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We present an experimental investigation of the flow structure and vorticity field in the wake of a NACA-0012 airfoil pitching sinusoidally at small amplitude and high reduced frequencies. Molecular tagging velocimetry is used to quantify the characteristics of the vortex array (circulation, peak vorticity, core size, spatial arrangement) and its downstream(More)
The characteristics of the axial flow within the core of a concentrated line vortex are investigated using molecular tagging velocimetry (MTV). A well-defined array of isolated vortices of alternating sign is generated in the wake of a NACA-0012 airfoil pitching sinusoidally at small amplitude and high reduced frequencies. The circulation and peak vorticity(More)
In this paper, we investigate the transport and mixing process of the batch mixers with two different configurations, the centered-blade and offset-blade mixers, by using a dynamical system approach. The 2-D velocity fields of the mixers measured using Particle Image Velocimetry (PIV) are used to identify the Lagrangian coherent structures (LCSs). The(More)
Characterization of Mixing in a Simple Paddle Mixer Using Experimentally Derived Velocity Fields Douglas Bohl 1 , Naratip Santitissadeekorn, Akshey Mehta 1 , and Erik Bollt 1 Department of Mechanical and Aeronautical Engineering 2 Department of Mathematics Clarkson University Potsdam, NY Abstract The flow field in a cylindrical container driven by a flat(More)
  • D. Bohl, Gregory Jackson
  • Journal of hazardous materials
  • 2007
Pool and vapor cloud characteristics of an acetone spill issuing from the downstream wall of a flow obstruction oriented perpendicular to a uniform flow were investigated experimentally. Data indicate that the spill event was largely governed by the temperature of the surface in relation to the boiling point of the spilled liquid. The free stream velocity(More)
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