Journal of Marine Science and Engineering | |
An Explicit Algebraic Closure for Passive Scalar-Flux: Applications in Channel Flows at a Wide Range of Reynolds Numbers | |
FotosS. Stylianou1  Constantine Michailides2  Evangelos Akylas3  Elias Gravanis3  ConstantinosF. Panagiotou3  | |
[1] Computational Sciences Laboratory, UCY-CompSci, Department of Mechanical & Manufacturing Engineering, University of Cyprus, 2109 Nicosia, Cyprus;Department of Civil Engineering & Geomatics, Cyprus University of Technology, 3036 Limassol, Cyprus;Eratosthenes Centre of Excellence, Cyprus University of Technology, 3036 Limassol, Cyprus; | |
关键词: scalar-flux; RANS; algebraic model; channel flows; high Reynolds numbers; | |
DOI : 10.3390/jmse8110916 | |
来源: DOAJ |
【 摘 要 】
In this paper, we propose an algebraic model for turbulent scalar-flux vector that stems from tensor representation theory. The resulting closure contains direct dependence on mean velocity gradients and quadratic products of the Reynolds stress tensor. Model coefficients are determined from Direct Numerical Simulations (DNS) data of homogeneous shear flows subjected to arbitrary mean scalar gradient orientations, while a correction function was applied at one model coefficient based on a turbulent channel flow case. Model performance is evaluated in Poiseuille and Couette flows at several Reynolds numbers for
【 授权许可】
Unknown