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Published January 1984 | public
Journal Article

Nonlinear Interactions in the Fluid Mechanics of Helium II


Besides its practical importance in a host of technical applications, fluid mechanics retains its intrinsic interest as a physical discipline. The governing equations are nonlinear, and hence the motion of fluids demonstrates the complexities of solution of a nonlinear field theory, a fact that has been appreciated more and more in recent times. The most striking manifestations of this nonlinearity are shock waves and turbulence, corresponding to nonlinear wave and vortex interactions, respectively.

Additional Information

© 1984 Annual Reviews. The authors would like to acknowledge the many helpful discussions with faculty and students at GALCIT. The assistance of D. M. Moody and J. R. Torczynski was of great value in the preparation of the manuscript. The schlieren photographs (Figure 20) were taken by Dagmar Gerthsen during her stay at GALCIT. Jacquelyn Beard's patient use of the CIT word processor was essential to the on-time completion of this paper and is gratefully acknowledged.

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