Researchers at GW have invented a novel method to measure wall-shear-stress (WSS) by means of an optical probe. The novel device on which the method may be implemented is highly compact and can this be deployed in situ when taking into account, spatial considerations on an industrial scale. This also translates to the device being cost-effective. A salient aspect of the invention is that it can measure directly and with rapidity, WSS at both high spatial and temporal resolutions in comparison to extant approaches and devices. Finally, the invention is non-intrusive and can be integrated into other associated systems.
The disclosed approach can include: (i) utilizing a non-intrusive integral microscopic velocimetry (IMV) for resolving flows of interest; (ii) and utilizing computational imaging for the reconstruction of scenes from acquired images. The device disclosed utilizes a number of components including various light sources and micro lens arrays. The device can be used with molecular tagging velocimetry (MTV) or particle image velocimetry (PIV) to resolve the near-wall flow motion at an unprecedented spatio-temporal resolution.
Fig. 1 – Schematic Diagram of IMV Implementation.
Applications:
- Diagnostic needs in naval and aerospace hydrodynamics
Advantages:
- Compactness of the measurement device
- Rapid measurement of WSS
- Direct measurement of WSS at both high spatial and temporal resolutions
- In situ deployment of the measurement device
- Non-intrusive and integral
