Imperial College London
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Dr. Oliver Buxton

Faculty of Engineering, Department of Aeronautics

Reader in Experimental Fluid Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 5118o.buxton Website CV

 
 
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Location

 

213City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Rodriguez-Lopez:2016:10.1103/PhysRevFluids.1.074401,
author = {Rodriguez-Lopez, E and Bruce, P and Buxton, O},
doi = {10.1103/PhysRevFluids.1.074401},
journal = {Physical Review Fluids},
pages = {1--22},
title = {Near field development of artificially generated high Reynolds number turbulent boundary layers},
url = {http://dx.doi.org/10.1103/PhysRevFluids.1.074401},
volume = {1},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Particle image velocimetry is conducted in the near field of two distinct wall-mounted trips for the artificial generation of a high Reynolds number turbulent boundary layer. The first of these trips consists of high aspect ratio obstacles, which are supposed to minimize the influence of their wakes on the near-wall region, contrasting with low aspect ratio trips, which would enhance this influence. A comprehensive study involving flow description, turbulent-nonturbulent interface detection, a low-order model description of the flow and an exploration of the influence of the wake in the near-wall region is conducted and two different mechanisms are clearly identified and described. First, high aspect ratio trips generate a wall-driven mechanism whose characteristics are a thinner, sharper, and less tortuous turbulent-nonturbulent interface and a reduced influence of the trips' wake in the near-wall region. Second, low aspect ratio trips generate a wake-driven mechanisms in which their turbulent-nonturbulent interface is thicker, less sharply defined, and with a higher tortuosity and the detached wake of the obstacles presents a significant influence on the near-wall region. Study of the low-order modeling of the flow field suggests that these two mechanisms may not be exclusive to the particular geometries tested in the present study but, on the contrary, can be explained based on the predominant flow features. In particular, the distinction of these two mechanisms can explain some of the trends that have appeared in the literature in the past decades.
AU  - Rodriguez-Lopez,E
AU  - Bruce,P
AU  - Buxton,O
DO  - 10.1103/PhysRevFluids.1.074401
EP  - 22
PY  - 2016///
SN  - 2469-990X
SP  - 1
TI  - Near field development of artificially generated high Reynolds number turbulent boundary layers
T2  - Physical Review Fluids
UR  - http://dx.doi.org/10.1103/PhysRevFluids.1.074401
UR  - http://hdl.handle.net/10044/1/42267
VL  - 1
ER  -
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