MICHIGAN UNIV ANN ARBOR DEPT OF ENGINEERING MECHANICS
Shadowgraphs were made of the flow past a sphere in water that was vertically stratified with sodium chloride. The intent was to explore the flow patterns at low Reynolds numbers with particular emphasis on any asymmetries due to the stratification. The shadowgraphs recorded three-dimensional phenomena and the visualization was in agreement with that obtained with dye inserted at the sphere. Thus the optical technique is useful even though the lack of two- dimensionality prohibits the drawing of any quantitative conclusions.