TY - JOUR
T1 - Evaluation of a film-based wall shear stress measurement technique in a turbulent channel flow
AU - Amili, Omid
AU - Hind, Michael D.
AU - Naughton, Jonathan W.
AU - Soria, Julio
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Mean wall shear stress in a turbulent channel flow has been measured using a film-based shear stress sensor with a working principle based on the deformation of a thin elastic film. A direct comparison was made between the elastic film measurements and those using oil-film interferometry in the same experimental facility to evaluate the capability of the novel technique to measure the mean wall shear stress. The results indicate that the film-based sensor measures the wall shear stress within the uncertainty of the oil film measurement for the range of Reynolds numbers considered here, i.e. 2100-2900 based on the friction velocity and the half channel height.
AB - Mean wall shear stress in a turbulent channel flow has been measured using a film-based shear stress sensor with a working principle based on the deformation of a thin elastic film. A direct comparison was made between the elastic film measurements and those using oil-film interferometry in the same experimental facility to evaluate the capability of the novel technique to measure the mean wall shear stress. The results indicate that the film-based sensor measures the wall shear stress within the uncertainty of the oil film measurement for the range of Reynolds numbers considered here, i.e. 2100-2900 based on the friction velocity and the half channel height.
KW - Film-based shear stress sensor
KW - Mean wall shear stress
KW - Oil-film interferometry
KW - Turbulent channel flow
UR - http://www.scopus.com/inward/record.url?scp=84945290101&partnerID=8YFLogxK
U2 - 10.1016/j.expthermflusci.2015.09.027
DO - 10.1016/j.expthermflusci.2015.09.027
M3 - Article
AN - SCOPUS:84945290101
SN - 0894-1777
VL - 70
SP - 437
EP - 442
JO - Experimental Thermal and Fluid Science
JF - Experimental Thermal and Fluid Science
ER -