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|Title:||Response of flush-mounted hot-wire and hot-film wall shear stress probes|
|Authors:||Chew, Y.T. |
|Source:||Chew, Y.T.,Khoo, B.C.,Lim, C.P. (1997). Response of flush-mounted hot-wire and hot-film wall shear stress probes. American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED 12 : -. ScholarBank@NUS Repository.|
|Abstract:||The present study continues the preliminary work of Khoo et al (1997) using the apparatus designed for generating a known near-wall fluctuating flow field to quantify the dynamic response of a flush-mounted hot-element wall shear stress gauge. Two different types of wall shear stress gauges were used in our experiment: a flush-mounted hot-wire in contact with the wall substrate and commercially-available quartz substrate hot-film gauges with different thickness of quartz coating. The flush-mounted hot-wire gauge was found to have a much higher dynamic response compared to 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 stress gauge to ensure sufficient responsiveness for time-resolved wall shear stress measurements.|
|Source Title:||American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED|
|Appears in Collections:||Staff Publications|
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