Abstract: An experimental investigation of the trajectories, forces and cavity formation behind spinning hydrophobic and hydrophilic spheres is presented. Several cases are also presented for non-spinning spheres which are half hydrophobic and half hydrophilic. Data from high speed imaging are processed using advanced data techniques to gain accurate position, velocity and acceleration [...]
Abstract: We present a new method for resolving three-dimensional (3D) fluid velocity fields using a technique called synthetic aperture particle image velocimetry (SAPIV). By fusing methods from the imaging community pertaining to light field imaging with concepts that drive experimental fluid mechanics, SAPIV overcomes many of the inherent challenges of 3D particle image velocimetry [...]
Abstract: Not available. Citation and Link: La Foy, R.R., Belden, J., Truscott, T.T., Shih, A.M. & Techet, A.H., Oil droplet in alcohol, Physics of Fluids, 22, 032102, DOI: 10.1063/1.3483217, September 2010.
Abstract: We present the results of a combined experimental and theoretical investigation of the vertical impact of low-density spheres on a watersurface. Particular attention is given to characterizing the sphere dynamics and the influence of its deceleration on the shape of the resulting air cavity. A theoretical model is developed which yields [...]
Abstract: Surface coating and impact velocity can dramatically affect cavity formation during water entry of spheres. Duez et al. [Nat. Phys.3, 180 (2007)] present a theoretical limit, dependent on impact velocity and surfacestaticwetting angle, below which air cavities no longer form. We show that transverse spin alters the spheres surface velocity distribution to straddle [...]
Abstract: The complex hydrodynamics of water entry by a spinning sphere are investigated experimentally for low Froude numbers. Standard billiard balls are shot down at the free surface with controlled spin around one horizontal axis. High-speed digital video sequences reveal unique hydrodynamic phenomena which vary with spin rate and impact velocity. As [...]
Abstract: Not Available Citation and Link: Aristoff, J.M., Truscott, T.T., Techet, A.H. & Bush, J.W.M., The Water-entry cavity formed by low bond number impacts. Physics of Fluids 20, 091111, DOI:10.1063/1.2973662, September 2008.
Abstract: Not Available Citation and Link: Truscott, T.T. & Techet, A.H., Cavity formation in the wake of a spinning sphere impacting the free surface. Physics of Fluids 18, 091113, DOI: 10.1063/1.2335903, September 2006.
At this years FloCon (Utah Fluids Conference) I put together a short workshop on stereo imaging and 3d imaging from structured light. Most of these tools are readily available on the web and Matlab even has dedicated libraries in the 2015 Computer Vision System Toolbox! I am putting a few of the resources from that workshop [...]
We are excited to announce that Dr. Truscott is a 2015 Office of Naval Research Recipient! The award is linked the work entitled Natural swarms and crowds: Observation and Modeling. This grant allows the Splash Lab to do utilize our 3D imaging techniques to unravel behaviors of swarms and swarming behavior of animals and humans. We [...]