Wind-driven entrainment in a stably stratified fluid

Experiments on mixed-layer deepening in a straight wind flume initially containing a two-layer fluid were carried out. In order to simulate an effectively unlimited water body, or a situation where the presence of end walls is not yet noticeable, the water from the upper layer was withdrawn at the downstream end, and supplied again at the...

Buoyancy-driven leakage of oil from a ruptured submarine pipeline

The rupture of a submarine oil pipeline starts various mechanisms leading to an oil spill. Among these mechanisms the leakage of oil driven by the difference in specific gravities of oil and sea-water is difficult to estimate. A simple mathematical model has been developed and laboratory experiments have been carried out to obtain an insight...

On the destratification of lakes and reservoirs using bubble columns

The aim of this research project was (i) to obtain an understanding of the destratification process caused by the local injection of air at the bottom of a thermally stratified lake or reservoir, and (ii) to make possible quantitative predictions of the rate of destratification in a given situation. To this end a mathematical model was set up,...