Imperial College London
Portrait Picture

Dr. Oliver Buxton

Faculty of Engineering, Department of Aeronautics

Reader in Experimental Fluid Mechanics
 
 
 
//

Contact

 

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

 
 
//

Location

 

213City and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Rodríguez-López:2017:10.1080/14685248.2016.1277734,
author = {Rodríguez-López, E and Bruce, PJK and Buxton, ORH},
doi = {10.1080/14685248.2016.1277734},
journal = {Journal of Turbulence},
pages = {271--290},
title = {Experimental measurement of wall shear stress in strongly disrupted flows},
url = {http://dx.doi.org/10.1080/14685248.2016.1277734},
volume = {18},
year = {2017}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Mean and fluctuating wall shear stress is measured in strongly disrupted cases generated by various low-porosity wall-mounted single- and multi-scale fences. These grids generate a highly turbulent wake which interacts with the wall-bounded flow modifying the wall shear stress properties. Measurement methods are validated first against a naturally growing zero pressure gradient turbulent boundary layer showing accuracies of 1% and 4% for extrapolation and direct measurement of the mean shear stress respectively. Uncertainty associated with the root mean square level of the fluctuations is better than 2% making it possible to measure small variations originating from the different fences. Additionally, probability density functions and spectra are also measured providing further insight into the flow physics. Measurement of shear stress in the disrupted cases (grid+TBL) suggest that the flow characteristics and turbulence mechanisms remain unaltered far from the grid even in the most disrupted cases. However, a different root mean square level of the fluctuations is found for different grids. Study of the probability density functions seem to imply that there are different degrees of interaction between the inner and outer regions of the flow.
AU  - Rodríguez-López,E
AU  - Bruce,PJK
AU  - Buxton,ORH
DO  - 10.1080/14685248.2016.1277734
EP  - 290
PY  - 2017///
SN  - 1468-5248
SP  - 271
TI  - Experimental measurement of wall shear stress in strongly disrupted flows
T2  - Journal of Turbulence
UR  - http://dx.doi.org/10.1080/14685248.2016.1277734
UR  - http://hdl.handle.net/10044/1/44629
VL  - 18
ER  -
Download