<DOC>
<DOCNO>
651
</DOCNO>
<TITLE>
heat transfer to separated and reattached subsonic
turbulen flows obtained downstream of a surface step .
</TITLE>
<AUTHOR>
seban,r.a., emery,a. and levy,a.
</AUTHOR>
<BIBLIO>
j. ae. scs. 1959, 809.
</BIBLIO>
<TEXT>
  local heat-transfer coefficients and recovery factors are presented
for separated and reattached turbulent flows as obtained
by a downward step in an otherwise flat surface in a two-dimensional,
subsonic, air flow .  the region downstream of the step,
the focus of this investigation, contained a region of separated
flow with reattachment at about five step heights downstream,
followed by a section of reattached flow .  the salient feature of
the results is the maximum in the local heat-transfer coefficient
at the reattachment point, with values thereof diminishing in the
separated region and also in the reattached region, where they
tend toward values characteristic of turbulent boundary-layer
flow .  it is found that for most of the region the heat-transfer
coefficient depends on the velocity to about the 0.8 power, though
a decreased dependence may exist in the separated region .  recovery
factors have the characteristically low values associated
with separated flows, and do not attain values typical of turbulent
boundary-layer flows within the downstream lengths available
.
</TEXT>
</DOC>
