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Research Videos

Contaminant Intrusion Cavitation
Dynamic Leakage


During the investigation, a series of videos were produced capturing some of the most signficant phenomena observed in the experimental work. Negative pressures can result in cavitation (in extreme cases), but the simultaneous existence of a leak and a contaminant external to a pipe coupled with such negative pressures, can also result in contaminant ingress. The video below shows how a pseudo pollutant (dye) may be drawn into the pipe during a negative transient event through a leak. Signficantly the investigation concluded that not only is the contaminant sucked into the pipe, but remains in it and is transferred downstream once the flow in the system resumes.



Contaminant ingress through a 5mm diameter orifice.

 


 
Maintained and updated by Sam Fox, June 2015