of LES by orders of magnitude is to combine LES equations with Reynolds-averaged Navier-Stokes (RANS) equations used in the near-wall region. A large variety of such hybrid RANS-LES methods are currently in us...
متن کاملA fully resolved consensus between fully resolved phylogenetic trees.
Nowadays, there are many phylogeny reconstruction methods, each with advantages and disadvantages. We explored the advantages of each method, putting together the common parts of trees constructed by several methods, by means of a consensus computation. A number of phylogenetic consensus methods are already known. Unfortunately, there is also a taboo concerning consensus methods, because most b...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Gas Turbine, Propulsion and Power Systems
سال: 2016
ISSN: 1882-5079
DOI: 10.38036/jgpp.8.2_1