<DOC>
<DOCNO>
1365
</DOCNO>
<TITLE>
approximate calculation of the laminar boundary layer .
</TITLE>
<AUTHOR>
thwaites,b.
</AUTHOR>
<BIBLIO>
aero. quart. 1, 1949-1950.
</BIBLIO>
<TEXT>
  after analyzing a large class of boundary-layer velocityprofiles,
the author discovered that the functions l(m) and
h(m) for all such cases differ only slightly from each other
over the whole range of positive and negative pressure gradients
.  here l, m and h are defined by
being the velocitycomponent
in the x direction and u the value of u at the
edge of the boundary-layer and and the displacement
and momentum thickness, respectively .  based on this discovery,
an approximate method is proposed by constructing
two universal curves l(m) and h(m) for all conceivable
boundary-layer flows found in practice .  once these are
chosen, karman's momentum-integral can be written in the
form, v being the kinematic viscosity
coefficient, and can be integrated numerically .  as
examples, both howarth's and hartree's
tained is considered good for practical purposes .
</TEXT>
</DOC>
