Applied Optics · 1983 · 166 citations · 6 references
ComputingVisualizationFlow VisualizationFluid DynamicsPhotographyFlow MeasurementFlow MetrologyOptical FlowUnsteady Flow VisualizationExperimental Unsteady Flow MeasurementFlow Pattern AnalysisFlow Velocity MeasurementsUnsteady FlowUnsteady Flow Dynamics
An application of speckle photography techniques to unsteady gas flow measurements is presented. The instrumentation developed for the analysis of double-exposure photographs by digital signal processing is described. It is shown that 2-D velocity fields can be measured even when the flow is not perfectly 2-D. Accuracy and limitations of these techniques are discussed.
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