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|Title:||Dynamic response of a hot-wire anemometer. Part II: A flush-mounted hot-wire and hot-film probes for wall shear stress measurements|
|Authors:||Chew, Y.T. |
|Source:||Chew, Y.T.,Khoo, B.C.,Lim, C.P.,Teo, C.J. (1998-05). Dynamic response of a hot-wire anemometer. Part II: A flush-mounted hot-wire and hot-film probes for wall shear stress measurements. Measurement Science and Technology 9 (5) : 764-778. ScholarBank@NUS Repository. https://doi.org/5/006|
|Abstract:||The present study continues the work described in Part I of this paper in utilizing a specifically designed apparatus for generating a known near-wall fluctuating flow field for the purpose of quantifying the dynamic response of a flush-mounted hot-element wall shear stress gauge. Two different types of wall shear stress gauges were tested: a flush-mounted hot wire in contact with the wall substrate and commercially available quartz substrate hot-film gauges with different thicknesses of quartz coating. It is found that the flush-mounted hot-wire gauge has a much higher dynamic response than the quartz substrate gauges, although it is still lower than the marginally elevated hot-wire configuration. This may suggest the possible use of a marginally elevated hot wire as a wall shear shress gauge to ensure sufficient responsiveness for time-resolved wall shear stress measurements.|
|Source Title:||Measurement Science and Technology|
|Appears in Collections:||Staff Publications|
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