Abstract: Three-dimensional (3D) microscopic velocimetry methods have been increasingly developed in recent years to meet the measurement demands of microfluidic systems. As all 3D microscopic velocimetry techniques involve reconstructing a volume from two-dimensional (2D) sensor(s), sources of uncertainty arise that are unique from 2D velocimetry methods. This study discusses the error sources associated with a [...]

Abstract: Over the past two years several professors from the technology education and mechanical engineering programs at Brigham Young University have collaborated with local public k-12 teachers to develop and implement a ROV (Remotely Operated Vehicle) activity to promote STEM (Science, Technology, Engineering, and Mathematics). The activity has focused on students learning about STEM concepts [...]

Abstract: Light field imaging is becoming an increasingly useful tool for measuring fluid mechanical systems. We present advances in light field imaging for fluids along three directions. The first concerns robust reconstruction of fluid measurement volumes using synthetic aperture refocusing followed by deconvolution. Then, we discuss how a flame, which distorts the refractive index, augments [...]

Abstract: This research seeks to model and elucidate the physics of water impact of elastomeric spheres, including the mechanisms by which severe deformations enable spheres to skip off the free water surface. The interplay between solid mechanics and fluid mechanics, or fluid-structure interaction, is extremely rich and complicated for this physical phenomenon. This research [...]

Abstract: Synthetic aperture particle image velocimetry is used with an excised human vocal fold model to study the airflow between the vocal folds during voice production. A whole field, time-resolved, 3D description of the flow is presented over multiple cycles of vocal fold oscillations. The 3D flow data are synchronized with a 3D reconstruction [...]

Citation: Nielson, J.R., Truscott, T.T., Daily, D.J., Luegmair, G., Dollinger, M. & Thomson, S.L., “Whole-Field 3d Characterization Of The Glottal Jet Using Synthetic Aperture Particle Image Velocimetry.” ICVPB, 2012.

Abstract: In this study synthetic aperture particle image velocimetry is used on an excised human vocal fold model to study the airflow over the vocal folds during voice production. For the first time, a whole-field, time-resolved, 3D description of the flow is presented over one cycle of vocal fold oscillation. Complex, unsteady, 3D flow [...]

Abstract: It is well known that one can skip a stone across the water surface, but less well known that a ball can also be skipped on water. The Waboba® is an elastic ball used in a game of aquatic keep away in which players pass the ball by skipping it along the water. We [...]

Abstract: Three-dimensional multiphase fluid flows demand advanced and innovative measurement systems in order to fully resolve the flow physics. Dense bubbly multiphase flows cannot be readily imaged by traditional, non-invasive flow measurement techniques due to the bubbles occluding optical access to the interior regions of the volume of interest. We present a novel technique [...]

Abstract: Instantaneous derivatives of high-precision experimental data can be evaluated by fitting the data with a smoothing spline. This paper presents a novel and robust method for choosing the best spline fit and, hence, the best prediction of the derivatives. Typically, a smoothing spline is fit by choosing the value of a smoothing parameter that [...]