This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: 211. In the literature you have found an empirical equation for the pressure drop in a columnpacked with a particular type of particle. The pressure drop is given by the dimensionallyincorrectequation0.150.851.851.2v4.7pHpd=which requires the following units:p= pressure drop, lbf/ft2 = fluid viscosity, lbm/ft sH= height of the column, ft= density, lbm/ft3v = superficial velocity, ft/spd= effective particle diameter, ftImagine that you are given data for , H, , v and pdin S.I. units and you wish to use it directlyto calculate the pressure drop in 2flb / ft . How would you change the empirical equation for pto obtain another empirical equation suitable for use with S.I. units? Note that your objective hereis to replace the coefficient 4.7 with a new coefficient. Begin by putting the equation indimensionally correct form, i.e., find the units associated with the coefficient 4.7, and then set upthe empiricism so that it can be used with S.I. units.the empiricism so that it can be used with S....
View
Full Document
 Winter '10
 B.G.Higgins
 International System of Units, 1 lb, 1 ft, 0.3048 m, kg/m3, 0.4536 kg

Click to edit the document details