APS -66th Annual Meeting of the APS Division of Fluid Dynamics - Event - Urinal Dynamics

http://meetings.aps.org/Meeting/DFD13/Event/202554

In response to harsh and repeated criticisms from our mothers and
several failed relationships with women, we present the splash
dynamics of a simulated human male urine stream impacting rigid and
free surfaces. Our study aims to reduce undesired splashing that may
result from lavatory usage. Experiments are performed at a pressure
and flow rate that would be expected from healthy male
subjects.\footnote{Lapides, J., Fundamentals of Urology, W.B.
Saunders, Philadelphia, 1976.} For a rigid surface, the effects of
stream breakup and surface impact angle on lateral and vertical
droplet ejection distances are measured using high-speed photography
and image processing. For free surface impact, the effects of velocity
and fluid depth on droplet ejection distances are measured. Guided by
our results, techniques for splash reduction are proposed.

---SPSmith