ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Partially exposed polymer dispersed liquid crystal thin film (10–25 μm) deposited on a flat glass substrate has been used for the first time to measure skin friction. Utilizing the shear stress induced director reorientation in the partially exposed liquid crystal droplets, optical transmission under crossed polarization has been measured as a function of the air flow differential pressure. Direct measurement of the skin friction with a skin friction drag balance, under the same aerodynamic conditions, lets us correlate the skin friction with optical transmission. This provides a unique technique for the direct measurement of skin friction from the transmitted light intensity. The results are in excellent agreement with the model suggested in this paper.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1144229
