Boundary layer of a body of revolution in a drag-reducing polymer solution

1982 ◽  
Vol 16 (3) ◽  
pp. 355-361
Author(s):  
V. B. Amfilokhiev ◽  
V. V. Droblenkov ◽  
G. I. Kanevskii ◽  
N. P. Mazaeva
Keyword(s):  
Boundary Layer ◽  
Polymer Solution ◽  
Body Of Revolution ◽  
Drag Reducing Polymer

scholarly journals Modification of turbulent boundary layer coherent structures with drag reducing polymer solution

2020 ◽  
Vol 32 (1) ◽  
pp. 015107 ◽  
Author(s):  
Yasaman Farsiani ◽  
Zeeshan Saeed ◽  
Balaji Jayaraman ◽  
Brian R. Elbing
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Polymer Solution ◽  
Coherent Structures ◽  
Drag Reducing Polymer

Velocity measurements made with a laser dopplermeter on the turbulent pipe flow of a dilute polymer solution

1972 ◽  
Vol 51 (4) ◽  
pp. 673-685 ◽  
Author(s):  
M. J. Rudd
Keyword(s):  
Polymer Solution ◽  
Velocity Component ◽  
Pipe Flow ◽  
Viscous Sublayer ◽  
Turbulent Pipe Flow ◽  
Velocity Measurements ◽  
Velocity Fluctuations ◽  
Conventional Models ◽  
Drag Reducing Polymer ◽  
Spanwise Velocity

This paper presents some new measurements which have been made on a drag-reducing polymer solution in pipe flow. A novel type of laser dopplermeter, which has been developed by the author, is briefly described and the measurements which have been obtained are given. These results and their implications are then discussed in terms of conventional models for turbulent flow in a pipe. These suggest that the polymer has very little effect upon the turbulent core of the flow, but thickens and stabilizes the viscous sublayer. The turbulent intensity inside the sublayer is unchanged but, owing to its thickening, the velocity fluctuations just outside are greater. There is not a general suppression of turbulence within the sublayer although well inside the sublayer the spanwise velocity component is found to be reduced.

Drag Reduction of Flat Plates with Slot Ejection of Polymer Solution

1970 ◽  
Vol 14 (02) ◽  
pp. 79-83
Author(s):  
Paul S. Granville
Keyword(s):  
Boundary Layer ◽  
Drag Reduction ◽  
Polymer Solution ◽  
Concentration Boundary Layer ◽  
Fourth Stage ◽  
Flat Plates ◽  
Concentration Boundary ◽  
Momentum Boundary Layer

The drag reduction due to polymer being emitted from a slot is analytically treated for the fourth stage for which the concentration boundary layer coincides with the momentum boundary layer.

A Note on the Resistance of Bodies of Revolution and Ship Forms

1974 ◽  
Vol 18 (03) ◽  
pp. 153-168
Author(s):  
N. Matheson ◽  
P. N. Joubert
Keyword(s):  
Boundary Layer ◽  
Reasonable Agreement ◽  
The Body ◽  
Experimental Results ◽  
Body Of Revolution ◽  
Bodies Of Revolution ◽  
Boundary Layer Development ◽  
Layer Development

A simple so-called 'equivalent' body of revolution is proposed for reflex ship forms in an attempt to simplify calculation of the boundary layer over a ship's hull when there is no wavemaking. How­ever, exhaustive testing of one body of revolution did not produce a favorable comparison with re­sults for the corresponding reflex model. Gadd's recently proposed theory was used to calculate the boundary-layer development over the body of revolution. Reasonable agreement was obtained between the calculated and experimental results.

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