66th Annual Meeting of the APS Division of Fluid Dynamics Volume 58, Number 18 Sunday–Tuesday, November 24–26, 2013; Pittsburgh, Pennsylvania

Session E9: Biofluids: General III - Pumping Phenomena

4:45 PM–5:50 PM, Sunday, November 24, 2013

Room: 333



Chair: Anne Staples, Virginia Polytechnic Institute and State University



Abstract ID: BAPS.2013.DFD.E9.3



Abstract: E9.00003 : Urinal Dynamics

5:11 PM–5:24 PM



Preview Abstract Abstract

Authors:

Randy Hurd

(Brigham Young University)

Kip Hacking

(Brigham Young University)

Benjamin Haymore

(Brigham Young University)

Tadd Truscott

(Brigham Young University)

Collaboration:

Splash Lab

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.