Turbulent flows over rough walls

By Javier Jiménez. 2004

1,627 citations recorded by the source corpus.

Subfields: Computational Mechanics, Global and Planetary Change, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/a4c953c9b893b53c1dd880540a3f984b6f039077

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In Computational Mechanics

In Global and Planetary Change

In Mechanical Engineering

Citations in the corpus

Effects of spanwise spacing on large-scale secondary flows in rough-wall turbulent boundary layers (2015, background): “Surface roughness can have a dramatic effect on the dynamics of turbulent boundary layers (Jiménez 2004; Flack & Schultz 2014).”
Effect of wall-boundary disturbances on turbulent channel flows (2006, methodology): “Direct numerical simulations (DNS) of non-physical flow configurations have been very useful in the study of inner-outer interactions, such as in the autonomous channel of Jiménez, del Álamo & Flores (2004). From this point of view, the study of rough-walled flows can be understood as the study of a”
Large-Eddy Simulations on the Effects of Surface Geometry of Building Arrays on Turbulent Organized Structures (2004, background): “Jimenez (2004) reviewed the experimental evidence on turbulent flows over rough walls, and suggested that the ratio of the boundary-layer thickness δ to the roughness height h largely determines whether or not a”
Hydrodynamic stability and breakdown of the viscous regime over riblets (2011, background): “For even larger riblets, the reduction ultimately becomes a drag increase and follows a typical k -roughness behaviour (Jiménez 2004).”
Aerodynamic Parameters of Regular Arrays of Rectangular Blocks with Various Geometries (2009, background): “The ratio of the boundary-layer height to the average height of the canopy δ/h was 5 to 8. Such a relatively small δ/h implies that the effect of roughness extends across the whole boundary layer ( Jimenez 2004 ).”
Superhydrophobic turbulent drag reduction as a function of surface grating parameters (2014, background): “Surface roughness generally increases the skin-friction drag in turbulent boundary layer (TBL) flows (Jiménez 2004) except for very few specific conditions (Walsh 1982).”
Cascades in Wall-Bounded Turbulence (2012, background): “…the buffer layer, as shown by experiments in which the latter is disorganized without any clear effect on the former (Flores et al. 2007), and by the relative independence of the logarithmic layer from wall roughness, reviewed by Jiménez (2004) and more recently confirmed by Volino et al. (2007).”
Direct numerical simulation of the turbulent boundary layer over a rod-roughened wall (2007, background): “Previous studies on the effect of surface roughness on a TBL are reviewed well by Raupach, Antonia & Rajagopalan (1991) and Jimenez (2004). These reviews support the wall similarity hypothesis of Townsend (1976), which states that outside the roughness sublayer turbulent motions are independent of t”
The effect of the slope of irregularly distributed roughness elements on turbulent wall-bounded flows (2008, background): “This behaviour is in agreement with the literature results for regular roughness geometry (as reported in Jimenez 2004), which showed the decrease of the roughness function beyond a certain value of solidity. Note that the decrease of U beyond the maximum value obtained in our simulations is much sm”
Turbulence structure in a boundary layer with two-dimensional roughness (2009, methodology): “variation may explain the lesser effect of roughness observed by Keirsbulck et al. (2002), who used a smaller spacing. Lee & Sung (2007) conducted a DNS for a turbulent boundary layer over a wall with two-dimensional disturbances. The disturbances modelled two-dimensional transverse square bars with”
An experimental and numerical study of channel flow with rough walls (2005, methodology): “With the computer resources available this h/k ratio was the closest to the recommendations of Jimenez (2004) that could be obtained. A pitch-to-height ratio of p/k =8 was chosen because it is known to cause the largest effect (i.e. shift U) on the mean velocity profile (1.2) according to the bounda”
Rough-wall boundary layers: mean flow universality (2007, background): “As noted by Jiménez (2004), one might then more profitably consider the situation as that of a uniform flow over a collection of discrete bluff bodies, rather than an identifiable two-dimensional boundary layer, and it is probably not sensible to expect any kind of universality.”
Mean Flow and Turbulence Statistics Over Groups of Urban-like Cubical Obstacles (2006, background): “However, the dynamics of turbulent boundary layers over rough surfaces is much less well known, as emphasised in the recent review by Jimenez (2004) .”
The rough-wall turbulent boundary layer from the hydraulically smooth to the fully rough regime (2006, background): “However, Jiménez (2004) notes that the classical notion of wall similarity has implications far beyond roughness studies, extending to the fundamental concepts of turbulence modelling.”
Exponential roughness layer and analytical model for turbulent boundary layer flow over rectangular-prism roughness elements (2016, methodology): “While typically the wake interactions are not explicitly modelled, there have been some attempts (e.g. Jiménez 2004; Millward-Hopkins et al. 2011) to model the mutual sheltering between roughness elements.”
Turbulent boundary layers over permeable walls: scaling and near-wall structure (2011, methodology): “Jimenez (2004) pointed out that outer-layer similarity fails if the ratio between boundary layer thickness and roughness size is too small.”