2018
DOI: 10.1007/s00348-018-2612-2
|View full text |Cite
|
Sign up to set email alerts
|

An alternative floating element design for skin-friction measurement of turbulent wall flows

Abstract: Indirect methods to estimate surface shear stress are commonly used to characterise rough-wall boundary-layer flows. The uncertainty is typically large and often insufficient to carry out quantitative analysis, especially for surface roughness where established scaling and similarity laws may not hold. It is, thus, preferable to rely instead on independent measurement techniques to accurately measure skin friction. The floating element was one of the first to be introduced, and still is the most popular for it… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

3
30
0

Year Published

2020
2020
2024
2024

Publication Types

Select...
5
1
1

Relationship

2
5

Authors

Journals

citations
Cited by 24 publications
(33 citation statements)
references
References 39 publications
3
30
0
Order By: Relevance
“…Note also that the root mean square errors in the skin-friction coefficient are consistent with the overall uncertainties reported previously by Ferreira et al. (2018) for the same floating-element drag balance. They determined the uncertainties in the skin-friction coefficient by comparing the results from the floating-element drag balance with those obtained through hot-wire measurements over a smooth wall.…”
Section: Resultssupporting
confidence: 90%
See 1 more Smart Citation
“…Note also that the root mean square errors in the skin-friction coefficient are consistent with the overall uncertainties reported previously by Ferreira et al. (2018) for the same floating-element drag balance. They determined the uncertainties in the skin-friction coefficient by comparing the results from the floating-element drag balance with those obtained through hot-wire measurements over a smooth wall.…”
Section: Resultssupporting
confidence: 90%
“…As stated in § 3.1, consistent with the uncertainty estimate in Ferreira et al. (2018), the uncertainties in the present wall-friction velocities are expected to be within for all the surface and flow conditions in the present study.…”
Section: Figure 16supporting
confidence: 92%
“…Wall shear stress is directly measured using the FE balance described in Ferreira et al (2018). Its design is based on the parallel-shift linkage, featuring dedicated pairs of bendingbeam transducers to monitor not only the streamwise load but also the induced pitching moment, as a means to decouple extraneous loads.…”
Section: Floating Elementmentioning
confidence: 99%
“…Pre-and post-calibrations were conducted for each configuration without notable discrepancies. The acquisition procedure and uncertainty analysis are detailed in Ferreira et al (2018).…”
Section: Floating Elementmentioning
confidence: 99%
“…Ref. [2] presents an alternative for the floating element technique with a custom build force transducer and data acquisition system. The authors directly measure the skin-friction friction coefficient ( ) trying to reduce the signal-noise ratio.…”
Section: A Direct Methodsmentioning
confidence: 99%