Zobrazeno 1 - 10
of 109
pro vyhledávání: '"McKeon, B. J."'
Publikováno v:
Phys. Rev. Fluids 6, 084804 (2021)
The interaction between shear driven turbulence and stratification is a key process in a wide array of geophysical flows with spatio-temporal scales that span many orders of magnitude. A quick numerical model prediction based on external parameters o
Externí odkaz:
http://arxiv.org/abs/2101.11771
Previous work has established the usefulness of the resolvent operator that maps the terms nonlinear in the turbulent fluctuations to the fluctuations themselves. Further work has described the self-similarity of the resolvent arising from that of th
Externí odkaz:
http://arxiv.org/abs/1609.06890
This paper employs the theoretical framework developed by Luhar et al. (J. Fluid Mech., 768, 415-441) to consider the design of compliant walls for turbulent skin friction reduction. Specifically, the effects of simple spring-damper walls are contras
Externí odkaz:
http://arxiv.org/abs/1604.05386
Publikováno v:
J. Fluid Mech (2015), 769, pp. 687-722
This paper extends the resolvent formulation proposed by McKeon & Sharma (2010) to consider turbulence-compliant wall interactions. Under this formulation, the turbulent velocity field is expressed as a linear superposition of propagating modes, iden
Externí odkaz:
http://arxiv.org/abs/1411.6690
Publikováno v:
Phys. Fluids, 26: 051701, 2014
We combine resolvent-mode decomposition with techniques from convex optimization to optimally approximate velocity spectra in a turbulent channel. The velocity is expressed as a weighted sum of resolvent modes that are dynamically significant, non-em
Externí odkaz:
http://arxiv.org/abs/1401.6417
Autor:
Sharma, A S, McKeon, B J
Publikováno v:
J. Fl, Mech. (2013), 728, pp 196-238
A new theory of coherent structure in wall turbulence is presented. The theory is the first to predict packets of hairpin vortices and other structure in turbulence, and their dynamics, based on an analysis of the Navier-Stokes equations, under an as
Externí odkaz:
http://arxiv.org/abs/1301.7580
Publikováno v:
Physics of Fluids 23, 125105 (2011)
The problems of nonlinearity and high dimension have so far prevented a complete solution of the control of turbulent flow. Addressing the problem of nonlinearity, we propose a flow control strategy which ensures that the energy of any perturbation t
Externí odkaz:
http://arxiv.org/abs/1301.4948
The majority of practical flows, particularly those flows in applications of importance to transport, distribution and climate, are turbulent and as a result experience complex three-dimensional motion with increased drag compared with the smoother,
Externí odkaz:
http://arxiv.org/abs/1012.0426
Autor:
McKeon, B. J., Sharma, A. S.
Publikováno v:
J. Fluid Mech. (2010), vol. 658, pp. 336-382
A model-based description of the scaling and radial location of turbulent fluctuations in turbulent pipe flow is presented and used to illuminate the scaling behaviour of the very large scale motions. The model is derived by treating the nonlinearity
Externí odkaz:
http://arxiv.org/abs/1001.3100
Autor:
Chung, D., McKeon, B. J.
We investigate statistics of large-scale structures from large-eddy simulation (LES) of turbulent channel flow at friction Reynolds numbers $Re_\tau = 2 {\rm k}$ and $200 {\rm k}$. To properly capture the behaviour of large-scale structures, the chan
Externí odkaz:
http://arxiv.org/abs/1001.2915