Secondary circulation in fluid flow

Author:

Abstract

Secondary circulation appears after fluid with a non-uniform velocity distribution passes round a bend. It alters the character of the flow and is a source of loss. A general expression is developed for its change along a streamline in a perfect, incompressible fluid. The flow in bent circular pipes is analyzed and the theory is compared with experiments on bent pipes and rectangular ducts. In bends the secondary flow is not spiral but oscillatory, the direction of the circulation changing periodically. The theory shows that secondary circulation remains unchanged if streamlines are geodesics on surfaces of constant total pressure.

Publisher

The Royal Society

Subject

Pharmacology (medical)

Reference6 articles.

1. Davis G. J. 1910 Bull. Univ. Wis. Engng

2. XVI.Note on the motion of fluid in a curved pipe

3. Joy W. 1950 Thesis Massachusetts institute of Technology.

4. Lamb Sir Horace 1932 Hydrodynamics 6th ed. p. 244. Cambridge University Press.

5. Squire H. B. & Winter K. G. 1949

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