Abstract

The development of a method for the measurement of small flow velocities and the application of this method to the measurement of free convection velocity profiles in air is described. The method employed uses photographic techniques to measure the trajectories of small dust particles ( d < 6-6 μ) carried along with the flow. Factors affecting the measurement technique and the results of the measurement of two laminar free convection velocity profiles on a vertical flat plate are presented.

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