Boundary Lyer Theory

8 I. Ont,line of fluid lnotion with friction
kp soc/m2
kp hr/m2
I'n see
kg/m lir J
Ibf sec/ft2
Ihf hr/ft2
Il,/ft scc
m2/sec
m2/hr
cm2/scc (Stokes)
ft2/sec
ftz/hr
I
1
2.7778 x
1 X lo-"
9.2903 x
2.5806 x
Table 1 .l. Visco~ity conversion factors Numerical values: In t,lrc case of liquids the vi~cosit~y, /t, is nearly indcpcndent,
n. Aldl~te viscosity 11
of pressurc and tlccreascs at a high raLc with increasing tcmpcrat,urc. 111 thc case of
gascs, to n first npproximat,ion, thc vi~cosit~y cnn be talrcrr to be intlcpcntlcnt of
prcmitrc bi~t, it irrrrcnscs wil,lr l,cmllcrnl,rtrc. 'I'Iio Itinc?~nal,ic vi~cosil,~, 11, for litl~~itl.q
has t,hc smw type of t,cmpcrrat.i~ro tloj~otttlottc:o as p, I)ct.n.~tso 0l1r tltwsit,y, 0, (-IIJLII~~S
only ~liglrtly with tcnrpomI,urc, Ilowcvcr, in t h caw of gn.scs, for whiclt C, tlcc:ro:t..qc~
consitlcrsbly with incrc:~sitig tc1npcrn1,11rc, 11 incrcascs rnpitlly willit (,cmpcmt.urc.
Table 1.2 contains some numerical values of Q, p and v for water and air.
Table 1.3 contains some additional lisefitl tlat,a.
0. I