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Sun, L., Zhou, X., Mahalingam, S. and Weise, D.R., 2005. Experimental Investigation Of The Velocity Field In Buoyant Diffusion Flames Using PIV And TPIV Algorithm. Fire Safety Science 8: 939-950. doi:10.3801/IAFSS.FSS.8-939
We investigated a simultaneous temporally and spatially resolved 2-D velocity field above a burning circular pan of alcohol using particle image velocimetry (PIV). The results obtained from PIV were used to assess a thermal particle image velocimetry (TPIV) algorithm previously developed to approximate the velocity field using the temperature field, simultaneously captured by an infrared (IR) thermal camera. By tracing â€œthermal particles,â€ which were assumed to be virtual particles that corresponded to pixels of temperature values in successive IR images, the TPIV algorithm estimated a larger scale instantaneous velocity field than either a single-point velocity measurement (e.g., LDV) or the area velocity measurement such as PIV. Instantaneous velocity fields obtained from both methods are presented. Time series vertical velocity profiles and time-averaged velocity vector fields are compared. The comparison demonstrates the applicability and performance of the TPIV algorithm in wildfire research.
piv, velocity, temperature, ir
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