The engine behind (wall) turbulence: perspectives on scale interactions
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2017.115
Abstract: Known structures and self-sustaining mechanisms of wall turbulence are reviewed and explored in the context of the scale interactions implied by the nonlinear advective term in the Navier–Stokes equations. The viewpoint is shaped by the… read more here.
Keywords: turbulence; wall turbulence; behind wall; scale interactions ... See more keywords
Shear stress-driven flow: the state space of near-wall turbulence as $Re_{\unicode[STIX]{x1D70F}}\rightarrow \infty$
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2019.472
Abstract: An inner-scaled, shear stress-driven flow is considered as a model of independent near-wall turbulence as the friction Reynolds number $Re_{\unicode[STIX]{x1D70F}}\rightarrow \infty$ . In this limit, the model is applicable to the near-wall region and the… read more here.
Keywords: stress driven; near wall; shear stress; wall turbulence ... See more keywords
Unlikely existence of kx−1 spectral law in wall turbulence: An observation of the atmospheric surface layer
Sign Up to like & getrecommendations! Published in 2019 at "Physics of Fluids"
DOI: 10.1063/1.5063545
Abstract: For wall turbulence, a range of streamwise wavenumbers kx has been predicted such that the spectral density of streamwise velocity fluctuations is proportional to kx−1. The existence or nonexistence of this kx−1 law is examined… read more here.
Keywords: law; turbulence; surface layer; wall turbulence ... See more keywords
Streak instability in near-wall turbulence revisited
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Turbulence"
DOI: 10.1080/14685248.2017.1294757
Abstract: ABSTRACT The regeneration cycle of streaks and streamwise vortices plays a central role in the sustainment of near-wall turbulence. In particular, the streak breakdown phase in the regeneration cycle is the core process in the… read more here.
Keywords: near wall; turbulence; streak instability; wall turbulence ... See more keywords
The control of near-wall turbulence through surface texturing
Sign Up to like & getrecommendations! Published in 2019 at "Fluid Dynamics Research"
DOI: 10.1088/1873-7005/aadfcc
Abstract: Certain surfaces that exhibit small textured features can interact with near-wall turbulence and reduce drag, which is of great interest to industries in the aerospace, naval, transport and energy sectors. This paper reviews and discusses… read more here.
Keywords: turbulence surface; wall turbulence; control near; turbulence ... See more keywords
A statistical state dynamics approach to wall turbulence
Sign Up to like & getrecommendations! Published in 2017 at "Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences"
DOI: 10.1098/rsta.2016.0081
Abstract: This paper reviews results obtained using statistical state dynamics (SSD) that demonstrate the benefits of adopting this perspective for understanding turbulence in wall-bounded shear flows. The SSD approach used in this work employs a second-order… read more here.
Keywords: mean flow; statistical state; turbulence; streamwise ... See more keywords