Model-Based Recovery of Fluid-Flow Parameters from Video

Relevant Papers:
1. V. Korzhova, D. Goldgof, G. Sisoev, ”Model-based Recovery of Fluid Flow Parameters from Video”
International Journal of Pattern Recognition and Artificial Intelligence, vol. 25(3), pp. 309-336, 2011.
link: Model-based Recovery of Fluid Flow Parameters from Video
2. G. Sisoev, D. Goldgof, V. Korzhova ”Stationary spiral waves in film flow over a spinning disk,” Physics
of Fluids, vol. 22(5), pp. 052106-1-6, 2010.
link: Stationary spiral waves in film flow over a spinning disk

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Model-Based Recovery of Fluid-Flow Parameters from Video
Understanding atmospheric dynamics, oceanographic streams, and cloud motion is of great importance for weather and climate forecast. The rotating flow has been used to study a variety of physical processes including geostrophic turbulence, baroclinic instability, convection and chaos. The flow of a liquid film over a rapidly rotating horizontal disk has numerous industrial and engineering applications, ranging from the spin-coating of silicon wafers to the atomization of liquids. It also has many applications in medical fields (for example, blood oxygenation). The spinning disk reactor exploits the benefits of centrifugal force, which produces thin, highly sheared films due to radial acceleration. The hydrodynamics of the film results in excellent fluid mixing and high heat or mass transfer rates. Different wave regimes of fluid flow have a strong influence on those processes, so it is important to control the formation of waves.

This paper suggests a new approach to track and analyze fluid flow using video data. The fluid flow parameters include wave velocities, wave inclination angles, and distances between consecutive waves. The average computed parameters are within 5-10% of the predicted values based on the Navier-Stokes equations. The results also show the speed of the disk and the flow rate, when compared to direct observation are recovered with the error less than 10%.