Abstract
By extending the “classical” single camera PIV implementation with a second camera the planar light sheet can be imaged stereoscopically from two directions allowing the recovery of the velocity vector normal to the light sheet. This chapter on stereo-PIV introduces two primary implementations of stereoscopic imaging along with the concept of Scheimpflug imaging of obliquely viewed light sheet planes. The stereoscopic reconstruction can follow a variety of approaches but collectively rely on some sort of calibration to recover 3-C velocity data from two separate 2-C vector maps. The error introduced through camera misalignment is discussed along with possible mitigation strategies. The application of the stereo-PIV technique in environments with index-of-refraction changes such as in water facilities requires specific imaging arrangements. The chapter closes with a list of recommendations for successful implementation of the stereo-PIV technique.
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Raffel, M., Willert, C.E., Scarano, F., Kähler, C.J., Wereley, S.T., Kompenhans, J. (2018). Stereoscopic PIV. In: Particle Image Velocimetry. Springer, Cham. https://doi.org/10.1007/978-3-319-68852-7_8
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