This video depicts flow between soil particles . The transparent soil grains used represents sand. Water is seeded with silver-coated micron-sized particles. The original images (LHS) are captured using an NAC HX5 high-speed camera . Flow characteristics shown on RHS are obtained using particle image velocimetry (aka. PIV). 467 images were employed to produce this video.
Digital Image Correlation analysis results of a cone projectile penetrating into transparent soil (Initial Velocity = 13m/s). The analysis was performed using MAGICgeo software available for download from MAGICgeo website hosted at wp.nyu.edu/MAGICgeo.
This video presents a method for predicting positions of color cubes inside a square transparent solid object from images taken at the orthogonal boundary surfaces. The work is developed for use in mapping flow of non-aqueous phase liquids (NAPL) in transparent soils. Transparent soil models have been developed to study the flow of contaminants through porous media, in bench scale tests. Yellow transparent cubes are used to represent NAPL plumes and clear transparent cubes are used as representations of transparent soil in order to definitively validate the algorithm. Color space information is used to relate concentration and image intensity. The new algorithm employs a so-called 3D carving method to iteratively reconstruct a 3D model using images taken at three orthogonal boundaries. The methodology presented in this paper is a fast, relatively accurate, non-intrusive and inexpensive method for quantifying NAPL zones in transparent soil models.
A transparent sand surrogate was employed along with high-speed imagery to un-intrusively visualize the penetration of a spherical projectile into the middle of a saturated granular target, representing angular sand, at speeds ranging between 60 and 150 m/sec. The transparent sand was made by saturating an angular fused quartz waste product with a matched refractive index pore fluid made of sucrose. A distinct zone of opacity was observed travelling ahead of the projectile. Some healing was also observed with time and some increase in transparency was observed. Some of the opacity is attributed to dilatency of the fused quatz during penetration, and healing is attributed to flow of pore fluid into the dilated zone.
This video depicts penetration of a torpedo anchor into a physical model made of transparent fused quartz, representing natural sand. Fore more information, please visit the transparent soil wiki hosted at wp.nyu.edu/ts
This video depicts penetration of a torpedo anchor into a physical model made of transparent fused quartz, representing natural sand. Digital Image Correlation of successive images from this video are depicted in https://www.youtube.com/watch?v=6hWzS… Fore more information, please visit the transparent soil wiki hosted at wp.nyu.edu/ts
This video depicts penetration of a torpedo anchor into a physical model made of transparent fused quartz, representing natural sand. In this video, laser illumination is used to identify the plane of measurement. Fore more information, please visit the transparent soil wiki hosted at wp.nyu.edu/ts
