On the Use of the Preston Tube in Concentric Annuli
1967 ◽
Vol 71
(684)
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pp. 865-865
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In his technical note in the January 1967 JOURNAL, Quarmby (pp 47-49) concludes that because he was able to predict the axial pressure gradient in a concentric smooth annulus by using Preston tubes to measure the inner and outer wall shear stress, then the Preston tubes are giving correct values for the wall shear stresses. I cannot agree that this is a valid conclusion to draw. A Preston tube can only give wall shear stress correctly if the dimensionless velocity in the wall region is the same as that for which the tube was calibrated.
1999 ◽
Vol 25
(2)
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pp. 365-376
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2012 ◽
Vol 05
(02)
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pp. 1250019
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2000 ◽
Vol 123
(2)
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pp. 134-144
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2018 ◽
Vol 152
◽
pp. 02004
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2018 ◽
Vol 2018
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pp. 1-16
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2011 ◽
Vol 8
(64)
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pp. 1594-1603
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