Convective flow measurements in a heated cavity using pulsed laser velocimetry with digital image processing
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A new approach in measuring velocities of convective flows in a heated cavity is implemented. A pulsed laser emits a beam of light that is optically shaped into a planar sheet of light through a series of plano-convex cylindrical lenses. This sheet of light illuminates a region of a seeded, liquid-filled, heated cavity. The neutrally buoyant seeds scatter the incoming light to a high-resolution digital camera. Ten picture frames of this region are obtained by direct digitization at 150 milliseconds apart. Two automatic tracking algorithms are used to obtain and verify velocity profiles throughout the region. Plots of flow paths and instantaneous velocities with attached data give both qualitative and quantitative information describing some of the characteristics of convective flows in the heated cavity.
author list (cited authors)
Hassan, Y. A., Chavez, H. L., & Blanchat, T. K.