ISSN:
1573-8507
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract An anomalous lowering of the readings of Pitot tubes in flows of suspensions of solid particles of equal densities has been observed in a liquid. A universal dependence has been obtained, connecting the defect in the readings of Pitot tubes with their diameter, with the diameter of the particles of the suspensions, with the velocity of the flow, and with the volumetric concentration of the particles. The article presents new data on anomalous readings of Pitot tubes in polymer solutions, lowering the turbulent friction resistance. The character of this phenomenon is analogous to the lowering of the readings in suspensions. It is postulated that the anomalous readings of Pitot tubes in polymer solutions are connected with elasticoviscous associates of macromolecules of the polymer and molecules of the solvent. Experimental data are used to calculate the effective dimensions and volumetric concentration of the associates in the solutions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01186463
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