Key Words: Catheter-associated urinary tract infection (CAUTI), bacteriuria, indwelling catheter, dependent loop, air lock, intraluminal transmission, urinary retention, Froude number, Eotvos number.
The Eotvos Number (EO) is more suitable than FR to explain flow characteristics through small diameter tubing.
Urine Eotvos Number Calculations Urine Properties Specific Gravity 1.
Effects of Eotvos number
and dimensionless liquid volumetric flux on lateral motion of a bubble in laminar duct flow, Advances in Multiphase Flow, Elsevier, 3-15 p.
In 1973, Grace developed a well-known graphical correlation for individual gas bubble rising in infinite liquid using three dimensionless numbers, including the Reynolds number (Re), the Eotvos number
(Eo), and the Morton number (Mo):
First, Figure 5 presents the eccentricity data of Figure 4 as a function of Eotvos number (Eo).
Since Marangoni numbers can have values between 0 and infinity, a scaled correction factor [beta] to the Eotvos number can be applied identical to the correction parameter S of Rodrigue et al.
In Figure 6, it is clear that all the data of Figure 5 collapsed into a single curve by plotting drop eccentricity as a function of a modified Eotvos number (Eo) defined as:
In our case, a shape transition from spherical to oblate spheroid was observed at an Eotvos number around unity.