Abstract
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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 437-442 |
| Number of pages | 6 |
| Journal | Experimental Thermal and Fluid Science |
| Volume | 70 |
| DOIs | |
| State | Published - Jan 1 2016 |
Bibliographical note
Funding Information:The financial support to conduct this research by the Australian Research Council is gratefully acknowledged.
Publisher Copyright:
© 2015 Elsevier Inc.
Keywords
- Film-based shear stress sensor
- Mean wall shear stress
- Oil-film interferometry
- Turbulent channel flow