The critical Taylor numbers for five different non-Newtonian
solutions were determined experimentally by visual observation using
the hydrogen bubble technique. Although three different gap sizes
were used, only the data for the smallest size can be considered
satisfactorily accurate. Smaller hydrogen bubbles than those used
in this experiment are necessary for more aocurate determination.
Contrary to a finding by others, the present experiment indicates
that the critical Taylor number is decreased as the concentration
The shear on the outer cylinder due to rotation of the inner
cylinder was also measured for an intermediate range of Reynolds
number, i.e. laminar flow at superoritical Taylor number. Substantial
reductions of frictional drag coefficient Were achieved at
higher additive concentrations When the comparison was based on
equal Reynolds number.
David Taylor Model Basin, Office of Naval Research Contract Nonr 710(62)
Song, C. S.; Tsai, F. Y..
Experimental Investigation of Taylor Instability Using Non-Newtonian Fluids.
St. Anthony Falls Laboratory.
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