There is some experimental evidence that the flow around a melting ice-cylinder with a large length-to -diameter ratio placed in a large tank of water may not be two-dimensional. The existence of such a three-dimensional flow and the nature of the flow have been experimentally investigated in the present study. Ice-cylinders with a length of 0.5 m and an initial diameter, in most tests, of 53 mm were used. These cylinders were formed from water that contained a small amount of food coloring. The cylinders were suspended horizontally in a large clear plexiglas tank containing water. As the ice cylinders melted, dyed water was released into the flow allowing the flow pattern near the cylinder to be observed. Test were undertaken with the temperature of the water in the tank near room temperature and with the temperature of this water near 4°C. In all cases, it was found that the plume flowing from the ice-cylinder was not a uniform colored sheet as it would be if the natural convective flow about the cylinder was two-dimensional. Instead, this flow was highly three-dimensional, consisting of a series of distinct vortices with axes in the direction of the plume flow. The nature of this flow and the effect of the water temperature on it have been studied.

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