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作者:Sedat Tardu , Frédéric Bauer
来源:[J].Computers and Fluids(IF 1.467), 2017, Vol.148, pp.82-102
摘要:... Such statistics have already been used in the turbulence community, but not always adequately. Special care is indeed needed to correctly define these statistics in order to avoid biasing effects. The first part of this paper is devoted to the analysis of these peculiari...
作者:E. De Angelis , C.M. Casciola , R. Piva
来源:[J].Computers and Fluids(IF 1.467), 2002, Vol.31 (4), pp.495-507
摘要:Abstract(#br)Several studies, both numerical and experimental, have shown that the introduction of a small amount of long chain polymers in a turbulent flow alters dramatically the length and time scales which are typical of Newtonian fluids, even though turbulence self-sustainin...
作者:Sedat F. Tardu , Olivier Doche
来源:[J].Computers and Fluids(IF 1.467), 2008, Vol.38 (3), pp.637-647
摘要:Abstract(#br)The suboptimal control with the cost function directly connected to the wall shear and introduced for a while has been revisited through direct numerical simulations of high temporal and spatial resolution. Its effect on the fine structure of the wall turbulence has ...
作者:Diogo Queiros-Conde , Johan Carlier , Lavinia Grosu ...
来源:[J].Entropy(IF 1.347), 2015, Vol.17 (4), pp.2198-2217
摘要:In order to describe the phenomenon of intermittency in wall turbulence and, more particularly, the behaviour of moments and and intermittency exponents ζP with the order p and distance to the wall, we developed a new geometrical framework called “entropic-skins geometry”...
作者:Takashi Ohta , Masahito Miyashita
来源:[J].Journal of Non-Newtonian Fluid Mechanics(IF 1.567), 2014, Vol.206, pp.29-39
摘要:Abstract(#br)To develop better computer modeling methods for wall turbulence in non-Newtonian viscous fluids, we performed direct numerical simulations (DNS) and large eddy simulations (LES) of turbulent channel flow of various non-Newtonian fluids, with viscosity described by th...
作者:Klewicki J. C. , Chini G. P. , Gibson J. F.
来源:[J].Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences(IF 2.891), 2017, Vol.375 (2089), pp.20160092-20160092
摘要:Recent and on-going advances in mathematical methods and analysis techniques, coupled with the experimental and computational capacity to capture detailed flow structure at increasingly large Reynolds numbers, afford an unprecedented opportunity to develop realistic models of high Reynolds number turbulent wall...
作者:C.A. Gómez-Pérez , J. Espinosa , L.C. Montenegro Ruiz ...
来源:[J].Algal Research, 2015, Vol.12, pp.1-9
摘要:... In this work, we investigate by CFD simulation the effect of wall turbulence promoters, i.e. profiles at the inner tube wall, at low flow velocities (0.1–0.3 m/s). The use of these wall turbulence promoters is compared to the mixing behaviour in standard tubular PBRs at ...
作者:Kaoru Iwamoto , Yuji Suzuki , Nobuhide Kasagi
来源:[J].International Journal of Heat and Fluid Flow(IF 1.581), 2002, Vol.23 (5), pp.678-689
摘要:... It is found, through the Karhunen–Loeve (KL) decomposition of turbulent fluctuations, that the KL modes at 15< y + <30, which correspond to longitudinal vortices and near-wall streaky structures, play a dominant role in the production of turbulence and wall shear stress a...
作者:Ivan Marusic , Romain Mathis , Nicholas Hutchins
来源:[J].International Journal of Heat and Fluid Flow(IF 1.581), 2010, Vol.31 (3), pp.418-428
摘要:... The emergent regime of very large-scale structures in the logarithmic region and their subsequent influence on the near-wall cycle challenges many of the previously held assumptions regarding scaling of turbulent boundary layers at high Reynolds numbers. Experimental results ...
作者:Sharma A. S. , Moarref R. , McKeon B. J.
来源:[J].Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences(IF 2.891), 2017, Vol.375 (2089), pp.20160089-20160089
摘要:... The orthogonal modes provided by the resolvent analysis describe the wall-normal coherence of the motions and inherit that self-similarity. In this contribution, we present the implications of this similarity for the nonlinear interaction between modes with different scale...

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