Technical Briefs

Combination of CFD and DOE to Analyze and Improve the Mass Flow Rate in Urinary Catheters

[+] Author and Article Information
Patrick Frawley, Marco Geron

Department of Mechanical and Aeronautical Engineering, University of Limerick, Casteltroy, Limerick, Ireland

J Biomech Eng 131(8), 084501 (Jun 19, 2009) (5 pages) doi:10.1115/1.3128692 History: Received November 25, 2008; Revised March 11, 2009; Published June 19, 2009

The urinary catheter is a thin plastic tube that has been designed to empty the bladder artificially, effortlessly, and with minimum discomfort. The current CH14 male catheter design was examined with a view to optimizing the mass flow rate. The literature imposed constraints to the analysis of the urinary catheter to ensure that a compromise between optimal flow, patient comfort, and everyday practicality from manufacture to use was achieved in the new design. As a result a total of six design characteristics were examined. The input variables in question were the length and width of eyelets 1 and 2 (four variables), the distance between the eyelets, and the angle of rotation between the eyelets. Due to the high number of possible input combinations a structured approach to the analysis of data was necessary. A combination of computational fluid dynamics (CFD) and design of experiments (DOE) has been used to evaluate the “optimal configuration.” The use of CFD couple with DOE is a novel concept, which harnesses the computational power of CFD in the most efficient manner for prediction of the mass flow rate in the catheter.

Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

BS directive for evaluating mass flow rate through a catheter

Grahic Jump Location
Figure 2

Geometrical details of CH-14 catheter (all measures are in millimeters)

Grahic Jump Location
Figure 3

Mesh generated for the CH-14 catheter

Grahic Jump Location
Figure 4

Vector plot in a streamwise section of the catheter

Grahic Jump Location
Figure 5

Vector plot in the top part of the catheter-dead fluid zone at the tip

Grahic Jump Location
Figure 6

Main plot effect for mass flow rate output

Grahic Jump Location
Figure 7

Interaction plot for mass flow rate



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In