@Article{cmes.2020.011835,
AUTHOR = {Jingfa Li, Bo Yu, Qianqian Shao, Dongliang Sun},
TITLE = {LES Investigation of Drag-Reducing Mechanism of Turbulent Channel Flow with Surfactant Additives},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {125},
YEAR = {2020},
NUMBER = {2},
PAGES = {541--563},
URL = {http://www.techscience.com/CMES/v125n2/40308},
ISSN = {1526-1506},
ABSTRACT = {In this work, the drag-reducing mechanism of high-Reynoldsnumber turbulent channel flow with surfactant additives is investigated by
using large eddy simulation (LES) method. An N-parallel finitely extensible
nonlinear elastic model with Peterlin’s approximation (FENE-P) is used to
describe the rheological behaviors of non-Newtonian fluid with surfactant.
To close the filtered LES equations, a hybrid subgrid scale (SGS) model
coupling the spatial filter and temporal filter is applied to compute the subgrid
stress and other subfilter terms. The finite difference method and projection
algorithm are adopted to solve the LES governing equations. To validate
the correctness of our LES method and in-house code, the particle image
velocimetry (PIV) experiment is carried out and representative measured
results are compared with LES results in detail. Then the flow characteristics and drag-reducing mechanism of turbulent channel flow with surfactant
are investigated from the perspective of drag reduction rate, mean velocity,
fluctuation of deformation rate, shear stress, transport and dissipation of
turbulent kinetic energy, and turbulent coherent structures. This research can
shed a light on the application of turbulent drag reduction technique in district
heating, petroleum transport, etc.},
DOI = {10.32604/cmes.2020.011835}
}