NDLI: Performance Prediction for Optical Wall Shear Stress Sensor Using Direct Numerical Simulation of Fluid Flow

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Shirai, Katsuaki Tsuru, Keisuke Obi, Shinnosuke
Copyright Year	2003
Abstract	We conducted a performance prediction for an optical wall shear stress sensor with using the velocity data of a direct numerical simulation. The Doppler signals were generated with respect to the path of tracer particles passing through the measurement volume. A signal processing technique was proposed to estimate the magnitude and yaw angle of local wall shear stress simultaneously from each Doppler signal. The simulated Doppler signals were processed with the technique, however the accuracy of estimating the yaw angle is not sufficient. In contrast, the estimated magnitude of wall shear stress showed a good agreement with the direct estimate from the DNS data if the yaw angle was accurately estimated. The measurement accuracy of the sensor mainly depends on estimating the yaw angle of each tracer particle. Another technique for detecting the yaw angle is needed for the accurate measurement of both the yaw angle and magnitude of local wall shear stress.
Sponsorship	Fluids Engineering Division
Starting Page	75
Ending Page	80
Page Count	6
File Format	PDF
ISBN	0791836975
DOI	10.1115/FEDSM2003-45597
e-ISBN	0791836738
Volume Number	Volume 2: Symposia, Parts A, B, and C
Conference Proceedings	ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
Language	English
Publisher Date	2003-07-06
Publisher Place	Honolulu, Hawaii, USA
Access Restriction	Subscribed
Subject Keyword	Computer simulation Fluid dynamics Particulate matter Shear stress Signal processing Sensors Signals Accuracy and precision Yaw
Content Type	Text
Resource Type	Article

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