Titlebook: Viscous Drag Reduction; Proceedings of the S C. Sinclair Wells Conference proceedings 1969 Springer Science+Business Media New York 1969 re

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Some Observations on the Flow Characteristics of Certain Dilute Macromolecular Solutionsthe secondary bulk effect only occurs with solutions which exhibit detectable elastic properties..Some complex soap systems are also extremely effective drag reducers, and some unusual flow characteristics exhibited by one such system are also discussed in this paper.

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Drag Reduction in External Flows of Additive Solutionsaphs of submerged jets confirm that additives suppress turbulent diffusion. The flat plate results also suggest that for efficient drag reduction, the solution ejected into the boundary layer should be dilute and that the rate of ejection should be comparable to the discharge within the inner bounda

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An Analysis of Uniform Injection of a Drag-Reducing Fluid into a Turbulent Boundary Layere consumption” is defined and compared with specific fuel consumption of several underwater propulsion units. The comparison shows slot injection of a 1000 ppm solution to be of marginal value, while porous wall injection would give more performance increase than adding an equal amount of fuel. The

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Mark V. Morkovinxtend the notion of orbital surfaces. In the Galois theory orbital surfaces, orbital curves and points can be expressed by means of divisors and singularities. These are quite classical objects. The classical language does not work nicely in the general theory of surface coverings. Here we have to i